AWSCloudTrail - AWS GuardDuty detector disabled or suspended

Back


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

ARM