Detection rules › Kusto
Tomcat - Request from localhost IP address
'Detects request from localhost IP address.'
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access | T1133 External Remote Services, T1190 Exploit Public-Facing Application |
Rule body kusto
id: a45dd6ea-4874-11ec-81d3-0242ac130003
name: Tomcat - Request from localhost IP address
description: |
'Detects request from localhost IP address.'
severity: Medium
status: Available
requiredDataConnectors:
- connectorId: CustomLogsAma
datatypes:
- Tomcat_CL
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
- InitialAccess
relevantTechniques:
- T1190
- T1133
query: |
TomcatEvent
| where SrcIpAddr == "127.0.0.1"
| extend File = extract(@'(.*\/)?(.*)', 2, tostring(UrlOriginal))
| extend IPCustomEntity = SrcIpAddr, FileCustomEntity = File
entityMappings:
- entityType: File
fieldMappings:
- identifier: Name
columnName: FileCustomEntity
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
version: 1.0.2
kind: Scheduled
Stages and Predicates
Stage 1: source
TomcatEvent
Stage 2: where
| where SrcIpAddr == "127.0.0.1"
Stage 3: extend
| extend File = extract(@'(.*\/)?(.*)', 2, tostring(UrlOriginal))
Stage 4: extend
| extend IPCustomEntity = SrcIpAddr, FileCustomEntity = File
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 |
|---|---|---|
SrcIpAddr | eq |
|
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 |
|---|---|
File | extend |
FileCustomEntity | extend |
IPCustomEntity | extend |