Egress Defend - Dangerous Link Click

Back


Id	a896123e-03a5-4a4d-a7e3-fd814846dfb2
Rulename	Egress Defend - Dangerous Link Click
Description	Defend has detected a user has clicked a dangerous link in their mailbox.
Severity	Medium
Tactics	Execution
Techniques	T1204 T0853
Required data connectors	EgressDefend
Kind	Scheduled
Query frequency	30m
Query period	30m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Egress Defend/Analytic Rules/DangerousLinksClicked.yaml
Version	1.0.0
Arm template	a896123e-03a5-4a4d-a7e3-fd814846dfb2.json

KQL

DefendAuditData
| where LinksClicked > 0
| where ThreatLevel == "dangerous" or ThreatLevel == "suspicious"
| extend Account_0_FullName = trim(@"[^@.\w]+",Recipients)

YAML

customDetails:
  timesClicked: LinksClicked
  DefendSender: From
  DefendSenderIP: SenderIP
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Egress Defend/Analytic Rules/DangerousLinksClicked.yaml
query: |
  DefendAuditData
  | where LinksClicked > 0
  | where ThreatLevel == "dangerous" or ThreatLevel == "suspicious"
  | extend Account_0_FullName = trim(@"[^@.\w]+",Recipients)  
requiredDataConnectors:
- dataTypes:
  - EgressDefend_CL
  connectorId: EgressDefend
tactics:
- Execution
name: Egress Defend - Dangerous Link Click
kind: Scheduled
relevantTechniques:
- T1204
- T0853
severity: Medium
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: Account_0_FullName
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: SenderIP
  entityType: IP
- fieldMappings:
  - identifier: Url
    columnName: Url
  entityType: URL
- fieldMappings:
  - identifier: MailboxPrimaryAddress
    columnName: Account_0_FullName
  entityType: Mailbox
tags:
- Defend
queryFrequency: 30m
description: |
    'Defend has detected a user has clicked a dangerous link in their mailbox.'
alertDetailsOverride:
  alertDisplayNameFormat: Alert - {{Account_0_FullName}} as clicked a suspicious link.
triggerThreshold: 0
triggerOperator: gt
version: 1.0.0
queryPeriod: 30m
id: a896123e-03a5-4a4d-a7e3-fd814846dfb2

ARM