protections machine
6a76bbb8d2
Co-authored-by: shashank-elastic <91139415+shashank-elastic@users.noreply.github.com>
54 lines
1.5 KiB
Python
54 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="a1286125-bf4b-40bb-819a-b7c5de83fafb",
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platforms=["linux"],
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endpoint=[
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{
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"rule_name": "Potential Persistence via Direct Crontab Modification",
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"rule_id": "b3bcbab6-e216-4d70-bdee-2b69affbb386",
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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 script
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rta_script = "/dev/shm/rta"
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# Create fake executable
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masquerade = "/tmp/crontab"
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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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common.execute(["chmod", "+x", masquerade])
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# Create a fake script that executes the fake binary
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with Path(rta_script).open("w", encoding="utf-8") as script:
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script.write("#!/bin/bash\n")
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script.write("/tmp/crontab -\n")
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# Make the script executable
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common.execute(["chmod", "+x", rta_script])
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# Execute the fake script
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common.log("Launching fake script")
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common.execute([rta_script], timeout=5, kill=True, shell=True) # noqa: S604
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# Cleanup
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common.remove_file(rta_script)
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common.remove_file(masquerade)
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if __name__ == "__main__":
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sys.exit(main())
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