Pure Controller Failed

id: c317b007-84e7-4449-93f4-4444f6638fd0
name: Pure Controller Failed
version: 1.0.0
kind: NRT
description: Detect controller failure and take appropriate response action.
severity: High
tactics:
- Execution
relevantTechniques:
- T0871
query: |-
  Syslog
  | where SyslogMessage has "purity.alert"
  | extend Message = replace_regex(SyslogMessage, "#012", "\n")
  | extend ParsedLog = extract_all(@"((?P<process>.*?)\[(?P<processid>.*?)\]:\s(?P<object>.*)\[(?P<responsecode>\w+)\][\s\S]*Severity:\s*(?P<severity>\S+)\s*(Tag:\s*(?P<reason>\S+))?\s*UTC([\s\S]*)Array Name:\s*(?P<objectname>\S+)\s*Domain:\s*(?P<domainorigin>\S+)\s*(?P<part2log>[\s\S]*))", dynamic(['process','processid','object','objectname','responsecode','severity','reason','domainorigin','part2log']), Message)
  | mv-expand ParsedLog
  | extend ResidueLog = tostring(ParsedLog[8])
  | extend Rlog = extract_all(@"(((Suggested Action:\s*(?P<action>[\s\S]*)\s*Knowledge Base Article:\s*(?P<url>.*))|(Knowledge Base Article:\s*(?P<url>.*)\s*Suggested Action:\s*(?P<action>.*)\s*)|(Suggested Action:\s*(?P<action>[\s\S]*)))(([\s\S]*)Purity Version:\s*(?P<pversion>.*))?\s*([\s\S]*)Variables: \(below\)\s*(?P<subject>[\s\S]*))", dynamic(['action','url','pversion','subject']),ResidueLog)
  | mv-expand Rlog
  | extend PureLogType = ParsedLog[0], PureProcessID = ParsedLog[1], PureObject = ParsedLog[2], PureCode = ParsedLog[4], PureSeverity = ParsedLog[5], PureReason = ParsedLog[6], PureObjectName = ParsedLog[3], PureDomainOrigin = ParsedLog[7], PureAction = Rlog[0], PureUrl = Rlog[1], PureVersion = Rlog[2], PureMessage = Rlog[3]
  | project-away ResidueLog, Rlog, ParsedLog
  | where PureObject matches regex @"(Controllers ct[0-9] have failed)"
suppressionDuration: 5h
suppressionEnabled: false
eventGroupingSettings:
  aggregationKind: SingleAlert
alertDetailsOverride:
  alertDynamicProperties: []
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: HostIP
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    reopenClosedIncident: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
    groupByEntities: []
    groupByAlertDetails: []
    groupByCustomDetails: []