Semperis DSP Failed Logons

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Id	0e105444-fe13-4ce6-9239-21880076a3f9
Rulename	Semperis DSP Failed Logons
Description	Alerts when there are failed logons in the DSP system.
Severity	Medium
Tactics	InitialAccess CredentialAccess
Techniques	T1078 T1110
Required data connectors	SemperisDSP
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/Semperis Directory Services Protector/Analytic Rules/Semperis_DSP_Failed_Logons.yaml
Version	2.0.7
Arm template	0e105444-fe13-4ce6-9239-21880076a3f9.json

KQL

SecurityEvent
| where EventSourceName == 'Semperis-Operation-Log' and EventID == 20002
| sort by TimeGenerated desc 
| extend p1Xml = parse_xml(EventData).EventData.Data
| mv-expand bagexpansion=array p1Xml
| evaluate bag_unpack(p1Xml)
| extend Name=column_ifexists('@Name', ''), Value=column_ifexists('#text', '')
| evaluate pivot(Name, any(Value), TimeGenerated, EventSourceName, Channel, Computer, Level, EventLevelName, EventID, Task, Type, _ResourceId)
| extend det = column_ifexists('details', '')
| parse det with * "Trustee Name: " TrusteeName " Correlation ID: " * " Source: " HostIP "WebSite Target" *
| extend host = tostring(HostIP)
| extend HostIP = trim_end(":", HostIP)
| project TimeGenerated, TrusteeName, HostIP, _ResourceId
| extend NTDomain = tostring(split(TrusteeName, '\\', 0)[0]), Name = tostring(split(TrusteeName, '\\', 1)[0])

YAML

queryPeriod: 30m
description: |
    'Alerts when there are failed logons in the DSP system.'
kind: Scheduled
query: |
  SecurityEvent
  | where EventSourceName == 'Semperis-Operation-Log' and EventID == 20002
  | sort by TimeGenerated desc 
  | extend p1Xml = parse_xml(EventData).EventData.Data
  | mv-expand bagexpansion=array p1Xml
  | evaluate bag_unpack(p1Xml)
  | extend Name=column_ifexists('@Name', ''), Value=column_ifexists('#text', '')
  | evaluate pivot(Name, any(Value), TimeGenerated, EventSourceName, Channel, Computer, Level, EventLevelName, EventID, Task, Type, _ResourceId)
  | extend det = column_ifexists('details', '')
  | parse det with * "Trustee Name: " TrusteeName " Correlation ID: " * " Source: " HostIP "WebSite Target" *
  | extend host = tostring(HostIP)
  | extend HostIP = trim_end(":", HostIP)
  | project TimeGenerated, TrusteeName, HostIP, _ResourceId
  | extend NTDomain = tostring(split(TrusteeName, '\\', 0)[0]), Name = tostring(split(TrusteeName, '\\', 1)[0])   
tactics:
- InitialAccess
- CredentialAccess
triggerOperator: gt
eventGroupingSettings:
  aggregationKind: SingleAlert
alertDetailsOverride:
  alertDisplayNameFormat: Failed Logon -- Alert from Semperis Directory Services Protector
  alertDescriptionFormat: A failed logon was detected to the DSP system.
id: 0e105444-fe13-4ce6-9239-21880076a3f9
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis Directory Services Protector/Analytic Rules/Semperis_DSP_Failed_Logons.yaml
version: 2.0.7
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: HostIP
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: Name
  - identifier: NTDomain
    columnName: NTDomain
triggerThreshold: 0
status: Available
relevantTechniques:
- T1078
- T1110
name: Semperis DSP Failed Logons
severity: Medium
requiredDataConnectors:
- dataTypes:
  - dsp_parser
  connectorId: SemperisDSP
queryFrequency: 30m

ARM