↳ GitHub sourceAnalytics ruleMedium
CTE - Device Repeatedly Blocked Across Multiple Days
Description
A device has triggered URL blocks on 3 or more distinct days in the past week, suggesting a recurring risky browsing pattern or persistent exposure.
- Rule type
- Scheduled
- Version
- 1.0.0
- Query frequency
- 12h
- 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.
CybereinforceCTE_CL
| where EventType == "block.url"
| extend d = parse_json(Details)
| extend
DeviceId = tostring(d.deviceId),
HostName = iff(isnotempty(tostring(d.hostname)), tostring(d.hostname), strcat("cte-device-", substring(EntityId, 0, 8))),
DeviceUser = tostring(d.deviceUser),
DeviceOs = tostring(d.deviceOs),
DeviceVersion = tostring(d.deviceVersion),
RuleId = tostring(d.ruleId),
RuleName = iff(isnotempty(tostring(d.ruleName)), tostring(d.ruleName), "Pattern Match"),
Pattern = tostring(d.pattern),
Url = tostring(d.url),
Action = tostring(d.action),
IsIoc = tobool(d.ioc),
ClientIp = tostring(split(tostring(d.clientIp), ":")[0]),
ClientPort = tostring(split(tostring(d.clientIp), ":")[1]),
UserAgent = tostring(d.userAgent)
| summarize BlockDays=dcount(startofday(TimeGenerated)), BlockCount=count(), SampleUrls=make_set(Url, 20) by DeviceId, HostName, DeviceUser, DeviceOs, TenantId
| where BlockDays >= 3
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
8fbb095d-3a35-483b-b264-25b858a52f4d
GSTEP / CATALOG TRACKING
Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC