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under the clr program, the module order is not fixed #7

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Merged
NytroRST merged 1 commit into from
Sep 1, 2024
Merged

under the clr program, the module order is not fixed #7

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29 changes: 27 additions & 2 deletions ShellcodeCompiler/ASMHeader.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -22,9 +22,22 @@ string ASMHeader::GetASMHeader_x86()
"mov eax, [eax + 0xc] ; EAX = PEB->Ldr \r\n"
"mov esi, [eax + 0x14] ; ESI = PEB->Ldr.InMemOrder \r\n"
"lodsd ; EAX = Second module \r\n"

"Next_Module: \r\n\r\n"

"xchg eax, esi ; EAX = ESI, ESI = EAX \r\n"
"lodsd ; EAX = Third(kernel32) \r\n"
"lodsd ; EAX = Next module \r\n"
"mov ecx, [eax + 0x28] ; ECX = Module Name \r\n"
"cmp dword [ecx], 0x45004b ; KE \r\n"
"jne Next_Module \r\n"
"cmp dword [ecx + 0x4], 0x4e0052 ; RN \r\n"
"jne Next_Module \r\n"
"cmp dword [ecx + 0x8], 0x4c0045 ; EL \r\n"
"jne Next_Module \r\n"
"cmp dword [ecx + 0xc], 0x320033 ; 32 \r\n"
"jne Next_Module \r\n"
"mov ebx, [eax + 0x10] ; EBX = Base address \r\n"

"mov edx, [ebx + 0x3c] ; EDX = DOS->e_lfanew \r\n"
"add edx, ebx ; EDX = PE Header \r\n"
"mov edx, [edx + 0x78] ; EDX = Offset export table \r\n"
Expand Down Expand Up @@ -87,8 +100,20 @@ string ASMHeader::GetASMHeader_x64()
"mov rax, [rax + 0x18] ; RAX = PEB->Ldr \r\n"
"mov rsi, [rax + 0x20] ; RSI = PEB->Ldr.InMemOrder \r\n"
"lodsq ; RAX = Second module \r\n"

"Next_Module: \r\n\r\n"

"xchg rax, rsi ; RAX = RSI, RSI = RAX \r\n"
"lodsq ; RAX = Third(kernel32) \r\n"
"lodsq ; RAX = Next Module \r\n"
"mov rcx, [rax + 0x50] ; RCX = Module Name \r\n"
"cmp dword [rcx], 0x45004b ; KE \r\n"
"jne Next_Module \r\n"
"cmp dword [rcx + 0x4], 0x4e0052 ; RN \r\n"
"jne Next_Module \r\n"
"cmp dword [rcx + 0x8], 0x4c0045 ; EL \r\n"
"jne Next_Module \r\n"
"cmp dword [rcx + 0xc], 0x320033 ; 32 \r\n"
"jne Next_Module \r\n"
"mov rbx, [rax + 0x20] ; RBX = Base address \r\n\r\n"

"xor r8, r8 ; Clear r8 \r\n"
Expand Down