CyberArkEPM - Unexpected executable extension

Back


Id	911d5b75-a1ce-4f13-a839-9c2474768696
Rulename	CyberArkEPM - Unexpected executable extension
Description	Detects Windows executable with unexpected extension.
Severity	Medium
Tactics	Execution DefenseEvasion
Techniques	T1204 T1036
Required data connectors	CyberArkEPM
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/CyberArkEPM/Analytic Rules/CyberArkEPMUnexpectedExecutableExtension.yaml
Version	1.0.0
Arm template	911d5b75-a1ce-4f13-a839-9c2474768696.json

KQL

CyberArkEPM
| where EventSubType != 'AttackAttempt'
| where ActingProcessName has @'\'
| where ActingProcessName !endswith '.exe'
| project EventEndTime, EventMessage, ActorUsername, ActingProcessFileInternalName
| extend AccountCustomEntity = ActorUsername

YAML

description: |
    'Detects Windows executable with unexpected extension.'
kind: Scheduled
tactics:
- Execution
- DefenseEvasion
requiredDataConnectors:
- connectorId: CyberArkEPM
  dataTypes:
  - CyberArkEPM
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CyberArkEPM/Analytic Rules/CyberArkEPMUnexpectedExecutableExtension.yaml
severity: Medium
name: CyberArkEPM - Unexpected executable extension
triggerThreshold: 0
queryPeriod: 30m
query: |
  CyberArkEPM
  | where EventSubType != 'AttackAttempt'
  | where ActingProcessName has @'\'
  | where ActingProcessName !endswith '.exe'
  | project EventEndTime, EventMessage, ActorUsername, ActingProcessFileInternalName
  | extend AccountCustomEntity = ActorUsername  
relevantTechniques:
- T1204
- T1036
id: 911d5b75-a1ce-4f13-a839-9c2474768696
queryFrequency: 30m
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
triggerOperator: gt
version: 1.0.0

ARM