Justin Ibarra
1840a638c8
Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>
39 lines
1.3 KiB
TOML
39 lines
1.3 KiB
TOML
[metadata]
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creation_date = "2020/02/18"
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maturity = "production"
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updated_date = "2022/05/13"
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[rule]
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author = ["Elastic"]
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description = "Identifies processes running in a temporary folder. This is sometimes done by adversaries to hide malware."
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false_positives = [
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"""
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Build systems, like Jenkins, may start processes in the `/tmp` directory. These can be exempted by name or by
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username.
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""",
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]
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from = "now-9m"
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index = ["auditbeat-*", "logs-endpoint.events.*"]
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language = "kuery"
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license = "Elastic License v2"
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name = "Unusual Process Execution - Temp"
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risk_score = 47
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rule_id = "df959768-b0c9-4d45-988c-5606a2be8e5a"
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severity = "medium"
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tags = ["Elastic", "Host", "Linux", "Threat Detection"]
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timestamp_override = "event.ingested"
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type = "query"
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query = '''
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event.category:process and event.type:(start or process_started) and process.working_directory:/tmp and
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not process.parent.name:(update-motd-updates-available or
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apt or apt-* or
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cnf-update-db or
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appstreamcli or
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unattended-upgrade or
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packagekitd) and
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not process.args:(/usr/lib/update-notifier/update-motd-updates-available or
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/var/lib/command-not-found/)
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'''
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