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

48 lines
1.6 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="d4b4f924-974b-4033-9728-bb6a736bf7ef",
platforms=["windows"],
endpoint=[],
siem=[{
'rule_id': '9d110cb3-5f4b-4c9a-b9f5-53f0a1707ae5',
'rule_name': 'Potential Credential Access via Trusted Developer Utility'
}],
techniques=['T1003'],
)
EXE_FILE = common.get_path("bin", "renamed_posh.exe")
PS1_FILE = common.get_path("bin", "Invoke-ImageLoad.ps1")
RENAMER = common.get_path("bin", "rcedit-x64.exe")
@common.requires_os(*metadata.platforms)
def main():
msbuild = "C:\\Users\\Public\\msbuild.exe"
user32 = "C:\\Windows\\System32\\user32.dll"
dll = "C:\\Users\\Public\\vaultcli.dll"
ps1 = "C:\\Users\\Public\\Invoke-ImageLoad.ps1"
rcedit = "C:\\Users\\Public\\rcedit.exe"
common.copy_file(user32, dll)
common.copy_file(EXE_FILE, msbuild)
common.copy_file(PS1_FILE, ps1)
common.copy_file(RENAMER, rcedit)
common.log("Modifying the OriginalFileName attribute")
common.execute([rcedit, dll, "--set-version-string", "OriginalFilename", "vaultcli.dll"])
common.log("Loading System.DirectoryServices.Protocols.test.dll")
common.execute([msbuild, "-c", f"Import-Module {ps1}; Invoke-ImageLoad {dll}"], timeout=10)
common.remove_files(dll, ps1, rcedit, msbuild)
if __name__ == "__main__":
exit(main())