Detection rules › Kusto
Imperva - Malicious Client
'Detects connections from known malicious clients.'
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access |
Rule body
id: 2ff35ed4-b26a-4cad-93a6-f67adb00e919
name: Imperva - Malicious Client
description: |
'Detects connections from known malicious clients.'
severity: High
status: Available
requiredDataConnectors:
- connectorId: ImpervaWAFCloudAPI
dataTypes:
- ImpervaWAFCloud
queryFrequency: 10m
queryPeriod: 10m
triggerOperator: gt
triggerThreshold: 0
tactics:
- InitialAccess
relevantTechniques:
- T1190
- T1133
query: |
ImpervaWAFCloud
| where ClientApp in~ ('VulnerabilityScanner', 'DDoSBot', 'ClickBot','CommentSpamBot','HackingTool', 'SpamBot', 'Worm')
| where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'
| extend IPCustomEntity = SrcIpAddr, UrlCustomEntity = QueryString
entityMappings:
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
- entityType: URL
fieldMappings:
- identifier: Url
columnName: UrlCustomEntity
version: 1.0.1
kind: Scheduled
Stages and Predicates
Stage 1: source
ImpervaWAFCloud
Stage 2: where
| where ClientApp in~ ('VulnerabilityScanner', 'DDoSBot', 'ClickBot','CommentSpamBot','HackingTool', 'SpamBot', 'Worm')
Stage 3: where
| where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'
Stage 4: extend
| extend IPCustomEntity = SrcIpAddr, UrlCustomEntity = QueryString
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
ClientApp | in |
| field:"ClientApp" kind:in |
Output fields
These fields are emitted when the rule matches.
| Field | Source |
|---|---|
IPCustomEntity | extend |
UrlCustomEntity | extend |