Mika Ayenson
52 lines
1.6 KiB
Python
52 lines
1.6 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="ab957b94-2c39-49dd-93cf-f1e40394ff1b",
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platforms=["windows"],
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endpoint=[
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{
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"rule_name": "UAC Bypass Attempt via WOW64 Logger DLL Side-Loading",
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"rule_id": "28a39a43-e850-4941-8605-ffa23dcfd25a",
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}
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],
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siem=[],
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techniques=["T1574", "T1548"],
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)
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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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powershell = "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe"
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user32 = "C:\\Windows\\System32\\user32.dll"
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dll = "C:\\Users\\Public\\wow64log.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(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", "wow64log.dll"])
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common.log("Loading wow64log.dll and spawning a high integrity process")
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common.execute(
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[powershell, "-c", f"Import-Module {ps1}; Invoke-ImageLoad {dll}; powershell"],
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timeout=10,
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)
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common.remove_files(dll, ps1, rcedit)
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if __name__ == "__main__":
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exit(main())
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