Files
sigma-rules/rta/linux_execution_renice_ulimit.py
T
2024-10-24 21:38:49 +05:30

47 lines
1.3 KiB
Python

# 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.
import sys
from . import RtaMetadata, common
metadata = RtaMetadata(
uuid="9e7ec69a-50cb-4bce-8ace-50e4e6f0199d",
platforms=["linux"],
endpoint=[
{
"rule_name": "Renice or Ulimit Execution",
"rule_id": "57ed0e43-643a-47f3-936e-138dc6f480da",
},
],
techniques=["T1059"],
)
@common.requires_os(*metadata.platforms)
def main() -> None:
common.log("Creating a fake executable..")
masquerade = "/dev/shm/evil"
source = common.get_path("bin", "netcon_exec_chain.elf")
common.copy_file(source, masquerade)
common.execute(["chmod", "+x", masquerade])
masquerade2 = "/dev/shm/renice"
common.copy_file(source, masquerade2)
common.log("Granting execute permissions...")
common.execute(["chmod", "+x", masquerade2])
commands = [masquerade, "exec", "-c", "/dev/shm/renice"]
common.execute([*commands], timeout=5, kill=True)
common.log("Cleaning...")
common.remove_file(masquerade)
common.remove_file(masquerade2)
common.log("Simulation successfull!")
if __name__ == "__main__":
sys.exit(main())