diff --git a/rta/linux_systemd_executing_sus_located_binary.py b/rta/linux_systemd_executing_sus_located_binary.py new file mode 100644 index 000000000..0cfcc4a4f --- /dev/null +++ b/rta/linux_systemd_executing_sus_located_binary.py @@ -0,0 +1,51 @@ +# Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one +# or more contributor license agreements. Licensed under the Elastic License +# 2.0; you may not use this file except in compliance with the Elastic License +# 2.0. + +from . import common +from . import RtaMetadata + +metadata = RtaMetadata( + uuid="5b277316-4584-4e4f-8a71-6c7d833e2c30", + platforms=["linux"], + endpoint=[ + { + "rule_name": "Scheduled Job Executing Binary in Unusual Location", + "rule_id": "f2a52d42-2410-468b-9910-26823c6ef822" + } + ], + techniques=["T1543", "T1053"], +) + + +@common.requires_os(*metadata.platforms) +def main(): + + # Path for the fake systemd script + fake_systemd = "/tmp/systemd" + + # Create fake sh executable + masquerade = "/tmp/sh" + source = common.get_path("bin", "linux.ditto_and_spawn") + common.copy_file(source, masquerade) + + # Create a fake systemd script that launches sh + with open(fake_systemd, 'w') as script: + script.write('#!/bin/bash\n') + script.write('/tmp/sh\n') + + # Make the script executable + common.execute(['chmod', '+x', fake_systemd]) + common.execute(['chmod', '+x', masquerade]) + + # Execute the fake systemd script + common.log("Launching a shell that executes a payload as a child of fake systemd") + common.execute([fake_systemd], timeout=5, kill=True, shell=True) + + # Cleanup + common.remove_file(fake_systemd) + + +if __name__ == "__main__": + exit(main())