Semperis DSP Well-known privileged SIDs in sIDHistory

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Id	ddd75d93-5b8b-4349-babe-c4e15343c5a3
Rulename	Semperis DSP Well-known privileged SIDs in sIDHistory
Description	This indicator looks for security principals that contain specific SIDs of accounts from built-in privileged groups within their sIDHistory attribute. This would allow those security principals to have the same privileges as those privileged accounts, but in a way that is not obvious to monitor (e.g. through group membership).
Severity	Medium
Tactics	PrivilegeEscalation DefenseEvasion
Techniques	T1134
Required data connectors	SemperisDSP
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/SemperisDSP_WellKnownPrivilegedSIDsInsIDHistory.yaml
Version	2.0.7
Arm template	ddd75d93-5b8b-4349-babe-c4e15343c5a3.json

KQL

dsp_parser
| where EventID == 9212
| where SecurityIndicatorName == "Well-known privileged SIDs in sIDHistory"
| extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.'))

YAML

queryPeriod: 1h
query: |
  dsp_parser
  | where EventID == 9212
  | where SecurityIndicatorName == "Well-known privileged SIDs in sIDHistory"
  | extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.'))  
name: Semperis DSP Well-known privileged SIDs in sIDHistory
entityMappings:
- fieldMappings:
  - columnName: HostName
    identifier: HostName
  - columnName: DnsDomain
    identifier: DnsDomain
  entityType: Host
queryFrequency: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/SemperisDSP_WellKnownPrivilegedSIDsInsIDHistory.yaml
requiredDataConnectors:
- connectorId: SemperisDSP
  dataTypes:
  - dsp_parser
description: |
    'This indicator looks for security principals that contain specific SIDs of accounts from built-in privileged groups within their sIDHistory attribute. This would allow those security principals to have the same privileges as those privileged accounts, but in a way that is not obvious to monitor (e.g. through group membership).'
kind: Scheduled
version: 2.0.7
status: Available
severity: Medium
relevantTechniques:
- T1134
triggerOperator: gt
triggerThreshold: 0
tactics:
- PrivilegeEscalation
- DefenseEvasion
id: ddd75d93-5b8b-4349-babe-c4e15343c5a3

ARM