Mika Ayenson
80 lines
2.2 KiB
Python
80 lines
2.2 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: WerFault.exe Persistence
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# RTA: werfault_persistence.py
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# signal.rule.name: Process Potentially Masquerading as WerFault
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# ATT&CK: T1112
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# Description: Sets an executable to run when WerFault is run with -rp flags and runs it
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import time
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from . import common
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from . import RtaMetadata
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MY_APP = common.get_path("bin", "myapp.exe")
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metadata = RtaMetadata(
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uuid="cbd90dde-02f4-4010-b654-ccabff3c3c73",
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platforms=["windows"],
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endpoint=[],
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siem=[{"rule_id": "ac5012b8-8da8-440b-aaaf-aedafdea2dff", "rule_name": "Suspicious WerFault Child Process"}],
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techniques=["T1036"],
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)
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@common.requires_os(metadata.platforms)
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@common.dependencies(MY_APP)
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def main():
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reg_key = "'HKLM:\\SOFTWARE\\Microsoft\\Windows\\Windows Error Reporting\\hangs'"
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reg_name = "ReflectDebugger"
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commands = ["C:\\Windows\\system32\\calc.exe", "'powershell -c calc.exe'", MY_APP]
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for command in commands:
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common.log("Setting WerFault reg key to {}".format(command))
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common.execute(
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[
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"powershell",
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"-c",
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"New-ItemProperty",
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"-Path",
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reg_key,
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"-Name",
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reg_name,
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"-Value",
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command,
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],
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wait=False,
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)
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time.sleep(1)
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common.log("Running WerFault.exe -pr 1")
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common.execute(["werfault", "-pr", "1"], wait=False)
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time.sleep(2.5)
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common.execute(
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[
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"powershell",
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"-c",
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"Remove-ItemProperty",
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"-Path",
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reg_key,
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"-Name",
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reg_name,
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]
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)
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common.log("Cleaning up")
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common.execute(["taskkill", "/F", "/im", "calc.exe"])
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common.execute(["taskkill", "/F", "/im", "calculator.exe"])
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common.execute(["taskkill", "/F", "/im", "myapp.exe"])
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if __name__ == "__main__":
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exit(main())
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