MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Exfiltration |
Rule body
id: df5c34dd-e1e6-4e07-90b1-4309ebfe754c
name: Cisco SEG - DLP policy violation
description: |
'Detects DLP policy violation.'
severity: Medium
status: Available
requiredDataConnectors:
- connectorId: CefAma
dataTypes:
- CommonSecurityLog
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
- Exfiltration
relevantTechniques:
- T1030
query: |
CiscoSEGEvent
| where NetworkDirection =~ 'Outgoing'
| where tostring(AdditionalFields) has 'ESADLPVerdict'
| extend dlp_verdict = extract(@'ESADLPVerdict":"(NOT_EVALUATED|NO TRIGGER|VIOLATION|NO VIOLATION)"', 1, tostring(AdditionalFields))
| where dlp_verdict =~ 'VIOLATION'
| extend AccountCustomEntity = SrcUserName
entityMappings:
- entityType: Account
fieldMappings:
- identifier: Name
columnName: AccountCustomEntity
version: 1.0.3
kind: Scheduled
Stages and Predicates
Stage 1: source
CiscoSEGEvent
Stage 2: where
| where NetworkDirection =~ 'Outgoing'
Stage 3: where
| where tostring(AdditionalFields) has 'ESADLPVerdict'
Stage 4: extend
| extend dlp_verdict = extract(@'ESADLPVerdict":"(NOT_EVALUATED|NO TRIGGER|VIOLATION|NO VIOLATION)"', 1, tostring(AdditionalFields))
Stage 5: where
| where dlp_verdict =~ 'VIOLATION'
Stage 6: extend
| extend AccountCustomEntity = SrcUserName
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
AdditionalFields | match |
| field:"AdditionalFields" kind:match value:"ESADLPVerdict" |
NetworkDirection | eq |
| field:"NetworkDirection" kind:eq value:"Outgoing" |
dlp_verdict | eq |
| field:"dlp_verdict" kind:eq value:"VIOLATION" |
Output fields
These fields are emitted when the rule matches.
| Field | Source |
|---|---|
dlp_verdict | extend |
AccountCustomEntity | extend |