62 lines
1.1 KiB
PHP
62 lines
1.1 KiB
PHP
|
BITS 64
|
||
|
|
|
||
|
|
; https://dennisbabkin.com/blog/?t=how-to-implement-getprocaddress-in-shellcode
|
||
|
|
GetKernel32ModuleHandle:
|
||
|
|
mov rax, gs:[60h]
|
||
|
|
mov rax, [rax + 18h]
|
||
|
|
mov rax, [rax + 20h]
|
||
|
|
mov rax, [rax]
|
||
|
|
mov rax, [rax]
|
||
|
|
mov rax, [rax + 20h]
|
||
|
|
ret
|
||
|
|
|
||
|
|
|
||
|
|
GetAddressOf_GetProcAddress:
|
||
|
|
mov eax, [rcx + 3ch]
|
||
|
|
add rax, rcx
|
||
|
|
lea rax, [rax + 88h]
|
||
|
|
|
||
|
|
mov edx, [rax]
|
||
|
|
lea rax, [rcx + rdx]
|
||
|
|
|
||
|
|
mov edx, [rax + 18h]
|
||
|
|
mov r8d, [rax + 20h]
|
||
|
|
lea r8, [rcx + r8]
|
||
|
|
|
||
|
|
mov r10, 41636f7250746547h ; "GetProcA"
|
||
|
|
mov r11, 0073736572646441h ; "Address\0"
|
||
|
|
|
||
|
|
.1:
|
||
|
|
mov r9d, [r8]
|
||
|
|
lea r9, [rcx + r9]
|
||
|
|
|
||
|
|
; Function name comparision
|
||
|
|
cmp r10, [r9]
|
||
|
|
jnz .2
|
||
|
|
cmp r11, [r9 + 7]
|
||
|
|
jnz .2
|
||
|
|
|
||
|
|
; Found GetProcAddress
|
||
|
|
neg rdx
|
||
|
|
mov r10d, [rax + 18h]
|
||
|
|
lea rdx, [r10 + rdx]
|
||
|
|
|
||
|
|
mov r10d, [rax + 24h]
|
||
|
|
lea r10, [rcx + r10]
|
||
|
|
movzx rdx, word [r10 + rdx * 2]
|
||
|
|
|
||
|
|
mov r10d, [rax + 1ch]
|
||
|
|
lea r10, [rcx + r10]
|
||
|
|
|
||
|
|
mov r10d, [r10 + rdx * 4]
|
||
|
|
|
||
|
|
lea rax, [rcx + r10] ; Function address
|
||
|
|
jmp .end
|
||
|
|
|
||
|
|
.2:
|
||
|
|
add r8, 4
|
||
|
|
dec rdx
|
||
|
|
jnz .1
|
||
|
|
|
||
|
|
.end:
|
||
|
|
ret
|