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Backdoor.Win32.Agent.cu MVID-2021-0304 Man-In-The-Middle

Backdoor.Win32.Agent.cu MVID-2021-0304 Man-In-The-Middle
Posted Jul 26, 2021
Authored by malvuln | Site malvuln.com

Backdoor.Win32.Agent.cu malware suffers from a man-in-the-middle vulnerability.

tags | exploit
systems | windows
SHA-256 | bfc8d46b65dccc55f4aa9b62ef7da9aa24b50f4baaf5e68e09810c2405eccc91

Backdoor.Win32.Agent.cu MVID-2021-0304 Man-In-The-Middle

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Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/ce1963d3fd6a8e1383aac40a1f1c4107_B.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Agent.cu
Vulnerability: Port Bounce Scan (MITM)
Description: The malware listens on TCP ports 10426, 56185, its FTP component accepts any username/password credentials. Third-party attackers 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: ce1963d3fd6a8e1383aac40a1f1c4107
Vuln ID: MVID-2021-0304
Dropped files: MsgNet32.exe
Disclosure: 07/26/2021

Exploit/PoC:
nmap -n -Pn -b mal:vuln@192.168.18.129:56185 -p21,22,80 192.168.18.131
Starting Nmap 7.80 ( https://nmap.org ) at 2021-07-22 19:50 Pacific Daylight Time
Nmap scan report for 192.168.18.131
Host is up.

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

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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