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

46 lines
1.4 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="b9d5427a-33c4-4b1d-838d-f47c5f3b0b43",
platforms=["windows"],
endpoint=[
{"rule_name": "Binary Masquerading via Untrusted Path", "rule_id": "35dedf0c-8db6-4d70-b2dc-a133b808211f"},
{"rule_name": "Suspicious WMIC XSL Script Execution", "rule_id": "18371ec4-ee2f-465b-8757-ee726914006c"},
],
siem=[],
techniques=["T1220", "T1047", "T1036"],
)
EXE_FILE = common.get_path("bin", "renamed_posh.exe")
PS1_FILE = common.get_path("bin", "Invoke-ImageLoad.ps1")
@common.requires_os(*metadata.platforms)
def main():
wmic = "C:\\Users\\Public\\wmic.exe"
user32 = "C:\\Windows\\System32\\user32.dll"
dll = "C:\\Users\\Public\\jscript.dll"
ps1 = "C:\\Users\\Public\\Invoke-ImageLoad.ps1"
common.copy_file(EXE_FILE, wmic)
common.copy_file(user32, dll)
common.copy_file(PS1_FILE, ps1)
common.log("Loading jscript.dll into fake wmic")
common.execute(
[wmic, "-c", f"Import-Module {ps1}; Invoke-ImageLoad {dll}; echo /format:"],
timeout=10,
)
common.remove_files(wmic, dll, ps1)
if __name__ == "__main__":
exit(main())