Justin Ibarra
36 lines
1.1 KiB
Python
36 lines
1.1 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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# you may not use this file except in compliance with the Elastic License.
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# Name: RunDLL32 Javascript Callback
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# RTA: rundll32_javascript_callback.py
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# signal.rule.name: Local Service Commands
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# signal.rule.name: Potential Modification of Accessibility Binaries
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# ATT&CK: T1085
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# Description: Executes javascript code with an AJAX call via RunDll32.exe
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from . import common
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@common.requires_os(common.WINDOWS)
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def main():
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common.log("RunDLL32 with Javascript Callback")
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server, ip, port = common.serve_web()
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common.clear_web_cache()
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url = "http://%s:%d" % (ip, port)
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rundll32 = 'rundll32.exe'
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js = """
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'javascript:"\..\mshtml,RunHTMLApplication ";'
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'var%20xhr=new%20ActiveXObject("Msxml2.XMLHttp.6.0");,'
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'xhr.open("GET", "{url}",false);xhr.send();'
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""".format(url=url)
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packed_js = ''.join(s.strip() for s in js.splitlines())
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common.execute([rundll32, packed_js])
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server.shutdown()
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if __name__ == "__main__":
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exit(main())
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