Description
'This alert creates an incident when a source IP addresses attempt to communicate with a large amount of distinct ports within a short period.'
- Rule type
- Scheduled
- Version
- 1.0.4
- 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
KQL query
Original query, unchanged.
let threshold = 50;
SophosXGFirewall
| where Log_Type =~ "Firewall"
| where not(ipv4_is_match("10.0.0.0",Src_IP,8) or ipv4_is_match("172.16.0.0",Src_IP,12) or ipv4_is_match("192.168.0.0",Src_IP,16))
| summarize dcount(Dst_Port) by Src_IP, bin(TimeGenerated, 5m)
| where dcount_Dst_Port > threshold
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
427e4c9e-8cf4-4094-a684-a2d060dbca38
GSTEP / CATALOG TRACKING
Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC