Mika Ayenson
50 lines
1.5 KiB
Python
50 lines
1.5 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="9d5af763-b3f9-4b89-96b6-16e0210f9755",
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platforms=["windows"],
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endpoint=[
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{
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"rule_name": "Network Connection via Process with Unusual Arguments",
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"rule_id": "95601d8b-b969-4189-9744-090140ae29e6",
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},
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{
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"rule_name": "Untrusted File Execution via Microsoft Office",
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"rule_id": "bb23a662-2d75-4714-837d-4ec9c2e772a5",
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},
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{"rule_name": "RunDLL32/Regsvr32 Loads Dropped Executable", "rule_id": "901f0c30-a7c5-40a5-80e3-a50c6744632f"},
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],
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siem=[],
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techniques=["T1218", "T1036", "T1055", "T1566", "T1059"],
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)
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EXE_FILE = common.get_path("bin", "regsvr32.exe")
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EXE_FILE2 = common.get_path("bin", "renamed.exe")
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@common.requires_os(metadata.platforms)
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def main():
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binary = "winword.exe"
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common.copy_file(EXE_FILE2, binary)
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# Execute command
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fake_regsvr = "C:\\Users\\Public\\regsvr32.exe"
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common.log("Dropping executable using fake winword")
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common.execute([binary, "/c", f"copy {EXE_FILE} {fake_regsvr}"])
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common.log("Executing it to create an untrusted child process")
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common.execute([binary, "/c", fake_regsvr])
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common.remove_files(binary, fake_regsvr)
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if __name__ == "__main__":
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exit(main())
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