protections machine
52 lines
1.5 KiB
Python
52 lines
1.5 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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import sys
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from pathlib import Path
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from . import RtaMetadata, common
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metadata = RtaMetadata(
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uuid="c2b89791-5c51-4965-a440-cd9905bfbe55",
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platforms=["linux"],
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endpoint=[
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{
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"rule_name": "Hidden Payload Executed via Cron",
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"rule_id": "e8b2afe5-37a9-468c-a6fb-f178d46cb698",
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},
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],
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techniques=["T1053"],
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)
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@common.requires_os(*metadata.platforms)
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def main() -> None:
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# Path for the fake cron script
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fake_cron = "/tmp/cron"
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# Create fake sh executable
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masquerade = "/tmp/sh"
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source = common.get_path("bin", "linux.ditto_and_spawn")
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common.copy_file(source, masquerade)
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# Create a fake cron script that launches sh
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with Path(fake_cron).open("w", encoding="utf-8") as script:
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script.write("#!/bin/bash\n")
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script.write("/tmp/sh -c '/dev/shm/.foo'\n")
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# Make the script executable
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common.execute(["chmod", "+x", fake_cron])
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# Execute the fake cron script
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common.log("Launching a shell that executes a hidden payload as a child of fake cron")
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common.execute([fake_cron], timeout=5, kill=True, shell=True) # noqa: S604
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# Cleanup
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common.remove_file(fake_cron)
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if __name__ == "__main__":
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sys.exit(main())
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