CyberArkEPM - Uncommon Windows process started from System folder
Id | 16b940d2-aaf8-4eaa-a5e1-05df5f5c3d43 |
Rulename | CyberArkEPM - Uncommon Windows process started from System folder |
Description | Detects when uncommon windows proccess is started from System folder. |
Severity | Medium |
Tactics | Execution DefenseEvasion |
Techniques | T1204 T1036 |
Required data connectors | CyberArkEPM |
Kind | Scheduled |
Query frequency | 1h |
Query period | 14d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CyberArkEPM/Analytic Rules/CyberArkEPMNewProcessStartetFromSystem.yaml |
Version | 1.0.0 |
Arm template | 16b940d2-aaf8-4eaa-a5e1-05df5f5c3d43.json |
let lb_period = 14d;
let q_time = 1h;
let sys_proc = CyberArkEPM
| where TimeGenerated between (ago(lb_period) .. ago(q_time))
| where EventSubType != 'AttackAttempt'
| where ActingProcessName has @'\'
| where ActingProcessName has_any ('System32', 'SysWOW64')
| summarize makeset(ActingProcessFileInternalName);
CyberArkEPM
| where TimeGenerated > ago(q_time)
| where EventSubType != 'AttackAttempt'
| where ActingProcessName has @'\'
| where ActingProcessName has_any ('System32', 'SysWOW64')
| where ActingProcessFileInternalName !in (sys_proc)
| extend AccountCustomEntity = ActorUsername
name: CyberArkEPM - Uncommon Windows process started from System folder
severity: Medium
queryFrequency: 1h
triggerOperator: gt
relevantTechniques:
- T1204
- T1036
version: 1.0.0
description: |
'Detects when uncommon windows proccess is started from System folder.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CyberArkEPM/Analytic Rules/CyberArkEPMNewProcessStartetFromSystem.yaml
requiredDataConnectors:
- connectorId: CyberArkEPM
dataTypes:
- CyberArkEPM
entityMappings:
- fieldMappings:
- identifier: Name
columnName: AccountCustomEntity
entityType: Account
tactics:
- Execution
- DefenseEvasion
queryPeriod: 14d
query: |
let lb_period = 14d;
let q_time = 1h;
let sys_proc = CyberArkEPM
| where TimeGenerated between (ago(lb_period) .. ago(q_time))
| where EventSubType != 'AttackAttempt'
| where ActingProcessName has @'\'
| where ActingProcessName has_any ('System32', 'SysWOW64')
| summarize makeset(ActingProcessFileInternalName);
CyberArkEPM
| where TimeGenerated > ago(q_time)
| where EventSubType != 'AttackAttempt'
| where ActingProcessName has @'\'
| where ActingProcessName has_any ('System32', 'SysWOW64')
| where ActingProcessFileInternalName !in (sys_proc)
| extend AccountCustomEntity = ActorUsername
kind: Scheduled
triggerThreshold: 0
id: 16b940d2-aaf8-4eaa-a5e1-05df5f5c3d43
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2024-01-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/16b940d2-aaf8-4eaa-a5e1-05df5f5c3d43')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/16b940d2-aaf8-4eaa-a5e1-05df5f5c3d43')]",
"properties": {
"alertRuleTemplateName": "16b940d2-aaf8-4eaa-a5e1-05df5f5c3d43",
"customDetails": null,
"description": "'Detects when uncommon windows proccess is started from System folder.'\n",
"displayName": "CyberArkEPM - Uncommon Windows process started from System folder",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "AccountCustomEntity",
"identifier": "Name"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CyberArkEPM/Analytic Rules/CyberArkEPMNewProcessStartetFromSystem.yaml",
"query": "let lb_period = 14d;\nlet q_time = 1h;\nlet sys_proc = CyberArkEPM\n| where TimeGenerated between (ago(lb_period) .. ago(q_time))\n| where EventSubType != 'AttackAttempt'\n| where ActingProcessName has @'\\'\n| where ActingProcessName has_any ('System32', 'SysWOW64')\n| summarize makeset(ActingProcessFileInternalName);\nCyberArkEPM\n| where TimeGenerated > ago(q_time)\n| where EventSubType != 'AttackAttempt'\n| where ActingProcessName has @'\\'\n| where ActingProcessName has_any ('System32', 'SysWOW64')\n| where ActingProcessFileInternalName !in (sys_proc)\n| extend AccountCustomEntity = ActorUsername\n",
"queryFrequency": "PT1H",
"queryPeriod": "P14D",
"severity": "Medium",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"DefenseEvasion",
"Execution"
],
"techniques": [
"T1036",
"T1204"
],
"templateVersion": "1.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}