↳ GitHub sourceAnalytics ruleHigh
Valimail Enforce - DMARC Policy Weakened to None
Description
This query searches for DMARC policies changed to 'none', which disables enforcement
and leaves the domain vulnerable to spoofing and phishing attacks.
- Rule type
- Scheduled
- Version
- 1.0.0
- Declared status
- Available
- Query frequency
- 1h
- Query period
- 1h
- 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.
ValimailEnforceEvents_CL
| where EventSeverity == "High"
| where EventType == "dmarc_policy_set_to_none"
| summarize
EventCount = count(),
FirstSeen = min(PerformedAt),
LastSeen = max(PerformedAt),
Changes = make_set(EventChange)
by Subject, User, EventCategory
| extend
AccountName = tostring(split(User, "@")[0]),
AccountDomain = tostring(split(User, "@")[1]),
DomainName = Subject
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
44ec1fa4-a502-41ae-879a-3aad3557edce
GSTEP / CATALOG TRACKING
Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC