↳ GitHub sourceAnalytics ruleMedium
GitLab - Abnormal number of repositories deleted
Description
'This hunting queries identify an unusual increase of repo deletion activities adversaries may want to disrupt availability or compromise integrity by deleting business data.'
- Rule type
- Scheduled
- Version
- 1.0.1
- Declared status
- Available
- Query frequency
- 1h
- Query period
- 1d
- 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 LearningPeriod = 7d;
let BinTime = 1h;
let RunTime = 1h;
let StartTime = 1h;
let NumberOfStds = 3;
let MinThreshold = 10.0;
let EndRunTime = StartTime - RunTime;
let EndLearningTime = StartTime + LearningPeriod;
let GitLabRepositoryDestroyEvents = (GitLabAudit
| where RemoveAction == "project" or RemoveAction == "repository");
GitLabRepositoryDestroyEvents
| where TimeGenerated between (ago(EndLearningTime) .. ago(StartTime))
| summarize count() by bin(TimeGenerated, BinTime)
| summarize AvgInLearning = avg(count_), StdInLearning = stdev(count_)
| extend LearningThreshold = max_of(AvgInLearning + StdInLearning * NumberOfStds, MinThreshold)
| extend Dummy = 1
| join kind=innerunique (GitLabRepositoryDestroyEvents
| where TimeGenerated between (ago(StartTime) .. ago(EndRunTime))
| summarize CountInRunTime = count() by bin(TimeGenerated, BinTime)
| extend Dummy = 1) on Dummy
| project-away Dummy
| where CountInRunTime > LearningThreshold
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
3efd09bd-a582-4410-b7ec-5ff21cfad7bd
GSTEP / CATALOG TRACKING
Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC