Pure Failed Login

Syslog
| where SyslogMessage has "purity.alert" and SyslogMessage has "invalid username or password"
| extend Message = SyslogMessage
| extend ParsedLog = extract_all(@"((?P<process>.*?)\[(?P<processid>.*?)\][\s\S]*?Array name:\s*'(?P<arrayname>\S+)'[\s\S]*?Controller:\s*'?(?P<controller>[^']+)'?[\s\S]*Interface:\s*'(?P<interface>\S+)'.*?User:\s'(?P<login>.*?)'\sLocation: '(?P<location>[^']+)'\sSublocation: '(?P<sublocation>[^']+)\s*(?P<part2log>[\s\S]*))", dynamic(['process', 'processid', 'arrayname', 'controller', 'interface','login', 'location', 'sublocation', 'part2log']), Message)
| mv-expand ParsedLog
| extend ResidueLog = tostring(ParsedLog[8])
| extend Rlog = extract_all(@"[\s\S]*Action:\s'(?P<action>[^']+)'[\s\S]*Method:\s'(?P<method>[^']+)'[\s\S]*Result:\s(?P<result>[^']+)[\s\S]*Description:\s'(?P<description>[^']*)'", dynamic(['action', 'method', 'result', 'description']), ResidueLog)
| mv-expand Rlog
| extend PureLogType = ParsedLog[0], PureProcessID = ParsedLog[1], PureArrayName = ParsedLog[2], PureController = ParsedLog[3], PureInterface = ParsedLog[4], PureLogin = ParsedLog [5], PureLocation = ParsedLog [6], PureSublocation = ParsedLog [7], PureAction = Rlog [0], PureMethod = Rlog [1], PureResult = Rlog [2], PureDescription = Rlog [3]
| project-away ResidueLog, Rlog, ParsedLog
| summarize count() by tostring(PureLogin), tostring(PureArrayName), HostIP
| where count_ >= 10

relevantTechniques:
- T1212
suppressionDuration: 5h
kind: NRT
incidentConfiguration:
  groupingConfiguration:
    groupByAlertDetails: []
    enabled: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
    groupByCustomDetails: []
    reopenClosedIncident: false
    groupByEntities: []
  createIncident: true
suppressionEnabled: false
eventGroupingSettings:
  aggregationKind: SingleAlert
id: ed32b115-5001-43a7-a2bb-f53026db4d97
name: Pure Failed Login
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: HostIP
  entityType: IP
- fieldMappings:
  - identifier: Name
    columnName: PureLogin
  entityType: Account
- fieldMappings:
  - identifier: HostName
    columnName: PureArrayName
  entityType: Host
alertDetailsOverride:
  alertDynamicProperties: []
query: |-
  Syslog
  | where SyslogMessage has "purity.alert" and SyslogMessage has "invalid username or password"
  | extend Message = SyslogMessage
  | extend ParsedLog = extract_all(@"((?P<process>.*?)\[(?P<processid>.*?)\][\s\S]*?Array name:\s*'(?P<arrayname>\S+)'[\s\S]*?Controller:\s*'?(?P<controller>[^']+)'?[\s\S]*Interface:\s*'(?P<interface>\S+)'.*?User:\s'(?P<login>.*?)'\sLocation: '(?P<location>[^']+)'\sSublocation: '(?P<sublocation>[^']+)\s*(?P<part2log>[\s\S]*))", dynamic(['process', 'processid', 'arrayname', 'controller', 'interface','login', 'location', 'sublocation', 'part2log']), Message)
  | mv-expand ParsedLog
  | extend ResidueLog = tostring(ParsedLog[8])
  | extend Rlog = extract_all(@"[\s\S]*Action:\s'(?P<action>[^']+)'[\s\S]*Method:\s'(?P<method>[^']+)'[\s\S]*Result:\s(?P<result>[^']+)[\s\S]*Description:\s'(?P<description>[^']*)'", dynamic(['action', 'method', 'result', 'description']), ResidueLog)
  | mv-expand Rlog
  | extend PureLogType = ParsedLog[0], PureProcessID = ParsedLog[1], PureArrayName = ParsedLog[2], PureController = ParsedLog[3], PureInterface = ParsedLog[4], PureLogin = ParsedLog [5], PureLocation = ParsedLog [6], PureSublocation = ParsedLog [7], PureAction = Rlog [0], PureMethod = Rlog [1], PureResult = Rlog [2], PureDescription = Rlog [3]
  | project-away ResidueLog, Rlog, ParsedLog
  | summarize count() by tostring(PureLogin), tostring(PureArrayName), HostIP
  | where count_ >= 10  
severity: High
version: 1.0.0
description: Detect failed login attacks and delete user
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Pure Storage/Analytic Rules/PureFailedLogin.yaml
tactics:
- CredentialAccess

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/ed32b115-5001-43a7-a2bb-f53026db4d97')]",
      "kind": "NRT",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/ed32b115-5001-43a7-a2bb-f53026db4d97')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDynamicProperties": []
        },
        "alertRuleTemplateName": "ed32b115-5001-43a7-a2bb-f53026db4d97",
        "customDetails": null,
        "description": "Detect failed login attacks and delete user",
        "displayName": "Pure Failed Login",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "HostIP",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "PureLogin",
                "identifier": "Name"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "PureArrayName",
                "identifier": "HostName"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "SingleAlert"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": false,
            "groupByAlertDetails": [],
            "groupByCustomDetails": [],
            "groupByEntities": [],
            "lookbackDuration": "PT5H",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Pure Storage/Analytic Rules/PureFailedLogin.yaml",
        "query": "Syslog\n| where SyslogMessage has \"purity.alert\" and SyslogMessage has \"invalid username or password\"\n| extend Message = SyslogMessage\n| extend ParsedLog = extract_all(@\"((?P<process>.*?)\\[(?P<processid>.*?)\\][\\s\\S]*?Array name:\\s*'(?P<arrayname>\\S+)'[\\s\\S]*?Controller:\\s*'?(?P<controller>[^']+)'?[\\s\\S]*Interface:\\s*'(?P<interface>\\S+)'.*?User:\\s'(?P<login>.*?)'\\sLocation: '(?P<location>[^']+)'\\sSublocation: '(?P<sublocation>[^']+)\\s*(?P<part2log>[\\s\\S]*))\", dynamic(['process', 'processid', 'arrayname', 'controller', 'interface','login', 'location', 'sublocation', 'part2log']), Message)\n| mv-expand ParsedLog\n| extend ResidueLog = tostring(ParsedLog[8])\n| extend Rlog = extract_all(@\"[\\s\\S]*Action:\\s'(?P<action>[^']+)'[\\s\\S]*Method:\\s'(?P<method>[^']+)'[\\s\\S]*Result:\\s(?P<result>[^']+)[\\s\\S]*Description:\\s'(?P<description>[^']*)'\", dynamic(['action', 'method', 'result', 'description']), ResidueLog)\n| mv-expand Rlog\n| extend PureLogType = ParsedLog[0], PureProcessID = ParsedLog[1], PureArrayName = ParsedLog[2], PureController = ParsedLog[3], PureInterface = ParsedLog[4], PureLogin = ParsedLog [5], PureLocation = ParsedLog [6], PureSublocation = ParsedLog [7], PureAction = Rlog [0], PureMethod = Rlog [1], PureResult = Rlog [2], PureDescription = Rlog [3]\n| project-away ResidueLog, Rlog, ParsedLog\n| summarize count() by tostring(PureLogin), tostring(PureArrayName), HostIP\n| where count_ >= 10",
        "severity": "High",
        "suppressionDuration": "PT5H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess"
        ],
        "techniques": [
          "T1212"
        ],
        "templateVersion": "1.0.0"
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}