eric-forte-elastic
50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
# Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
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# or more contributor license agreements. Licensed under the Elastic License
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# 2.0; you may not use this file except in compliance with the Elastic License
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# 2.0.
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from . import common
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from . import RtaMetadata
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metadata = RtaMetadata(
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uuid="cd549ba9-63be-4eff-ab6c-f567445e1977",
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platforms=["windows"],
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endpoint=[
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{"rule_name": "Execution from Unusual Directory", "rule_id": "16c84e67-e5e7-44ff-aefa-4d771bcafc0c"},
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{"rule_name": "Script Execution via MSXSL", "rule_id": "de3615bc-4e50-485e-b3b5-8548ef6faa3d"},
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],
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siem=[],
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techniques=["T1220", "T1218", "T1059"],
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)
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EXE_FILE = common.get_path("bin", "renamed_posh.exe")
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PS1_FILE = common.get_path("bin", "Invoke-ImageLoad.ps1")
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RENAMER = common.get_path("bin", "rcedit-x64.exe")
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@common.requires_os(*metadata.platforms)
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def main():
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msxsl = "C:\\Users\\Public\\msxsl.exe"
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user32 = "C:\\Windows\\System32\\user32.dll"
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dll = "C:\\Users\\Public\\scrobj.dll"
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ps1 = "C:\\Users\\Public\\Invoke-ImageLoad.ps1"
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rcedit = "C:\\Users\\Public\\rcedit.exe"
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common.copy_file(EXE_FILE, msxsl)
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common.copy_file(user32, dll)
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common.copy_file(PS1_FILE, ps1)
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common.copy_file(RENAMER, rcedit)
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# Execute command
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common.log("Modifying the OriginalFileName attribute")
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common.execute([rcedit, msxsl, "--set-version-string", "OriginalFilename", "msxsl.exe"])
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common.log("Loading scrobj.dll into fake msxsl")
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common.execute([msxsl, "-c", f"Import-Module {ps1}; Invoke-ImageLoad {dll}"], timeout=10)
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common.remove_files(msxsl, dll, ps1, rcedit)
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if __name__ == "__main__":
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exit(main())
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