Description
Identifies an abnormal spike in Vaikora for O365 quarantine volume for a tenant. Fires when the hourly count exceeds three times the rolling 7-day baseline, signaling a targeted campaign or model surge worth admin review.
- Rule type
- Scheduled
- Version
- 1.0.0
- Declared status
- Available
- Query frequency
- 1h
- Query period
- 7d
- Trigger
- gt 0
Declared MITRE coverage
Declared sources
Metadata from the source file. No dependencies inferred from KQL.
Connectors
Data types
KQL query
Original query, unchanged.
let baseline = VaikoraO365_Quarantine_CL
| where TimeGenerated between (ago(7d) .. ago(1h))
| summarize HourlyCount = count() by bin(TimeGenerated, 1h), TenantId_s
| summarize AvgHourlyCount = avg(HourlyCount) by TenantId_s;
VaikoraO365_Quarantine_CL
| where TimeGenerated >= ago(1h)
| summarize RecentCount = count() by TenantId_s
| join kind=inner baseline on TenantId_s
| where RecentCount > (AvgHourlyCount * 3.0)
| where RecentCount >= 10
| project TimeGenerated = now(), TenantId = TenantId_s, RecentCount, AvgHourlyCount, RatioOverBaseline = (RecentCount / AvgHourlyCount)
Declared entities
Related content
Links established from declared identifiers and solution manifests.
Source provenance
GitHubDisplayed values come from files in Azure/Azure-Sentinel. They describe the published template, not your workspace configuration.
- Commit
9800e51↗- Source identifier
3b3eb1cd-578d-4198-9b7a-bd7253b0dc9f
GSTEP / CATALOG TRACKING
Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC