Mika Ayenson
55 lines
1.6 KiB
Python
55 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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# Name: MsBuild with Network Activity
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# RTA: msbuild_network.py
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# ATT&CK: T1127
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# signal.rule.name: Microsoft Build Engine Started an Unusual Process
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# signal.rule.name: Trusted Developer Application Usage
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# Description: Generates network traffic from msbuild.exe
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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="022dc249-a496-413a-9355-c37e3ea41dda",
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platforms=["windows"],
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endpoint=[],
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siem=[
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{
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"rule_id": "9d110cb3-5f4b-4c9a-b9f5-53f0a1707ae6",
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"rule_name": "Microsoft Build Engine Started an Unusual Process",
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}
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],
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techniques=["T1027"],
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)
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MS_BUILD = "C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\msbuild.exe"
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@common.requires_os(metadata.platforms)
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@common.dependencies(MS_BUILD)
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def main():
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common.log("MsBuild Beacon")
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server, ip, port = common.serve_web()
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common.clear_web_cache()
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common.log("Updating the callback http://%s:%d" % (ip, port))
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target_task = "tmp-file.csproj"
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common.copy_file(common.get_path("bin", "BadTasks.csproj"), target_task)
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new_callback = "http://%s:%d" % (ip, port)
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common.patch_regex(target_task, common.CALLBACK_REGEX, new_callback)
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common.execute([MS_BUILD, target_task], timeout=30, kill=True)
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common.remove_file(target_task)
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server.shutdown()
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if __name__ == "__main__":
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exit(main())
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