Files
sigma-rules/rta/msequationeditor_file_written_exec.py
T
2023-10-03 10:47:58 -04:00

48 lines
1.5 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.
from . import common
from . import RtaMetadata
metadata = RtaMetadata(
uuid="a0b7435a-1f48-4fae-b3dc-c596dc70490d",
platforms=["windows"],
endpoint=[
{
"rule_name": "Execution of File Written or Modified by Microsoft Equation Editor",
"rule_id": "8bc4f22c-9bb1-4c76-a7b6-195bee3579db",
},
{"rule_name": "Microsoft Equation Editor Child Process", "rule_id": "60eb5960-b26e-494a-8cf2-35ab5939f6c1"},
],
siem=[],
techniques=["T1203", "T1566"],
)
EXE_FILE = common.get_path("bin", "renamed_posh.exe")
@common.requires_os(*metadata.platforms)
def main():
server, ip, port = common.serve_web()
url = f"http://{ip}:{port}/bin/renamed_posh.exe"
eqnedt32 = "C:\\Users\\Public\\eqnedt32.exe"
dropped = "C:\\Users\\Public\\posh.exe"
common.copy_file(EXE_FILE, eqnedt32)
cmd = f"Invoke-WebRequest -Uri {url} -OutFile {dropped}"
# Execute command
common.log("Using a fake eqnedt32 to drop and execute an .exe")
common.execute([eqnedt32, "/c", cmd], timeout=10)
common.execute([eqnedt32, "/c", dropped], timeout=10, kill=True)
common.remove_file(eqnedt32)
common.remove_file(dropped)
if __name__ == "__main__":
exit(main())