Mika Ayenson
56 lines
2.0 KiB
Python
56 lines
2.0 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="804463e7-b146-41ba-a757-d131d0a021ac",
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platforms=["windows"],
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endpoint=[
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{
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"rule_name": "Scheduled Task Creation via Microsoft Office",
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"rule_id": "f9fd002c-0dab-42ec-8675-0cf5af6b4a85",
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},
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{"rule_name": "Binary Masquerading via Untrusted Path", "rule_id": "35dedf0c-8db6-4d70-b2dc-a133b808211f"},
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{"rule_name": "Potential Masquerading as SVCHOST", "rule_id": "5b00c9ba-9546-47cc-8f9f-1c1a3e95f65c"},
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],
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siem=[],
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techniques=["T1036", "T1053", "T1566"],
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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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winword = "C:\\Users\\Public\\winword.exe"
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svchost = "C:\\Users\\Public\\svchost.exe"
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user32 = "C:\\Windows\\System32\\user32.dll"
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dll = "C:\\Users\\Public\\taskschd.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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task = "C:\\Windows\\System32\\Tasks\\a.xml"
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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.copy_file(EXE_FILE, winword)
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common.copy_file(EXE_FILE, svchost)
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common.log("Modifying the OriginalFileName")
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common.execute([rcedit, dll, "--set-version-string", "OriginalFilename", "taskschd.dll"])
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common.log("Loading taskschd.dll")
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common.execute([winword, "-c", f"Import-Module {ps1}; Invoke-ImageLoad {dll}"], timeout=10)
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common.execute([svchost, "-c", f"New-Item -Path {task} -Type File"], timeout=10)
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common.remove_files(dll, ps1, rcedit, task, winword, svchost)
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if __name__ == "__main__":
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exit(main())
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