{"id":"db014773-d9d9-4792-91e5-133337c0ffee","title":"AWS IAM S3Browser User or AccessKey Creation","description":"Detects S3 Browser utility creating IAM User or AccessKey.","author":"daniel.bohannon@permiso.io (@danielhbohannon)","status":"test","level":"high","date":"2023-05-17","modified":"","tags":["attack.privilege-escalation","attack.execution","attack.persistence","attack.initial-access","attack.stealth","attack.t1059.009","attack.t1078.004"],"technique_ids":["T1059.009","T1078.004"],"logsource":{"product":"aws","service":"cloudtrail"},"falsepositives":["Valid usage of S3 Browser for IAM User and/or AccessKey creation"],"references":["https://permiso.io/blog/s/unmasking-guivil-new-cloud-threat-actor"],"source_path":"rules/cloud/aws/cloudtrail/aws_iam_s3browser_user_or_accesskey_creation.yml","source_sha256":"c566f779298d219eb9733ec7db1e554ff269f748f71b3fffd4eb9ff09adf53fe","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/aws/cloudtrail/aws_iam_s3browser_user_or_accesskey_creation.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: AWS IAM S3Browser User or AccessKey Creation\nid: db014773-d9d9-4792-91e5-133337c0ffee\nstatus: test\ndescription: Detects S3 Browser utility creating IAM User or AccessKey.\nreferences:\n    - https://permiso.io/blog/s/unmasking-guivil-new-cloud-threat-actor\nauthor: daniel.bohannon@permiso.io (@danielhbohannon)\ndate: 2023-05-17\ntags:\n    - attack.privilege-escalation\n    - attack.execution\n    - attack.persistence\n    - attack.initial-access\n    - attack.stealth\n    - attack.t1059.009\n    - attack.t1078.004\nlogsource:\n    product: aws\n    service: cloudtrail\ndetection:\n    selection:\n        eventSource: 'iam.amazonaws.com'\n        eventName:\n            - 'CreateUser'\n            - 'CreateAccessKey'\n        userAgent|contains: 'S3 Browser'\n    condition: selection\nfalsepositives:\n    - Valid usage of S3 Browser for IAM User and/or AccessKey creation\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1059.009","id":"T1059.009","name":"Cloud API","page":"techniques/enterprise/T1059.009/"},{"key":"enterprise/T1078.004","id":"T1078.004","name":"Cloud Accounts","page":"techniques/enterprise/T1078.004/"}],"data_path":"data/detection-rules/db014773-d9d9-4792-91e5-133337c0ffee.json","kind":"sigma"}