Detection rules › Kusto
Cyren High-Risk URL Indicators
This is a third-party alert feed, not a detection over modeled telemetry. The vendor product raised the finding; this rule forwards it into the SIEM. It is searchable for reference but is excluded from the detection-rule browse and the ATT&CK coverage matrix.
'Detects high-risk URL indicators (risk score >= 80) from Cyren malware URL threat intelligence feeds in the last 24 hours. These URLs are associated with malware distribution, phishing campaigns, or other malicious content hosting.'
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access | T1189 Drive-by Compromise, T1566 Phishing |
Rule body kusto
id: 6e8f9c4b-2a3b-5c6d-0e1f-d2e3f4a5b6c7
name: Cyren High-Risk URL Indicators
description: |
'Detects high-risk URL indicators (risk score >= 80) from Cyren malware URL threat intelligence feeds in the last 24 hours.
These URLs are associated with malware distribution, phishing campaigns, or other malicious content hosting.'
severity: High
status: Available
requiredDataConnectors:
- connectorId: CyrenThreatIntel
dataTypes:
- Cyren_Indicators_CL
queryFrequency: 1h
queryPeriod: 1d
triggerOperator: gt
triggerThreshold: 0
tactics:
- InitialAccess
- Execution
relevantTechniques:
- T1566
- T1189
query: |
Cyren_Indicators_CL
| where TimeGenerated > ago(1d)
| where isnotempty(url_s)
| extend Risk = toint(risk_d)
| where Risk >= 80
| summarize
DetectionCount = count(),
MaxRisk = max(Risk),
Categories = make_set(category_s)
by URL = url_s, Domain = domain_s, Source = source_s
| where DetectionCount >= 1
| extend
MaliciousURL = URL,
ThreatCategories = strcat_array(Categories, ", ")
suppressionDuration: 1h
suppressionEnabled: false
incidentConfiguration:
createIncident: true
groupingConfiguration:
enabled: true
reopenClosedIncident: false
lookbackDuration: 1d
matchingMethod: Selected
groupByEntities:
- URL
eventGroupingSettings:
aggregationKind: AlertPerResult
customDetails:
RiskScore: MaxRisk
DetectionCount: DetectionCount
Categories: ThreatCategories
Domain: Domain
Source: Source
entityMappings:
- entityType: URL
fieldMappings:
- identifier: Url
columnName: MaliciousURL
version: 1.0.0
kind: Scheduled
Stages and Predicates
Stage 1: source
Cyren_Indicators_CL
Stage 2: where
| where TimeGenerated > ago(1d)
Stage 3: where
| where isnotempty(url_s)
Stage 4: extend
| extend Risk = toint(risk_d)
Stage 5: where
| where Risk >= 80
Stage 6: summarize
| summarize
DetectionCount = count(),
MaxRisk = max(Risk),
Categories = make_set(category_s)
by URL = url_s, Domain = domain_s, Source = source_s
Stage 7: where
| where DetectionCount >= 1
Stage 8: extend
| extend
MaliciousURL = URL,
ThreatCategories = strcat_array(Categories, ", ")
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
DetectionCount | ge |
|
Risk | ge |
|
url_s | is_not_null |
Output fields
Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.
| Field | Source |
|---|---|
Categories | summarize |
DetectionCount | summarize |
Domain | summarize |
MaxRisk | summarize |
Source | summarize |
URL | summarize |
MaliciousURL | extend |
ThreatCategories | extend |