Eric Forte
50 lines
1.8 KiB
Python
50 lines
1.8 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 os
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import pathlib
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import sys
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from . import RtaMetadata, common
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metadata = RtaMetadata(
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uuid="884ae75b-d9ed-448c-9267-fb470fffb249",
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platforms=["linux"],
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endpoint=[{"rule_id": "753f83ff-437b-4952-8612-07e3c1327daf", "rule_name": "Potential Shell via Web Server"}],
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siem=[],
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techniques=["T1505", "T1505.003"],
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)
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@common.requires_os(*metadata.platforms)
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def main() -> None:
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masquerade = "/tmp/httpd"
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masquerade2 = "/tmp/bash"
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# used only for linux at 2 places to enumerate xargs as parent process.
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working_dir = "/tmp/fake_folder/httpd"
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# Using the Linux binary that simulates parent-> child process in Linux
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source = common.get_path("bin", "linux_ditto_and_spawn_parent_child")
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common.copy_file(source, masquerade)
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common.copy_file(source, masquerade2)
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# In linux the working directory is being projected as parent process.
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# Hence, to simulate the parent process without many changes to execute logic
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# a fake folder structure is created for execution.
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# The execution working directory is changed to the fake folder, to simulate as xargs parent process in Linux.
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pathlib.Path(working_dir).mkdir(parents=True, exist_ok=True)
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os.chdir(working_dir)
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# Execute command
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common.log("Launching fake commands for potential shell via webserver")
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command = f"{masquerade2} pwd"
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common.execute([masquerade, "childprocess", command], timeout=10, kill=True, shell=True) # noqa: S604
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# cleanup
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common.remove_file(masquerade)
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common.remove_file(masquerade2)
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common.remove_directory(working_dir)
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if __name__ == "__main__":
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sys.exit(main())
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