mirror of
https://github.com/hasherezade/tiny_tracer
synced 2026-06-08 14:36:37 +00:00
hasherezade
739 lines
29 KiB
C++
739 lines
29 KiB
C++
#include "AntiDebug.h"
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#include <iostream>
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#include <sstream>
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#include <string>
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#include <map>
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#include <set>
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#include "ProcessInfo.h"
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#include "Util.h"
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#include "TraceLog.h"
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#include "Settings.h"
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#include "PinLocker.h"
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#include "TinyTracer.h"
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#include "ModuleInfo.h"
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#include "EvasionWatch.h"
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#define ANTIDBG_LABEL "[ANTIDEBUG] --> "
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using namespace LEVEL_PINCLIENT;
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/* ================================================================== */
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// Global variables used by AntiDebug
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/* ================================================================== */
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namespace AntiDbg
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{
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ADDRINT m_pebAddr = 0;
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ADDRINT m_heapFlags = 0;
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ADDRINT m_heapForceFlags = 0;
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std::vector<std::string> loadedLib;
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}; // namespace AntiDebug
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class AntiDbgWatch : public EvasionWatch
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{
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public:
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AntiDbgWatch() { Init(); }
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virtual BOOL Init();
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std::map<std::string, std::string> funcToLink;
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};
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AntiDbgWatch m_AntiDbg;
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/* ==================================================================== */
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// Leveraging the existing paramToStr, extracts only the string after '->'
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/* ==================================================================== */
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std::wstring paramToStrSplit(VOID* arg1)
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{
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if (arg1 == NULL) {
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return L"0";
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}
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std::wstring inStr = paramToStr(arg1);
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size_t arrowPos = inStr.find(L"->");
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if (arrowPos != 0) {
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// Extract the substring after the arrow symbol and contained in quotes
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std::wstring secondPart = inStr.substr(arrowPos + 3);
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size_t startPos = secondPart.find('"');
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if (startPos != std::string::npos) {
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size_t endPos = secondPart.rfind('"');
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if (endPos != std::string::npos) {
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secondPart = secondPart.substr(startPos + 1, endPos - startPos - 1);
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}
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}
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return secondPart;
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}
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return L"0";
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}
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/* ==================================================================== */
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// System information
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/* ==================================================================== */
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// Add these declarations alongside the VirtualQuery ones:
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extern "C" {
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__declspec(dllimport) int __stdcall IsWow64Process(void* hProcess, int* Wow64Process);
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__declspec(dllimport) void* __stdcall GetCurrentProcess(void);
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}
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BOOL WinIsNativeOs32(void)
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{
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BOOL isNativeOs32 = FALSE;
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#ifndef _WIN64
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int isWow64 = 0;
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if (IsWow64Process(GetCurrentProcess(), &isWow64)) {
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// If WOW64, then OS is 64-bit; if not, native 32-bit
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isNativeOs32 = isWow64 ? FALSE : TRUE;
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}
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else {
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isNativeOs32 = TRUE; // assume 32-bit if check fails
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}
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#endif
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return isNativeOs32;
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}
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BOOL WinIsWindowsVistaOrGreater(void)
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{
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// PIN 4.x requires Windows 10+, which is always >= Vista
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return TRUE;
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}
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/* ==================================================================== */
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// Log info with antidebug label
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/* ==================================================================== */
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VOID LogAntiDbg(const WatchedType wType, const ADDRINT Address, const char* msg, const char *link=nullptr)
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{
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LogMsgAtAddress(wType, Address, ANTIDBG_LABEL, msg, link);
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}
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/* ==================================================================== */
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// Callback function to be executed when memory is accessed
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/* ==================================================================== */
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VOID AntiDbg::WatchMemoryAccess(ADDRINT addr, UINT32 size, const ADDRINT insAddr)
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{
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PinLocker locker;
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const WatchedType wType = isWatchedAddress(insAddr);
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if (wType == WatchedType::NOT_WATCHED) return;
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if (!m_pebAddr) return;
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// Check the accessed memory address for antidebug tricks
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if (addr == m_pebAddr + 2) {
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return LogAntiDbg(wType, insAddr, "PEB!BeingDebugged accessed");
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}
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if (addr == 0x7ffe02d4) {
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return LogAntiDbg(wType, insAddr, "KUSER_SHARED_DATA!KdDebuggerEnabled accessed",
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"https://anti-debug.checkpoint.com/techniques/debug-flags.html#kuser_shared_data");
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}
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#ifdef _WIN64
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ADDRINT globalFlagOffset = 0xBC;
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#else
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ADDRINT globalFlagOffset = 0x68;
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#endif
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if (addr == m_pebAddr + globalFlagOffset) {
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return LogAntiDbg(wType, insAddr, "PEB!NtGlobalFlag accessed");
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}
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if (addr == m_heapFlags || addr == m_heapForceFlags) {
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return LogAntiDbg(wType, insAddr, "Heap Flags accessed",
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"https://anti-debug.checkpoint.com/techniques/debug-flags.html#manual-checks-heap-flags");
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}
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}
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/* ==================================================================== */
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// Callback function to be executed when a compare is executed
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/* ==================================================================== */
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namespace AntiDbg {
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std::map<ADDRINT, size_t> cmpOccurrences;
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}; // namespace AntiDbg
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VOID AntiDbg::WatchCompareSoftBrk(ADDRINT Address, UINT64 immVal)
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{
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PinLocker locker;
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const WatchedType wType = isWatchedAddress(Address);
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if (wType == WatchedType::NOT_WATCHED) return;
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bool isSet = false;
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const size_t kMinOccur = 3;
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const UINT8 val = immVal & 0xFF;
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if (val == 0xCC) {
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cmpOccurrences[Address]++;
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if (cmpOccurrences[Address] == kMinOccur) isSet = true;
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}
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if (isSet) {
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LogAntiDbg(wType, Address, "Software Breakpoint comparison",
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"https://anti-debug.checkpoint.com/techniques/process-memory.html#anti-step-over");
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}
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}
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namespace AntiDbg {
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std::map<THREADID, int> popfThreads;
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VOID FlagsCheck(const CONTEXT* ctxt, THREADID tid)
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{
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PinLocker locker;
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const ADDRINT Address = (ADDRINT)PIN_GetContextReg(ctxt, REG_INST_PTR);
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const WatchedType wType = isWatchedAddress(Address);
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if (wType == WatchedType::NOT_WATCHED) return;
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ADDRINT pushedVal = UNKNOWN_ADDR;
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const ADDRINT* stackPtr = reinterpret_cast<ADDRINT*>(PIN_GetContextReg(ctxt, REG_STACK_PTR));
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size_t copiedSize = PIN_SafeCopy(&pushedVal, stackPtr, sizeof(pushedVal));
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if (copiedSize != sizeof(pushedVal)) {
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return;
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}
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const bool isTrap = (pushedVal & 0x100) ? true : false;
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if (!isTrap) return;
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LogAntiDbg(wType, Address, "Trap Flag set",
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"https://anti-debug.checkpoint.com/techniques/assembly.html#popf_and_trap_flag");
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pushedVal ^= 0x100;
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PIN_SafeCopy((VOID*)stackPtr, (const VOID*)&pushedVal, sizeof(pushedVal));
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if (m_Settings.emulateSingleStep) {
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popfThreads[tid] = 0;
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}
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}
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VOID FlagsCheck_after(const CONTEXT* ctxt, THREADID tid, ADDRINT eip)
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{
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bool throwExcept = false;
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{
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PinLocker locker;
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auto itr = popfThreads.find(tid);
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if (itr == popfThreads.end()) {
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return; // trap flag wasn't set in this thread
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}
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if (itr->second == 1) {
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popfThreads.erase(tid); // erase the stored TID
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throwExcept = true;
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}
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else {
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itr->second++;
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}
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}
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if (throwExcept) {
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EXCEPTION_INFO exc;
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exc.Init(EXCEPTCODE_DBG_SINGLE_STEP_TRAP, eip);
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PIN_RaiseException(ctxt, tid, &exc);
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}
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}
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}; // namespace AntiDbg
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VOID AntiDbg::InstrumentFlagsCheck(INS ins)
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{
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#ifdef _WIN64
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const char* POPF_MNEM = "popfq";
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#else
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const char* POPF_MNEM = "popfd";
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#endif
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if (util::isStrEqualI(INS_Mnemonic(ins), POPF_MNEM))
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{
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INS_InsertCall(
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ins,
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IPOINT_BEFORE, (AFUNPTR)FlagsCheck,
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IARG_CONTEXT,
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IARG_THREAD_ID,
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IARG_END
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);
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}
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else {
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if (m_Settings.emulateSingleStep) {
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INS_InsertCall(
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ins,
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IPOINT_BEFORE, (AFUNPTR)FlagsCheck_after,
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IARG_CONTEXT,
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IARG_THREAD_ID,
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IARG_INST_PTR,
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IARG_END
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);
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}
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}
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}
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VOID AntiDbg::InterruptCheck(const CONTEXT* ctxt)
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{
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PinLocker locker;
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const ADDRINT Address = (ADDRINT)PIN_GetContextReg(ctxt, REG_INST_PTR);
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const WatchedType wType = isWatchedAddress(Address);
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if (wType == WatchedType::NOT_WATCHED) return;
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int interruptID = 0;
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if (!fetchInterruptID(Address, interruptID)) return;
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if (interruptID == 1) {
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LogAntiDbg(wType, Address, "INT1",
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"https://anti-debug.checkpoint.com/techniques/assembly.html#ice");
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}
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if (interruptID == 3) {
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LogAntiDbg(wType, Address, "INT3",
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"https://anti-debug.checkpoint.com/techniques/assembly.html#int3");
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}
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if (interruptID == 0x2d) {
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LogAntiDbg(wType, Address, "INT2D",
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"https://anti-debug.checkpoint.com/techniques/assembly.html#int2d");
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}
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}
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/* ==================================================================== */
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// Process API calls (related to AntiDebug techniques)
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/* ==================================================================== */
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VOID AntiDbgLogFuncOccurrence(const ADDRINT Address, const THREADID tid, const CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5)
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{
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PinLocker locker;
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const WatchedType wType = isWatchedAddress(Address);
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if (wType == WatchedType::NOT_WATCHED) return;
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std::stringstream ss;
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ss << "^ " << name;
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auto itr = m_AntiDbg.funcToLink.find(name);
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if (itr != m_AntiDbg.funcToLink.end()) {
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return LogAntiDbg(wType, Address, ss.str().c_str(),
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itr->second.c_str());
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}
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return LogAntiDbg(wType, Address, ss.str().c_str());
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}
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VOID AntiDbg_LoadLibrary(const ADDRINT Address, const THREADID tid, const CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5)
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{
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if (!argCount) return;
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PinLocker locker;
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if (isWatchedAddress(Address) == WatchedType::NOT_WATCHED) return;
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if (!arg1 || !isValidReadPtr(arg1)) return;
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// Track LoadLibraryX to detect access to LOAD_DLL_DEBUG_INFO
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// Get the library name from argument
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std::wstring argStr = paramToStrSplit(arg1);
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// Convert from wide string for comparison
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std::string _argStr(argStr.begin(), argStr.end());
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AntiDbg::loadedLib.push_back(_argStr);
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}
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VOID AntiDbg_BlockInput(const ADDRINT Address, const THREADID tid, const CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5)
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{
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if (!argCount) return;
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PinLocker locker;
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const WatchedType wType = isWatchedAddress(Address);
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if (wType == WatchedType::NOT_WATCHED) return;
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static size_t BlockInputOccurrences = 0;
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// Check if BlockInput is called more than one time
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BlockInputOccurrences++;
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if (BlockInputOccurrences > 1) {
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return LogAntiDbg(wType, Address, "^ user32!BlockInput()",
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"https://anti-debug.checkpoint.com/techniques/interactive.html#blockinput");
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}
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}
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VOID AntiDbg_NtSetInformationThread(const ADDRINT Address, const THREADID tid, const CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5)
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{
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if (!argCount) return;
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PinLocker locker;
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const WatchedType wType = isWatchedAddress(Address);
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if (wType == WatchedType::NOT_WATCHED) return;
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enum ThreadInformationClass { ThreadHideFromDebugger = 0x11 };
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const uint32_t NtCurrentThread = -2;
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// Check if NtSetInformationThread has been called with parameter ThreadHideFromDebugger
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if (int((size_t)arg1) == NtCurrentThread &&
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int((size_t)arg2) == ThreadInformationClass::ThreadHideFromDebugger) {
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return LogAntiDbg(wType, Address, "^ ntdll!NtSetInformationThread (NtCurrentThread -> ThreadHideFromDebugger)",
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"https://anti-debug.checkpoint.com/techniques/interactive.html#ntsetinformationthread");
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}
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}
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VOID AntiDbg_RaiseException(const ADDRINT Address, const CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5)
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{
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if (!argCount) return;
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PinLocker locker;
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const WatchedType wType = isWatchedAddress(Address);
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if (wType == WatchedType::NOT_WATCHED) return;
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// RaiseException constants
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enum ExceptionCode { kDBG_CONTROL_C = 0x40010005, kDBG_RIPEVENT = 0x40010007 };
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// kernel32!RaiseException() with DBG_CONTROL_C or DBG_RIPEVENT
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if (int((size_t)arg1) == ExceptionCode::kDBG_CONTROL_C || int((size_t)arg1) == ExceptionCode::kDBG_RIPEVENT) {
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return LogAntiDbg(wType, Address, "^ kernel32!RaiseException()",
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"https://anti-debug.checkpoint.com/techniques/exceptions.html#raiseexception");
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}
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}
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VOID AntiDbg_NtQuerySystemInformation(const ADDRINT Address, const THREADID tid, const CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5)
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{
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if (!argCount) return;
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PinLocker locker;
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const WatchedType wType = isWatchedAddress(Address);
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if (wType == WatchedType::NOT_WATCHED) return;
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enum SystemInformationClass {
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SystemKernelDebuggerInformation = 0x23
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};
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// function ntdll!NtQuerySystemInformation() with first parameter set to 0x23 (SystemKernelDebuggerInformation)
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if (int((size_t)arg1) == SystemInformationClass::SystemKernelDebuggerInformation) {
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return LogAntiDbg(wType, Address, "^ ntdll!NtQuerySystemInformation (SystemKernelDebuggerInformation)",
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"https://anti-debug.checkpoint.com/techniques/debug-flags.html#using-win32-api-checks-ntquerysysteminformation");
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}
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}
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VOID AntiDbg_NtQueryInformationProcess(const ADDRINT Address, const THREADID tid, const CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5)
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{
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if (argCount < 2) return;
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PinLocker locker;
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const WatchedType wType = isWatchedAddress(Address);
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if (wType == WatchedType::NOT_WATCHED) return;
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enum ProcessInformationClass { ProcessDebugPort = 0x7, ProcessDebugFlags = 0x1f, ProcessDebugObjectHandle = 0x1e };
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// function ntdll!NtQueryInformationProcess with ProcessInformationClass == 7 (ProcessDebugPort)
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if (int((size_t)arg2) == ProcessInformationClass::ProcessDebugPort) {
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return LogAntiDbg(wType, Address, "^ ntdll!NtQueryInformationProcess (ProcessDebugPort)",
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"https://anti-debug.checkpoint.com/techniques/debug-flags.html#using-win32-api-ntqueryinformationprocess-processdebugport");
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}
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// function ntdll!NtQueryInformationProcess with ProcessInformationClass == 0x1f (ProcessDebugFlags)
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if (int((size_t)arg2) == ProcessInformationClass::ProcessDebugFlags) {
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return LogAntiDbg(wType, Address, "^ ntdll!NtQueryInformationProcess (ProcessDebugFlags)",
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"https://anti-debug.checkpoint.com/techniques/debug-flags.html#using-win32-api-ntqueryinformationprocess-processdebugflags");
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}
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// function ntdll!NtQueryInformationProcess with ProcessInformationClass == 0x1e (ProcessDebugObjectHandle)
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if (int((size_t)arg2) == ProcessInformationClass::ProcessDebugObjectHandle) {
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return LogAntiDbg(wType, Address, "^ ntdll!NtQueryInformationProcess (ProcessDebugObjectHandle)",
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"https://anti-debug.checkpoint.com/techniques/debug-flags.html#using-win32-api-ntqueryinformationprocess-processdebugobjecthandle");
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}
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}
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VOID AntiDbg_NtQueryObject(const ADDRINT Address, const THREADID tid, const CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5)
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{
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if (argCount < 2) return;
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PinLocker locker;
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const WatchedType wType = isWatchedAddress(Address);
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if (wType == WatchedType::NOT_WATCHED) return;
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enum ObjectInformationClass { ObjectAllTypesInformation = 3 };
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// ntdll!NtQueryObject() to access DebugObject (with ObjectAllTypesInformation as 2nd argument)
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if (int((size_t)arg2) == ObjectInformationClass::ObjectAllTypesInformation) {
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return LogAntiDbg(wType, Address, "^ ntdll!NtQueryObject (ObjectAllTypesInformation)",
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"https://anti-debug.checkpoint.com/techniques/object-handles.html#ntqueryobject");
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}
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}
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VOID AntiDbg_CreateFile(const ADDRINT Address, const THREADID tid, const CHAR* name, uint32_t argCount, VOID* arg1, VOID* arg2, VOID* arg3, VOID* arg4, VOID* arg5)
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{
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if (argCount < 3) return;
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PinLocker locker;
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const WatchedType wType = isWatchedAddress(Address);
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if (wType == WatchedType::NOT_WATCHED) return;
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// kernel32!CreateFileX called on the module itself with Exclusive access, or on loaded libraries
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// Check only exclusive accesses for optimization
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if (int((size_t)arg3) == 0) {
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IMG img = IMG_FindByAddress(Address);
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if (!IMG_Valid(img)) return;
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if (!arg1 || !isValidReadPtr(arg1)) return;
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// Get the module name from image
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std::string moduleName = IMG_Name(img);
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// Get the module name from arguments
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std::wstring argStr = paramToStrSplit(arg1);
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// Convert from wide string for comparison
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std::string _argStr(argStr.begin(), argStr.end());
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// Check if open is done on module
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if (util::isStrEqualI(_argStr, moduleName)) {
|
|
return LogAntiDbg(wType, Address, "^ kernel32!CreateFile on module",
|
|
"https://anti-debug.checkpoint.com/techniques/object-handles.html#createfile");
|
|
}
|
|
|
|
// Check if open is done on loaded libraries
|
|
for (size_t i = 0; i < AntiDbg::loadedLib.size(); i++) {
|
|
if (util::isStrEqualI(_argStr, AntiDbg::loadedLib[i])) {
|
|
return LogAntiDbg(wType, Address, "^ kernel32!CreateFile on loaded lib",
|
|
"https://anti-debug.checkpoint.com/techniques/object-handles.html#loadlibrary");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//* ==================================================================== */
|
|
// "CloseHandle" instrumentation, detects invalid handlers
|
|
/* ===================================================================== */
|
|
|
|
VOID AntiDbg_CloseHandle_after(ADDRINT Address, THREADID threadid, const CHAR* name, ADDRINT result)
|
|
{
|
|
PinLocker locker;
|
|
const WatchedType wType = isWatchedAddress(Address);
|
|
if (wType == WatchedType::NOT_WATCHED) return;
|
|
|
|
if (!result) {
|
|
// Invalid closure
|
|
return LogAntiDbg(wType, Address, "^ kernel32!CloseHandle (INVALID_HNDL_VAL)",
|
|
"https://anti-debug.checkpoint.com/techniques/object-handles.html#closehandle");
|
|
}
|
|
|
|
}
|
|
|
|
//* ==================================================================== */
|
|
// "GetTickCount" instrumentation
|
|
/* ===================================================================== */
|
|
|
|
template <class TICK_T>
|
|
VOID AntiDbg_GetTickCount_after(ADDRINT Address, THREADID threadid, const CHAR* name, const BOOL modify, TICK_T* result)
|
|
{
|
|
PinLocker locker;
|
|
static TICK_T emTick = 0;
|
|
static TICK_T prevTick = 0;
|
|
const WatchedType wType = isWatchedAddress(Address);
|
|
if (wType == WatchedType::NOT_WATCHED) return;
|
|
|
|
std::stringstream ss;
|
|
ss << "^ kernel32!" << name;
|
|
if (modify && result) {
|
|
TICK_T curr = (*result);
|
|
if (emTick) {
|
|
TICK_T diff = 1;
|
|
if (curr > prevTick) {
|
|
diff = ((curr - prevTick) / 10);
|
|
}
|
|
(*result) = emTick + diff;
|
|
ss << " -> NewTick: " << std::dec << (*result);
|
|
}
|
|
emTick = (*result);
|
|
prevTick = curr;
|
|
}
|
|
|
|
return LogAntiDbg(wType, Address, ss.str().c_str(),
|
|
"https://anti-debug.checkpoint.com/techniques/timing.html#gettickcount");
|
|
}
|
|
|
|
|
|
/* ==================================================================== */
|
|
// Collect some infos at Thread start, to be used later in checks
|
|
/* ==================================================================== */
|
|
|
|
BOOL getPEB(CONTEXT* ctxt, ADDRINT& pebAddr)
|
|
{
|
|
BOOL is_ok = FALSE;
|
|
ADDRINT sValue = 0;
|
|
#ifdef _WIN64
|
|
// Read the value from the memory address pointed by GS:[60h]
|
|
PIN_GetContextRegval(ctxt, REG_SEG_GS_BASE, reinterpret_cast<UINT8*>(&sValue));
|
|
sValue += 0x60;
|
|
#else
|
|
// Read the value from the memory address pointed by FS:[30h]
|
|
PIN_GetContextRegval(ctxt, REG_SEG_FS_BASE, reinterpret_cast<UINT8*>(&sValue));
|
|
sValue += 0x30;
|
|
#endif
|
|
// Save PEB Address
|
|
if (PIN_SafeCopy(&pebAddr, reinterpret_cast<VOID*>(sValue), sizeof(pebAddr)) == sizeof(pebAddr)) {
|
|
is_ok = TRUE;
|
|
}
|
|
return is_ok;
|
|
}
|
|
|
|
VOID AntiDbg::WatchThreadStart(THREADID threadid, CONTEXT* ctxt, INT32 flags, VOID* v)
|
|
{
|
|
PinLocker locker;
|
|
|
|
// Checks only the first thread
|
|
if (threadid != 0) {
|
|
return;
|
|
}
|
|
|
|
// Read the PEB address and save it in the global variable
|
|
if (!getPEB(ctxt, m_pebAddr)) return;
|
|
|
|
ADDRINT heapBase = 0;
|
|
#ifdef _WIN64
|
|
ADDRINT heapBaseOffset = 0x30;
|
|
ADDRINT heapFlagsOffset = WinIsWindowsVistaOrGreater()
|
|
? 0x70
|
|
: 0x14;
|
|
ADDRINT heapForceFlagsOffset = WinIsWindowsVistaOrGreater()
|
|
? 0x74
|
|
: 0x18;
|
|
#else
|
|
ADDRINT heapBaseOffset = WinIsNativeOs32()
|
|
? 0x18
|
|
: 0x1030;
|
|
ADDRINT heapFlagsOffset = WinIsWindowsVistaOrGreater()
|
|
? 0x40
|
|
: 0x0C;
|
|
ADDRINT heapForceFlagsOffset = WinIsWindowsVistaOrGreater()
|
|
? 0x44
|
|
: 0x10;
|
|
#endif
|
|
|
|
// Get Heap flags addresses (https://anti-debug.checkpoint.com/techniques/debug-flags.html#manual-checks-heap-flags)
|
|
if (PIN_SafeCopy(&heapBase, reinterpret_cast<VOID*>(m_pebAddr + heapBaseOffset), sizeof(heapBase)) != sizeof(heapBase)) {
|
|
return;
|
|
}
|
|
m_heapFlags = heapBase + heapFlagsOffset;
|
|
m_heapForceFlags = heapBase + heapForceFlagsOffset;
|
|
}
|
|
|
|
/* ==================================================================== */
|
|
// Add to monitored functions all the API needed for AntiDebug.
|
|
/* ==================================================================== */
|
|
|
|
BOOL AntiDbgWatch::Init()
|
|
{
|
|
funcToLink["IsDebuggerPresent"] = "https://anti-debug.checkpoint.com/techniques/debug-flags.html#using-win32-api-isdebuggerpresent";
|
|
funcToLink["CheckRemoteDebuggerPresent"] = "https://anti-debug.checkpoint.com/techniques/debug-flags.html#using-win32-api-checkremotedebuggerpresent";
|
|
funcToLink["RtlQueryProcessHeapInformation"] = "https://anti-debug.checkpoint.com/techniques/debug-flags.html#using-win32-api-checks-rtlqueryprocessheapinformation";
|
|
funcToLink["RtlQueryProcessDebugInformation"] = "https://anti-debug.checkpoint.com/techniques/debug-flags.html#using-win32-api-checks-rtlqueryprocessdebuginformation";
|
|
funcToLink["HeapWalk"] = "https://anti-debug.checkpoint.com/techniques/debug-flags.html#manual-checks-heap-protection";
|
|
funcToLink["CsrGetProcessId"] = "https://anti-debug.checkpoint.com/techniques/object-handles.html#openprocess";
|
|
funcToLink["SetUnhandledExceptionFilter"] = "https://anti-debug.checkpoint.com/techniques/exceptions.html#unhandledexceptionfilter";
|
|
funcToLink["RaiseException"] = "https://anti-debug.checkpoint.com/techniques/exceptions.html#raiseexception";
|
|
funcToLink["DebugActiveProcess"] = "https://anti-debug.checkpoint.com/techniques/interactive.html#self-debugging";
|
|
funcToLink["DbgUiDebugActiveProcess"] = "https://anti-debug.checkpoint.com/techniques/interactive.html#self-debugging";
|
|
funcToLink["NtDebugActiveProcess"] = "https://anti-debug.checkpoint.com/techniques/interactive.html#self-debugging";
|
|
funcToLink["GenerateConsoleCtrlEvent"] = "https://anti-debug.checkpoint.com/techniques/interactive.html#generateconsolectrlevent";
|
|
funcToLink["GetWindowTextA"] = "https://anti-debug.checkpoint.com/techniques/interactive.html#suspendthread";
|
|
funcToLink["GetWindowTextW"] = "https://anti-debug.checkpoint.com/techniques/interactive.html#suspendthread";
|
|
funcToLink["SwitchDesktop"] = "https://anti-debug.checkpoint.com/techniques/interactive.html#switchdesktop";
|
|
funcToLink["OutputDebugStringA"] = "https://anti-debug.checkpoint.com/techniques/interactive.html#outputdebugstring";
|
|
funcToLink["OutputDebugStringW"] = "https://anti-debug.checkpoint.com/techniques/interactive.html#outputdebugstring";
|
|
funcToLink["GetSystemTime"] = "https://anti-debug.checkpoint.com/techniques/timing.html#getsystemtime";
|
|
funcToLink["GetLocalTime"] = "https://anti-debug.checkpoint.com/techniques/timing.html#getlocaltime";
|
|
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("ntdll", "CsrGetProcessId", 0));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("ntdll", "RtlQueryProcessHeapInformation", 1));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("ntdll", "RtlQueryProcessDebugInformation", 3));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("ntdll", "DbgUiDebugActiveProcess", 1));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("ntdll", "NtQueryInformationProcess", 5, AntiDbg_NtQueryInformationProcess));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("ntdll", "NtQuerySystemInformation", 4, AntiDbg_NtQuerySystemInformation));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("ntdll", "NtDebugActiveProcess", 2));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("ntdll", "NtSetInformationThread", 4, AntiDbg_NtSetInformationThread));
|
|
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "LoadLibraryW", 1, AntiDbg_LoadLibrary));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "LoadLibraryA", 1, AntiDbg_LoadLibrary));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "CreateFileW", 5, AntiDbg_CreateFile));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "CreateFileA", 5, AntiDbg_CreateFile));
|
|
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "CloseHandle", 1, nullptr, AntiDbg_CloseHandle_after));
|
|
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "IsDebuggerPresent", 5));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "CheckRemoteDebuggerPresent", 5));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "HeapWalk", 5));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "SetUnhandledExceptionFilter", 5));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "RaiseException", 5));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "DebugActiveProcess", 5));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "GenerateConsoleCtrlEvent", 5));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "GetSystemTime", 1));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "GetLocalTime", 1));
|
|
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("user32", "BlockInput", 1, AntiDbg_BlockInput));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("user32", "SwitchDesktop", 1, AntiDbgLogFuncOccurrence));
|
|
|
|
////////////////////////////////////
|
|
// If AntiDebug level is Deep
|
|
////////////////////////////////////
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("ntdll", "NtQueryObject", 5, AntiDbg_NtQueryObject, nullptr, WATCH_DEEP));
|
|
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "OutputDebugStringA", 5, nullptr, nullptr, WATCH_DEEP));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("kernel32", "OutputDebugStringW", 5, nullptr, nullptr, WATCH_DEEP));
|
|
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("user32", "GetWindowTextA", 3, nullptr, nullptr, WATCH_DEEP));
|
|
watchedFuncs.appendFunc(EvasionFuncInfo("user32", "GetWindowTextW", 3, nullptr, nullptr, WATCH_DEEP));
|
|
|
|
isInit = TRUE;
|
|
return isInit;
|
|
}
|
|
|
|
namespace AntiDbg {
|
|
|
|
template <class TICK_T>
|
|
VOID _InstrumentGetTickCount(IMG Image, const char* fName, bool modify)
|
|
{
|
|
RTN funcRtn = find_by_unmangled_name(Image, fName);
|
|
if (RTN_Valid(funcRtn)) {
|
|
RTN_Open(funcRtn);
|
|
|
|
RTN_InsertCall(funcRtn, IPOINT_AFTER, (AFUNPTR)AntiDbg_GetTickCount_after<TICK_T>,
|
|
IARG_RETURN_IP,
|
|
IARG_THREAD_ID,
|
|
IARG_ADDRINT, fName,
|
|
IARG_BOOL, modify,
|
|
IARG_REG_REFERENCE,
|
|
REG_GAX,
|
|
IARG_END);
|
|
|
|
RTN_Close(funcRtn);
|
|
}
|
|
}
|
|
|
|
VOID InstrumentTimeChecks(IMG Image, t_watch_level maxLevel)
|
|
{
|
|
if (!IMG_Valid(Image)) return;
|
|
|
|
const std::string dllName = util::getDllName(IMG_Name(Image));
|
|
if (!util::iequals(dllName, "kernel32") && !util::iequals(dllName, "kernelbase")) {
|
|
return;
|
|
}
|
|
|
|
const bool modify = (maxLevel == t_watch_level::WATCH_DEEP) ? true : false;
|
|
|
|
_InstrumentGetTickCount<UINT32>(Image, "GetTickCount", modify);
|
|
_InstrumentGetTickCount<UINT64>(Image, "GetTickCount64", modify);
|
|
}
|
|
};
|
|
|
|
VOID AntiDbg::MonitorAntiDbgFunctions(IMG Image)
|
|
{
|
|
if (m_Settings.antidebug == WATCH_DISABLED) return;
|
|
|
|
m_AntiDbg.installCallbacks(Image, AntiDbgLogFuncOccurrence, m_Settings.antidebug);
|
|
AntiDbg::InstrumentTimeChecks(Image, m_Settings.antidebug);
|
|
}
|
|
|
|
VOID AntiDbg::MonitorSyscallEntry(const THREADID tid, const CHAR* name, const CONTEXT* ctxt, SYSCALL_STANDARD std, const ADDRINT Address)
|
|
{
|
|
EvasionFuncInfo* wfunc = m_AntiDbg.fetchSyscallFuncInfo(name, m_Settings.antidebug);
|
|
if (!wfunc) return;
|
|
|
|
EvasionWatchBeforeCallBack* callbackBefore = wfunc->callbackBefore;
|
|
if (!callbackBefore && !wfunc->callbackAfter) {
|
|
callbackBefore = AntiDbgLogFuncOccurrence;
|
|
}
|
|
if (!callbackBefore) return;
|
|
|
|
const size_t argCount = wfunc->paramCount;
|
|
const size_t args_max = 5;
|
|
VOID* syscall_args[args_max] = { 0 };
|
|
|
|
for (size_t i = 0; i < args_max; i++) {
|
|
if (i == argCount) break;
|
|
syscall_args[i] = reinterpret_cast<VOID*>(PIN_GetSyscallArgument(ctxt, std, i));
|
|
}
|
|
callbackBefore(Address,
|
|
tid,
|
|
name, argCount,
|
|
syscall_args[0],
|
|
syscall_args[1],
|
|
syscall_args[2],
|
|
syscall_args[3],
|
|
syscall_args[4]);
|
|
}
|