Techniques
Sample rules
AWS Disable Bucket Versioning
- source: splunk
- technicques:
- T1490
Description
The following analytic detects when AWS S3 bucket versioning is suspended by a user. It leverages AWS CloudTrail logs to identify PutBucketVersioning events with the VersioningConfiguration.Status set to Suspended. This activity is significant because disabling versioning can prevent recovery of deleted or modified data, which is a common tactic in ransomware attacks. If confirmed malicious, this action could lead to data loss and hinder recovery efforts, severely impacting data integrity and availability.
Detection logic
`cloudtrail` eventName= PutBucketVersioning "requestParameters.VersioningConfiguration.Status"=Suspended
| stats count values(requestParameters.bucketName) as bucket_name values(resources{}.ARN) as resource_arn by src_ip aws_account_id awsRegion eventName userAgent user_arn userIdentity.principalId errorCode
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `aws_disable_bucket_versioning_filter`
ASL AWS Disable Bucket Versioning
- source: splunk
- technicques:
- T1490
Description
The following analytic detects when AWS S3 bucket versioning is suspended by a user. It leverages AWS CloudTrail logs to identify PutBucketVersioning events with the VersioningConfiguration.Status set to Suspended. This activity is significant because disabling versioning can prevent recovery of deleted or modified data, which is a common tactic in ransomware attacks. If confirmed malicious, this action could lead to data loss and hinder recovery efforts, severely impacting data integrity and availability.
Detection logic
`amazon_security_lake` api.operation=PutBucketVersioning
| spath input=api.request.data path=VersioningConfiguration.Status output=Status
| spath input=api.request.data path=bucketName output=bucketName
| search Status=Suspended
| fillnull
| stats count min(_time) as firstTime max(_time) as lastTime by api.operation actor.user.uid actor.user.account.uid http_request.user_agent src_endpoint.ip cloud.region api.request.data bucketName
| rename actor.user.uid as user, src_endpoint.ip as src_ip, cloud.region as region, http_request.user_agent as user_agent
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `asl_aws_disable_bucket_versioning_filter`