AWSCloudTrail - AWS GuardDuty detector disabled or suspended

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Id	9da99021-d318-4711-a78a-6dea76129b3a
Rulename	AWSCloudTrail - AWS GuardDuty detector disabled or suspended
Description	Identifies AWS GuardDuty detectors being disabled or suspended. This behavior can indicate defense evasion and should be validated with the initiating identity and approved administrative activity.
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	1.0.3
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]), "")

YAML

entityMappings:
- fieldMappings:
  - columnName: AccountName
    identifier: Name
  - columnName: AccountUPNSuffix
    identifier: UPNSuffix
  - columnName: RecipientAccountId
    identifier: CloudAppAccountId
  entityType: Account
- fieldMappings:
  - columnName: SourceIpAddress
    identifier: Address
  entityType: IP
triggerOperator: gt
tactics:
- DefenseEvasion
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_GuardDutyDisabled.yaml
alertDetailsOverride:
  alertDescriptionFormat: AWS GuardDuty detector activity {{EventName}} was detected for {{AccountName}} from {{SourceIpAddress}}.
  alertDisplayNameFormat: AWS GuardDuty detector disabled or suspended by {{AccountName}}
version: 1.0.3
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]), "")  
triggerThreshold: 0
relevantTechniques:
- T1562
queryPeriod: 1d
status: Available
severity: High
kind: Scheduled
customDetails:
  SourceIpAddress: SourceIpAddress
  UserName: UserName
  EventName: EventName
  UserIdentityArn: UserIdentityArn
name: AWSCloudTrail - AWS GuardDuty detector disabled or suspended
queryFrequency: 1d
id: 9da99021-d318-4711-a78a-6dea76129b3a
description: |
    Identifies AWS GuardDuty detectors being disabled or suspended. This behavior can indicate defense evasion and should be validated with the initiating identity and approved administrative activity.
requiredDataConnectors:
- dataTypes:
  - AWSCloudTrail
  connectorId: AWS

ARM