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Cyble Vision Alerts Compromised Endpoint Cookies

This is a third-party alert feed, not a detection over modeled telemetry. The vendor product raised the finding; this rule forwards it into the SIEM. It is searchable for reference but is excluded from the detection-rule browse and the ATT&CK coverage matrix.

Status
available
Severity
low
Time window
30m
Source
github.com/Azure/Azure-Sentinel

'Detects compromised browser cookies associated with monitored entities. Identifies exposed authentication cookies with future expiry, enabling potential session hijacking or persistent unauthorized access.'

MITRE ATT&CK coverage

TacticTechniques
Credential AccessT1539 Steal Web Session Cookie
Lateral MovementT1550 Use Alternate Authentication Material

Rule body kusto

id: 33B07EAA-F451-4C38-AC9F-8AF3F7E99F0E
name: Cyble Vision Alerts Compromised Endpoint Cookies
description: |
  'Detects compromised browser cookies associated with monitored entities. Identifies exposed authentication cookies with future expiry, enabling potential session hijacking or persistent unauthorized access.'
severity: Low
status: Available
requiredDataConnectors:
- connectorId: CybleVisionAlerts
  dataTypes:
  - CybleVisionAlerts_CL
enabled: true
queryfrequency: 30m
queryPeriod: 30m
triggerOperator: GreaterThan
triggerThreshold: 0
suppressionDuration: PT1H
eventGroupingSettings:
  aggregationKind: AlertPerResult
tactics:
- CredentialAccess
- DefenseEvasion
relevantTechniques:
- T1539
- T1550
query: |
  Alerts_compromised_endpoints_cookies
  | where Service == "compromised_endpoints_cookies"
  | extend MappedSeverity = Severity
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
alertDetailsOverride:
  alertDisplayNameFormat: Compromised Session Cookie {{CEC_Email}} {{CEC_URL}}
  alertDescriptionFormat: |
    A compromised browser session cookie associated with {{CEC_EmailDomain}} was detected for service {{CEC_URL}}. The cookie has not expired and may allow session hijacking. Session ID {{CEC_SessionID}}.
customDetails:
  MappedSeverity: Severity
  Status: Status
  AlertID: AlertID
  Service: Service
  CookieEmail: CEC_Email
  CookieDomain: CEC_EmailDomain
  CookieSessionID: CEC_SessionID
  CookieExpiry: CEC_Expiry
  CookieURL: CEC_URL
entityMappings:
- entityType: Url
  fieldMappings:
  - identifier: Url
    columnName: CEC_URL
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: CEC_Email
version: 1.0.0
kind: Scheduled

Stages and Predicates

Stage 1: source

Alerts_compromised_endpoints_cookies

Stage 2: where

| where Service == "compromised_endpoints_cookies"

Stage 3: extend

| extend MappedSeverity = Severity

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.

FieldKindValues
Serviceeq
  • compromised_endpoints_cookies transforms: cased

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.

FieldSource
MappedSeverityextend