Justin Ibarra
59 lines
1.9 KiB
Python
59 lines
1.9 KiB
Python
# Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
|
|
# or more contributor license agreements. Licensed under the Elastic License
|
|
# 2.0; you may not use this file except in compliance with the Elastic License
|
|
# 2.0.
|
|
|
|
# Name: Network Traffic from InstallUtil
|
|
# RTA: installutil_network.py
|
|
# ATT&CK: T1118
|
|
# Elastic detection: InstallUtil Process Making Network Connections
|
|
# Elastic detection: Unusual Network Activity from a Windows System Binary
|
|
# Description: Uses mock .NET malware and InstallUtil to create network activity from InstallUtil.
|
|
|
|
import os
|
|
import sys
|
|
|
|
from . import common
|
|
|
|
MY_DOT_NET = common.get_path("bin", "mydotnet.exe")
|
|
|
|
|
|
@common.requires_os(common.WINDOWS)
|
|
@common.dependencies(MY_DOT_NET)
|
|
def main():
|
|
server, ip, port = common.serve_web()
|
|
common.clear_web_cache()
|
|
|
|
target_app = "mydotnet.exe"
|
|
common.patch_file(MY_DOT_NET, common.wchar(":8000"), common.wchar(":%d" % port), target_file=target_app)
|
|
|
|
install_util64 = "C:\\Windows\\Microsoft.NET\\Framework64\\v4.0.30319\\InstallUtil.exe"
|
|
install_util86 = "C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\InstallUtil.exe"
|
|
fallback = False
|
|
|
|
if os.path.exists(install_util64):
|
|
install_util = install_util64
|
|
elif os.path.exists(install_util86):
|
|
install_util = install_util86
|
|
else:
|
|
install_util = None
|
|
fallback = True
|
|
|
|
if not fallback:
|
|
common.clear_web_cache()
|
|
common.execute([install_util, '/logfile=', '/LogToConsole=False', '/U', target_app])
|
|
|
|
else:
|
|
common.log("Unable to find InstallUtil, creating temp file")
|
|
install_util = os.path.abspath("InstallUtil.exe")
|
|
common.copy_file(sys.executable, install_util)
|
|
common.execute([install_util, "-c", "import urllib; urllib.urlopen('http://%s:%d')" % (common.get_ip(), port)])
|
|
common.remove_file(install_util)
|
|
|
|
common.remove_file(target_app)
|
|
server.shutdown()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
exit(main())
|