PaloAlto - Possible port scan

Back


Id	3575a9c0-51c9-11ec-bf63-0242ac130002
Rulename	PaloAlto - Possible port scan
Description	Detects possible port scan.
Severity	High
Tactics	Reconnaissance
Techniques	T1595
Required data connectors	CefAma
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAltoCDL/Analytic Rules/PaloAltoCDLPossiblePortScan.yaml
Version	1.0.4
Arm template	3575a9c0-51c9-11ec-bf63-0242ac130002.json

KQL

let threshold = 10;
PaloAltoCDLEvent
| where EventResourceId =~ 'TRAFFIC'
| where isnotempty(DstPortNumber) and isnotempty(SrcIpAddr)
| summarize PortSet = make_set(DstPortNumber) by SrcIpAddr, bin(TimeGenerated, 5m)
| where array_length(PortSet) > threshold
| extend IPCustomEntity = SrcIpAddr

YAML

entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
tactics:
- Reconnaissance
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: CefAma
id: 3575a9c0-51c9-11ec-bf63-0242ac130002
severity: High
status: Available
query: |
  let threshold = 10;
  PaloAltoCDLEvent
  | where EventResourceId =~ 'TRAFFIC'
  | where isnotempty(DstPortNumber) and isnotempty(SrcIpAddr)
  | summarize PortSet = make_set(DstPortNumber) by SrcIpAddr, bin(TimeGenerated, 5m)
  | where array_length(PortSet) > threshold
  | extend IPCustomEntity = SrcIpAddr  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAltoCDL/Analytic Rules/PaloAltoCDLPossiblePortScan.yaml
kind: Scheduled
queryPeriod: 1h
version: 1.0.4
name: PaloAlto - Possible port scan
queryFrequency: 1h
triggerThreshold: 0
relevantTechniques:
- T1595
description: |
    'Detects possible port scan.'
triggerOperator: gt

ARM