GuardDuty detector disabled or suspended

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Id	9da99021-d318-4711-a78a-6dea76129b3a
Rulename	GuardDuty detector disabled or suspended
Description	GuardDuty Detector was disabled or suspended, possibly by an attacker trying to avoid detection of its malicious activities. Verify with the user identity that this activity is legitimate.
Severity	High
Tactics	DefenseEvasion
Techniques	T1562
Required data connectors	AWS
Kind	Scheduled
Query frequency	1d
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_GuardDutyDisabled.yaml
Version	1.0.2
Arm template	9da99021-d318-4711-a78a-6dea76129b3a.json

KQL

AWSCloudTrail
| where (EventName == "DeleteDetector" and isempty(ErrorCode) and isempty( ErrorMessage)) or (EventName == "UpdateDetector" and tostring(parse_json(RequestParameters).enable) == "false" and isempty(ErrorCode) and isempty( ErrorMessage))
| extend UserIdentityArn = iif(isempty(UserIdentityArn), tostring(parse_json(Resources)[0].ARN), UserIdentityArn)
| extend UserName = tostring(split(UserIdentityArn, '/')[-1])
| extend AccountName = case( UserIdentityPrincipalid == "Anonymous", "Anonymous", isempty(UserIdentityUserName), UserName, UserIdentityUserName)
| extend AccountName = iif(AccountName contains "@", tostring(split(AccountName, '@', 0)[0]), AccountName),
  AccountUPNSuffix = iif(AccountName contains "@", tostring(split(AccountName, '@', 1)[0]), "")
| extend timestamp = TimeGenerated

YAML

id: 9da99021-d318-4711-a78a-6dea76129b3a
tactics:
- DefenseEvasion
queryPeriod: 1d
triggerThreshold: 0
name: GuardDuty detector disabled or suspended
query: |
  AWSCloudTrail
  | where (EventName == "DeleteDetector" and isempty(ErrorCode) and isempty( ErrorMessage)) or (EventName == "UpdateDetector" and tostring(parse_json(RequestParameters).enable) == "false" and isempty(ErrorCode) and isempty( ErrorMessage))
  | extend UserIdentityArn = iif(isempty(UserIdentityArn), tostring(parse_json(Resources)[0].ARN), UserIdentityArn)
  | extend UserName = tostring(split(UserIdentityArn, '/')[-1])
  | extend AccountName = case( UserIdentityPrincipalid == "Anonymous", "Anonymous", isempty(UserIdentityUserName), UserName, UserIdentityUserName)
  | extend AccountName = iif(AccountName contains "@", tostring(split(AccountName, '@', 0)[0]), AccountName),
    AccountUPNSuffix = iif(AccountName contains "@", tostring(split(AccountName, '@', 1)[0]), "")
  | extend timestamp = TimeGenerated  
severity: High
triggerOperator: gt
kind: Scheduled
relevantTechniques:
- T1562
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_GuardDutyDisabled.yaml
queryFrequency: 1d
requiredDataConnectors:
- connectorId: AWS
  dataTypes:
  - AWSCloudTrail
description: |
    'GuardDuty Detector was disabled or suspended, possibly by an attacker trying to avoid detection of its malicious activities. Verify with the user identity that this activity is legitimate.'
status: Available
version: 1.0.2
entityMappings:
- fieldMappings:
  - columnName: AccountName
    identifier: Name
  - columnName: AccountUPNSuffix
    identifier: UPNSuffix
  - columnName: RecipientAccountId
    identifier: CloudAppAccountId
  entityType: Account
- fieldMappings:
  - columnName: SourceIpAddress
    identifier: Address
  entityType: IP

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/9da99021-d318-4711-a78a-6dea76129b3a')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9da99021-d318-4711-a78a-6dea76129b3a')]",
      "properties": {
        "alertRuleTemplateName": "9da99021-d318-4711-a78a-6dea76129b3a",
        "customDetails": null,
        "description": "'GuardDuty Detector was disabled or suspended, possibly by an attacker trying to avoid detection of its malicious activities. Verify with the user identity that this activity is legitimate.'\n",
        "displayName": "GuardDuty detector disabled or suspended",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountUPNSuffix",
                "identifier": "UPNSuffix"
              },
              {
                "columnName": "RecipientAccountId",
                "identifier": "CloudAppAccountId"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIpAddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_GuardDutyDisabled.yaml",
        "query": "AWSCloudTrail\n| where (EventName == \"DeleteDetector\" and isempty(ErrorCode) and isempty( ErrorMessage)) or (EventName == \"UpdateDetector\" and tostring(parse_json(RequestParameters).enable) == \"false\" and isempty(ErrorCode) and isempty( ErrorMessage))\n| extend UserIdentityArn = iif(isempty(UserIdentityArn), tostring(parse_json(Resources)[0].ARN), UserIdentityArn)\n| extend UserName = tostring(split(UserIdentityArn, '/')[-1])\n| extend AccountName = case( UserIdentityPrincipalid == \"Anonymous\", \"Anonymous\", isempty(UserIdentityUserName), UserName, UserIdentityUserName)\n| extend AccountName = iif(AccountName contains \"@\", tostring(split(AccountName, '@', 0)[0]), AccountName),\n  AccountUPNSuffix = iif(AccountName contains \"@\", tostring(split(AccountName, '@', 1)[0]), \"\")\n| extend timestamp = TimeGenerated\n",
        "queryFrequency": "P1D",
        "queryPeriod": "P1D",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "DefenseEvasion"
        ],
        "techniques": [
          "T1562"
        ],
        "templateVersion": "1.0.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}