eric-forte-elastic
48 lines
1.7 KiB
Python
48 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 pathlib import Path
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from . import RtaMetadata, common
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metadata = RtaMetadata(
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uuid="bbad34f5-3542-4484-9b23-5ef05af94c0f",
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platforms=["windows"],
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endpoint=[{'rule_id': '08fba401-b76f-4c7b-9a88-4f3b17fe00c1', 'rule_name': 'DLL Loaded from an Archive File'}],
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siem=[],
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techniques=['T1204', 'T1204.002', 'T1574', 'T1574.002'],
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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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path = "C:\\Users\\Public\\Temp\\7z\\"
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Path(path).mkdir(parents=True, exist_ok=True)
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file = "C:\\Users\\Public\\Temp\\7z\\file.exe"
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user32 = "C:\\Windows\\System32\\user32.dll"
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dll = "C:\\Users\\Public\\Temp\\7z\\unsigned.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(user32, dll)
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common.copy_file(EXE_FILE, file)
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common.copy_file(PS1_FILE, ps1)
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common.copy_file(RENAMER, rcedit)
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common.log("Modifying the OriginalFileName attribute to invalidate the signature")
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common.execute([rcedit, dll, "--set-version-string", "OriginalFilename", "unsigned.dll"])
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common.log("Loading unsigned DLL into fake taskhost")
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common.execute([file, "-c", f"Import-Module {ps1}; Invoke-ImageLoad {dll}"], timeout=10)
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common.remove_files(dll, ps1, rcedit, file)
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if __name__ == "__main__":
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exit(main())
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