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https://github.com/marcredhat/kql
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marc
35 lines
1.5 KiB
PowerQuery
35 lines
1.5 KiB
PowerQuery
// Rule: 06_daily_process_execution_trend
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// Daily baseline of process executions (4688)
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//
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// Source KQL: see ../kql/06_daily_process_execution_trend.kql
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//
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// HOW TO RUN
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// curl POST {sdl}/api/powerQuery with this body, OR paste in
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// the SDL console. Set startTime = '2h' (or wider) so the API
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// scans the freshly-ingested epochs that contain the events.
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//
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// Time anchor at export: NOW = 2026-05-31T20:10:05+00:00
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// Recent-window cutoff: 2026-05-31T18:10:05+00:00
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// (`ts_epoch_ms` below is that cutoff expressed in ms.
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// Re-run harness/export_rules.py to refresh after regenerating
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// sample_data/events.jsonl.)
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//
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// Fields referenced: Account, CommandLine, Computer, Count, DistinctAccounts, DistinctComputers, DistinctParent, EventID, NewProcessName, NoofCommandLines…
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//
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// EDITING NOTE
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// Every line that starts with `|` is a pipeline stage. Each `|`
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// is REQUIRED. If you delete one (e.g. while changing a literal
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// on the same line as a stage), SDL re-parses the keyword that
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// follows as a search term and rejects the query with errors
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// like `'estimate_distinct' is a grouping function`.
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event_type='SecurityEvent'
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| filter ts_epoch_ms >= 1780251005000
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| filter EventID = 4688
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| group Count = count(),
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DistinctComputers = estimate_distinct(Computer),
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DistinctAccounts = estimate_distinct(Account),
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DistinctParent = estimate_distinct(ParentProcessName),
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NoofCommandLines = estimate_distinct(CommandLine)
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by NewProcessName
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