102 lines
3.6 KiB
Markdown
102 lines
3.6 KiB
Markdown
# osquery-defense-kit
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Real-world queries for using osquery as part of your detection & response pipeline.
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## Organization
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* `detection/` - Threat detection queries tuned for alert generation.
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* `response/` - Data collection to assist in responding to possible threats. Tuned for periodic evidence collection.
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* `policy/` - Security policy queries tuned for alert generation.
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Where suitable, queries are further divided up by [MITRE ATT&CK](https://attack.mitre.org/) tactics categories. Queries are periodically released in [osquery query pack](https://osquery.readthedocs.io/en/stable/deployment/configuration/#query-packs) format. See `Local Pack Generation` for more information.
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## Linux Case Study: Shikitega (September 2022)
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<https://cybersecurity.att.com/blogs/labs-research/shikitega-new-stealthy-malware-targeting-linux>
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Here is a partial list of what queries would have fired an alert based on these queries:
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* *Initial Dropper Execution*, detected by:
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* `execution/tiny-executable-events.sql`
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* `execution/tiny-executable.sql`
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* *Next Stage Dropper Execution*, detected by:
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* `execution/tiny-executable-events.sql`
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* `execution/tiny-executable.sql`
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* `execution/unexpected-shell-parents.sql`
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* *Escalation Prep*, detected by:
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* `execution/sketchy-fetchers.sql`
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* `execution/sketchy-fetcher-events.sql`
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* `c2/unexpected-talkers-linux.sql`
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* `c2/exotic-command-events.sql`
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* `c2/exotic-cmdline.sql`
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* *Escalation Tool Execution* detected by:
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* `execution/unexpected-executable-permissions.sql`
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* `execution/unexpected-executable-directory-linux.sql`
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* `execution/unexpected-tmp-executables.sql`
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* `c2/exotic-command-events.sql`
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* `c2/exotic-cmdline.sql`
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* `initial_access/unexpected-shell-parents.sql`
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* `evasion/missing-from-disk-linux.sql`
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* *Privilege Escalation* detected by:
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* `privesc/unexpected-setxid-process.sql`
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* `privesc/unexpected-privilege-escalation.sql`
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* `privesc/events/unexpected-privilege-escalation-events.sql`
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* `evasion/name_path_mismatch.sql`
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* *Persistence* detected by:
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* `persistence/unexpected-cron-entries.sql`
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* `execution/unexpected-executable-directory-linux.sql`
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## macOS Case Study: CloudMensis (April 2022)
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<https://www.welivesecurity.com/2022/07/19/i-see-what-you-did-there-look-cloudmensis-macos-spyware/>
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Here is a partial list of what stages would have been detected by particular queries:
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* *Initial Dropper Execution*, detected by:
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* `c2/unexpected-talkers-macos.sql`
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* *Second Stage Execution*, detected by:
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* `execution/unexpected-executable-directory-macos.sql`
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* `persistence/unexpected-launch-daemon-macos.sql`
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* `execution/unexpected-mounts.sql`
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* *TCC Bypass*, detected by:
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* `evasion/unexpected-env-values.sql`
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* *Spy Agent Execution*, detected by:
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* `c2/unexpected-talkers-macos.sql`
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* `execution/exotic-command-events.sql`
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* `execution/unexpected-executable-directory-macos.sql`
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## False Positive Policy
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We endeavor to exclude real-world false positives from our `detection` queries.
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Managing false positives is easier said than done - pull requests are welcome!
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## Tags Policy
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Value:
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* critical: queries are run 3x as often
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* high: queries are run twice as often
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* medium: queries are run at a regular pace (default)
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* low: queries are run half as often
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* very-low: queries are run 1/3rd as often
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Interval Type:
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* ephemeral: 60s (1 minute) base
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* periodic: 1200s (20 minute) base (default)
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* postmortem: 14400s (4 hour) base
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Status:
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* experimental: Run only half as often as normal
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## Local pack generation
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Run `make packs`
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