User account created and deleted within 10 mins

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Id	4b93c5af-d20b-4236-b696-a28b8c51407f
Rulename	User account created and deleted within 10 mins
Description	Identifies when a user account is created and then deleted within 10 minutes. This can be an indication of compromise and an adversary attempting to hide in the noise.
Severity	Medium
Tactics	Persistence PrivilegeEscalation
Techniques	T1098 T1078
Required data connectors	SecurityEvents WindowsForwardedEvents WindowsSecurityEvents
Kind	Scheduled
Query frequency	1d
Query period	25h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityEvent/UserAccountCreatedDeleted_10m.yaml
Version	1.1.2
Arm template	4b93c5af-d20b-4236-b696-a28b8c51407f.json

KQL

let timeframe = 1d;
let spanoftime = 10m;
let threshold = 0;
 (union isfuzzy=true
 (SecurityEvent
| where TimeGenerated > ago(timeframe+spanoftime)
// A user account was created
| where EventID == 4720
| where AccountType =~ "User"
| project creationTime = TimeGenerated, CreateEventID = EventID, CreateActivity = Activity, Computer, TargetUserName, UserPrincipalName, 
AccountUsedToCreate = SubjectAccount, SIDofAccountUsedToCreate = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid
),
(
WindowsEvent
| where TimeGenerated > ago(timeframe+spanoftime)
// A user account was created
| where EventID == 4720
| extend SubjectUserSid = tostring(EventData.SubjectUserSid)
| extend AccountType=case(EventData.SubjectUserName endswith "$" or SubjectUserSid in ("S-1-5-18", "S-1-5-19", "S-1-5-20"), "Machine", isempty(SubjectUserSid), "", "User")
| where AccountType =~ "User"
| extend SubjectAccount = strcat(tostring(EventData.SubjectDomainName),"\\", tostring(EventData.SubjectUserName))
| extend TargetAccount = strcat(EventData.TargetDomainName,"\\", EventData.TargetUserName)
| extend TargetSid = tostring(EventData.TargetSid)
| extend UserPrincipalName = tostring(EventData.UserPrincipalName)
| extend Activity = "4720 - A user account was created."
| extend TargetUserName = tostring(EventData.TargetUserName) 
| project creationTime = TimeGenerated, CreateEventID = EventID, CreateActivity = Activity, Computer, TargetUserName, UserPrincipalName, 
AccountUsedToCreate = SubjectAccount, SIDofAccountUsedToCreate = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid  
))
| join kind= inner (
  (union isfuzzy=true
  (SecurityEvent
  | where TimeGenerated > ago(timeframe)
  // A user account was deleted
  | where EventID == 4726
| where AccountType == "User"
| project deletionTime = TimeGenerated, DeleteEventID = EventID, DeleteActivity = Activity, Computer, TargetUserName, UserPrincipalName, 
AccountUsedToDelete = SubjectAccount, SIDofAccountUsedToDelete = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid
),
(WindowsEvent
| where TimeGenerated > ago(timeframe)
  // A user account was deleted
| where EventID == 4726
| extend SubjectUserSid = tostring(EventData.SubjectUserSid)
| extend SubjectAccount = strcat(tostring(EventData.SubjectDomainName),"\\", tostring(EventData.SubjectUserName))
| extend AccountType=case(SubjectAccount endswith "$" or SubjectUserSid in ("S-1-5-18", "S-1-5-19", "S-1-5-20"), "Machine", isempty(SubjectUserSid), "", "User")
| where AccountType == "User"
| extend TargetSid = tostring(EventData.TargetSid)
| extend UserPrincipalName = tostring(EventData.UserPrincipalName)
| extend Activity = "4726 - A user account was deleted."
| extend TargetUserName = tostring(EventData.TargetUserName) 
| extend TargetAccount = strcat(EventData.TargetDomainName,"\\", EventData.TargetUserName)
| project deletionTime = TimeGenerated, DeleteEventID = EventID, DeleteActivity = Activity, Computer, TargetUserName, UserPrincipalName, AccountUsedToDelete = SubjectAccount, SIDofAccountUsedToDelete = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid))
) on Computer, TargetAccount
| where deletionTime - creationTime < spanoftime
| extend TimeDelta = deletionTime - creationTime
| where tolong(TimeDelta) >= threshold
| project TimeDelta, creationTime, CreateEventID, CreateActivity, Computer, TargetAccount, TargetSid, UserPrincipalName, AccountUsedToCreate, SIDofAccountUsedToCreate,
deletionTime, DeleteEventID, DeleteActivity, AccountUsedToDelete, SIDofAccountUsedToDelete
| extend timestamp = creationTime, AccountCustomEntity = AccountUsedToCreate, HostCustomEntity = Computer

YAML

severity: Medium
triggerThreshold: 0
metadata:
  source:
    kind: Community
  support:
    tier: Community
  categories:
    domains:
    - Security - Others
    - Identity
  author:
    name: Shain
queryFrequency: 1d
requiredDataConnectors:
- connectorId: SecurityEvents
  dataTypes:
  - SecurityEvent
- connectorId: WindowsSecurityEvents
  dataTypes:
  - SecurityEvent
- connectorId: WindowsForwardedEvents
  dataTypes:
  - WindowsEvent
id: 4b93c5af-d20b-4236-b696-a28b8c51407f
version: 1.1.2
name: User account created and deleted within 10 mins
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityEvent/UserAccountCreatedDeleted_10m.yaml
queryPeriod: 25h
relevantTechniques:
- T1098
- T1078
triggerOperator: gt
tactics:
- Persistence
- PrivilegeEscalation
query: |
  let timeframe = 1d;
  let spanoftime = 10m;
  let threshold = 0;
   (union isfuzzy=true
   (SecurityEvent
  | where TimeGenerated > ago(timeframe+spanoftime)
  // A user account was created
  | where EventID == 4720
  | where AccountType =~ "User"
  | project creationTime = TimeGenerated, CreateEventID = EventID, CreateActivity = Activity, Computer, TargetUserName, UserPrincipalName, 
  AccountUsedToCreate = SubjectAccount, SIDofAccountUsedToCreate = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid
  ),
  (
  WindowsEvent
  | where TimeGenerated > ago(timeframe+spanoftime)
  // A user account was created
  | where EventID == 4720
  | extend SubjectUserSid = tostring(EventData.SubjectUserSid)
  | extend AccountType=case(EventData.SubjectUserName endswith "$" or SubjectUserSid in ("S-1-5-18", "S-1-5-19", "S-1-5-20"), "Machine", isempty(SubjectUserSid), "", "User")
  | where AccountType =~ "User"
  | extend SubjectAccount = strcat(tostring(EventData.SubjectDomainName),"\\", tostring(EventData.SubjectUserName))
  | extend TargetAccount = strcat(EventData.TargetDomainName,"\\", EventData.TargetUserName)
  | extend TargetSid = tostring(EventData.TargetSid)
  | extend UserPrincipalName = tostring(EventData.UserPrincipalName)
  | extend Activity = "4720 - A user account was created."
  | extend TargetUserName = tostring(EventData.TargetUserName) 
  | project creationTime = TimeGenerated, CreateEventID = EventID, CreateActivity = Activity, Computer, TargetUserName, UserPrincipalName, 
  AccountUsedToCreate = SubjectAccount, SIDofAccountUsedToCreate = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid  
  ))
  | join kind= inner (
    (union isfuzzy=true
    (SecurityEvent
    | where TimeGenerated > ago(timeframe)
    // A user account was deleted
    | where EventID == 4726
  | where AccountType == "User"
  | project deletionTime = TimeGenerated, DeleteEventID = EventID, DeleteActivity = Activity, Computer, TargetUserName, UserPrincipalName, 
  AccountUsedToDelete = SubjectAccount, SIDofAccountUsedToDelete = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid
  ),
  (WindowsEvent
  | where TimeGenerated > ago(timeframe)
    // A user account was deleted
  | where EventID == 4726
  | extend SubjectUserSid = tostring(EventData.SubjectUserSid)
  | extend SubjectAccount = strcat(tostring(EventData.SubjectDomainName),"\\", tostring(EventData.SubjectUserName))
  | extend AccountType=case(SubjectAccount endswith "$" or SubjectUserSid in ("S-1-5-18", "S-1-5-19", "S-1-5-20"), "Machine", isempty(SubjectUserSid), "", "User")
  | where AccountType == "User"
  | extend TargetSid = tostring(EventData.TargetSid)
  | extend UserPrincipalName = tostring(EventData.UserPrincipalName)
  | extend Activity = "4726 - A user account was deleted."
  | extend TargetUserName = tostring(EventData.TargetUserName) 
  | extend TargetAccount = strcat(EventData.TargetDomainName,"\\", EventData.TargetUserName)
  | project deletionTime = TimeGenerated, DeleteEventID = EventID, DeleteActivity = Activity, Computer, TargetUserName, UserPrincipalName, AccountUsedToDelete = SubjectAccount, SIDofAccountUsedToDelete = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid))
  ) on Computer, TargetAccount
  | where deletionTime - creationTime < spanoftime
  | extend TimeDelta = deletionTime - creationTime
  | where tolong(TimeDelta) >= threshold
  | project TimeDelta, creationTime, CreateEventID, CreateActivity, Computer, TargetAccount, TargetSid, UserPrincipalName, AccountUsedToCreate, SIDofAccountUsedToCreate,
  deletionTime, DeleteEventID, DeleteActivity, AccountUsedToDelete, SIDofAccountUsedToDelete
  | extend timestamp = creationTime, AccountCustomEntity = AccountUsedToCreate, HostCustomEntity = Computer  
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: AccountCustomEntity
  - identifier: Sid
    columnName: SIDofAccountUsedToCreate
- entityType: Host
  fieldMappings:
  - identifier: FullName
    columnName: HostCustomEntity
description: |
  'Identifies when a user account is created and then deleted within 10 minutes. This can be an indication of compromise and
  an adversary attempting to hide in the noise.'

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/4b93c5af-d20b-4236-b696-a28b8c51407f')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4b93c5af-d20b-4236-b696-a28b8c51407f')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "User account created and deleted within 10 mins",
        "description": "'Identifies when a user account is created and then deleted within 10 minutes. This can be an indication of compromise and\nan adversary attempting to hide in the noise.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "let timeframe = 1d;\nlet spanoftime = 10m;\nlet threshold = 0;\n (union isfuzzy=true\n (SecurityEvent\n| where TimeGenerated > ago(timeframe+spanoftime)\n// A user account was created\n| where EventID == 4720\n| where AccountType =~ \"User\"\n| project creationTime = TimeGenerated, CreateEventID = EventID, CreateActivity = Activity, Computer, TargetUserName, UserPrincipalName, \nAccountUsedToCreate = SubjectAccount, SIDofAccountUsedToCreate = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid\n),\n(\nWindowsEvent\n| where TimeGenerated > ago(timeframe+spanoftime)\n// A user account was created\n| where EventID == 4720\n| extend SubjectUserSid = tostring(EventData.SubjectUserSid)\n| extend AccountType=case(EventData.SubjectUserName endswith \"$\" or SubjectUserSid in (\"S-1-5-18\", \"S-1-5-19\", \"S-1-5-20\"), \"Machine\", isempty(SubjectUserSid), \"\", \"User\")\n| where AccountType =~ \"User\"\n| extend SubjectAccount = strcat(tostring(EventData.SubjectDomainName),\"\\\\\", tostring(EventData.SubjectUserName))\n| extend TargetAccount = strcat(EventData.TargetDomainName,\"\\\\\", EventData.TargetUserName)\n| extend TargetSid = tostring(EventData.TargetSid)\n| extend UserPrincipalName = tostring(EventData.UserPrincipalName)\n| extend Activity = \"4720 - A user account was created.\"\n| extend TargetUserName = tostring(EventData.TargetUserName) \n| project creationTime = TimeGenerated, CreateEventID = EventID, CreateActivity = Activity, Computer, TargetUserName, UserPrincipalName, \nAccountUsedToCreate = SubjectAccount, SIDofAccountUsedToCreate = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid  \n))\n| join kind= inner (\n  (union isfuzzy=true\n  (SecurityEvent\n  | where TimeGenerated > ago(timeframe)\n  // A user account was deleted\n  | where EventID == 4726\n| where AccountType == \"User\"\n| project deletionTime = TimeGenerated, DeleteEventID = EventID, DeleteActivity = Activity, Computer, TargetUserName, UserPrincipalName, \nAccountUsedToDelete = SubjectAccount, SIDofAccountUsedToDelete = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid\n),\n(WindowsEvent\n| where TimeGenerated > ago(timeframe)\n  // A user account was deleted\n| where EventID == 4726\n| extend SubjectUserSid = tostring(EventData.SubjectUserSid)\n| extend SubjectAccount = strcat(tostring(EventData.SubjectDomainName),\"\\\\\", tostring(EventData.SubjectUserName))\n| extend AccountType=case(SubjectAccount endswith \"$\" or SubjectUserSid in (\"S-1-5-18\", \"S-1-5-19\", \"S-1-5-20\"), \"Machine\", isempty(SubjectUserSid), \"\", \"User\")\n| where AccountType == \"User\"\n| extend TargetSid = tostring(EventData.TargetSid)\n| extend UserPrincipalName = tostring(EventData.UserPrincipalName)\n| extend Activity = \"4726 - A user account was deleted.\"\n| extend TargetUserName = tostring(EventData.TargetUserName) \n| extend TargetAccount = strcat(EventData.TargetDomainName,\"\\\\\", EventData.TargetUserName)\n| project deletionTime = TimeGenerated, DeleteEventID = EventID, DeleteActivity = Activity, Computer, TargetUserName, UserPrincipalName, AccountUsedToDelete = SubjectAccount, SIDofAccountUsedToDelete = SubjectUserSid, TargetAccount = tolower(TargetAccount), TargetSid))\n) on Computer, TargetAccount\n| where deletionTime - creationTime < spanoftime\n| extend TimeDelta = deletionTime - creationTime\n| where tolong(TimeDelta) >= threshold\n| project TimeDelta, creationTime, CreateEventID, CreateActivity, Computer, TargetAccount, TargetSid, UserPrincipalName, AccountUsedToCreate, SIDofAccountUsedToCreate,\ndeletionTime, DeleteEventID, DeleteActivity, AccountUsedToDelete, SIDofAccountUsedToDelete\n| extend timestamp = creationTime, AccountCustomEntity = AccountUsedToCreate, HostCustomEntity = Computer\n",
        "queryFrequency": "P1D",
        "queryPeriod": "PT25H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence",
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1098",
          "T1078"
        ],
        "alertRuleTemplateName": "4b93c5af-d20b-4236-b696-a28b8c51407f",
        "customDetails": null,
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "FullName"
              },
              {
                "columnName": "SIDofAccountUsedToCreate",
                "identifier": "Sid"
              }
            ],
            "entityType": "Account"
          },
          {
            "fieldMappings": [
              {
                "columnName": "HostCustomEntity",
                "identifier": "FullName"
              }
            ],
            "entityType": "Host"
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityEvent/UserAccountCreatedDeleted_10m.yaml",
        "templateVersion": "1.1.2"
      }
    }
  ]
}