↳ GitHub sourceAnalytics ruleMedium
SlackAudit - User login after deactivated.
Description
'Detects when a Slack user account was deactivated and the same user identity later authenticated again within
the detection window, which may indicate account reactivation, unauthorized access, or use of a deactivated account. Analyst
triage should review the deactivation time, subsequent login time, EntityUserEmail, and EntityUserId to determine whether
the login was expected. This rule uses the SlackAuditAPI connector and SlackAudit_CL data type.'
- Rule type
- Scheduled
- Version
- 1.0.1
- Declared status
- Available
- Query frequency
- 1h
- Query period
- 14d
- 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 lbperiod_max_d = 14d;
let lbperiod_min_d = 1d;
let lb_time_max_h = 24h;
SlackAudit
| where TimeGenerated between (ago(lbperiod_max_d) .. (lbperiod_min_d))
| where Action =~ 'user_deactivated'
| summarize deactivation_time = max(TimeGenerated) by EntityUserEmail, EntityUserId
| project deactivation_time, EntityUserEmail, EntityUserId
| join (SlackAudit
| where TimeGenerated > ago(lb_time_max_h)
| where Action =~ 'user_login'
| summarize new_login_time = max(TimeGenerated) by SrcUserEmail, SrcUserIdentity
| project new_login_time, SrcUserEmail, EntityUserId = SrcUserIdentity) on EntityUserId
| where EntityUserEmail == SrcUserEmail
| where deactivation_time < new_login_time
| extend AccountCustomEntity = SrcUserEmail
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
e6e99dcb-4dff-48d2-8012-206ca166b36b
GSTEP / CATALOG TRACKING
Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC