Optimize assembly payloads

2023-06-26 12:25:44 +03:00
parent 851ebb5b9a
commit 33f7dd89a9
2 changed files with 5 additions and 16 deletions
--- a/injector/src/launcher_p.asm
+++ b/injector/src/launcher_p.asm
@ -2,8 +2,6 @@ BITS 64

 main: ; Replacement entry point
    push rsi
-    push rdi
-    sub rsp, 8h


    call GetKernel32ModuleHandle
@ -11,20 +9,16 @@ main: ; Replacement entry point

    mov rcx, rax
    call GetAddressOf_GetProcAddress
-    mov rdi, rax          ; *GetProcAddress


    mov rcx, rsi          ; kernel32.dll
    lea rdx, [rel s_LoadLibraryA]
-    mov rax, rdi          ; *GetProcAddress
    call rax              ; rax = *LoadLibraryA

    lea rcx, [rel dllPath]
    call rax              ; LoadLibraryA(dllPath)


-    add rsp, 8h
-    pop rdi
    pop rsi
    ret