Ross Wolf
5fcece8416
Co-Authored-By: Brent Murphy <56412096+bm11100@users.noreply.github.com> Co-Authored-By: Craig Chamberlain <randomuserid@users.noreply.github.com> Co-Authored-By: David French <56409778+threat-punter@users.noreply.github.com> Co-Authored-By: Derek Ditch <dcode@users.noreply.github.com> Co-Authored-By: Justin Ibarra <brokensound77@users.noreply.github.com>
47 lines
1.3 KiB
TOML
47 lines
1.3 KiB
TOML
[metadata]
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creation_date = "2020/02/18"
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ecs_version = ["1.4.0"]
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maturity = "production"
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updated_date = "2020/02/18"
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[rule]
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author = ["Elastic"]
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description = "A request to a web application server contained no identifying user agent string."
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false_positives = [
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"""
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Some normal applications and scripts may contain no user agent. Most legitimate web requests from the Internet
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contain a user agent string. Requests from web browsers almost always contain a user agent string. If the source is
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unexpected, the user unauthorized, or the request unusual, these may indicate suspicious or malicious activity.
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""",
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]
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index = ["apm-*-transaction*"]
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language = "kuery"
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license = "Elastic License"
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name = "Web Application Suspicious Activity: No User Agent"
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references = ["https://en.wikipedia.org/wiki/User_agent"]
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risk_score = 47
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rule_id = "43303fd4-4839-4e48-b2b2-803ab060758d"
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severity = "medium"
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tags = ["APM", "Elastic"]
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type = "query"
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query = '''
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url.path:*
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'''
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[[rule.filters]]
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[rule.filters."$state"]
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store = "appState"
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[rule.filters.exists]
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field = "user_agent.original"
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[rule.filters.meta]
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disabled = false
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indexRefName = "kibanaSavedObjectMeta.searchSourceJSON.filter[0].meta.index"
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key = "user_agent.original"
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negate = true
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type = "exists"
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value = "exists"
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