Justin Ibarra
44 lines
1.4 KiB
Python
44 lines
1.4 KiB
Python
# Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
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# or more contributor license agreements. Licensed under the Elastic License
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# 2.0; you may not use this file except in compliance with the Elastic License
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# 2.0.
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# Name: RunDll32 with .inf Callback
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# RTA: rundll32_inf_callback.py
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# signal.rule.name: Local Service Commands
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# signal.rule.name: Potential Modification of Accessibility Binaries
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# ATT&CK: T1105
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# Description: Loads RunDll32 with a suspicious .inf file that makes a local http GET
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import time
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from . import common
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INF_FILE = common.get_path("bin", "script_launch.inf")
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@common.requires_os(common.WINDOWS)
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@common.dependencies(INF_FILE)
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def main():
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# http server will terminate on main thread exit
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# if daemon is True
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common.log("RunDLL32 with Script Object and Network Callback")
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server, ip, port = common.serve_web()
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callback = "http://%s:%d" % (ip, port)
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common.clear_web_cache()
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common.patch_regex(INF_FILE, common.CALLBACK_REGEX, callback)
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rundll32 = "rundll32.exe"
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dll_entrypoint = "setupapi.dll,InstallHinfSection"
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common.execute([rundll32, dll_entrypoint, "DefaultInstall", "128", INF_FILE], shell=False)
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time.sleep(1)
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common.log("Cleanup", log_type="-")
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common.execute(["taskkill", "/f", "/im", "notepad.exe"])
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server.shutdown()
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if __name__ == "__main__":
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exit(main())
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