{"id":"7a4409fc-f8ca-45f6-8006-127d779eaad9","title":"LoadBalancer Security Group Modification","description":"Detects changes to the security groups associated with an Elastic Load Balancer (ELB) or Application Load Balancer (ALB).\nThis can indicate that a misconfiguration allowing more traffic into the system than required, or could indicate that an attacker is attempting to enable new connections into a VPC or subnet controlled by the account.\n","author":"jamesc-grafana","status":"test","level":"medium","date":"2024-07-11","modified":"","tags":["attack.initial-access","attack.t1190"],"technique_ids":["T1190"],"logsource":{"product":"aws","service":"cloudtrail"},"falsepositives":["Repurposing of an ELB or ALB to serve a different or additional application","Changes to security groups to allow for new services to be deployed"],"references":["https://www.gorillastack.com/blog/real-time-events/important-aws-cloudtrail-security-events-tracking/"],"source_path":"rules/cloud/aws/cloudtrail/aws_cloudtrail_security_group_change_loadbalancer.yml","source_sha256":"5e26345487b7466b63cb10d2f976461b6b6c6882ae2d791da54fe01a4fb2bc41","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/cloud/aws/cloudtrail/aws_cloudtrail_security_group_change_loadbalancer.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: LoadBalancer Security Group Modification\nid: 7a4409fc-f8ca-45f6-8006-127d779eaad9\nstatus: test\ndescription: |\n    Detects changes to the security groups associated with an Elastic Load Balancer (ELB) or Application Load Balancer (ALB).\n    This can indicate that a misconfiguration allowing more traffic into the system than required, or could indicate that an attacker is attempting to enable new connections into a VPC or subnet controlled by the account.\nreferences:\n    - https://www.gorillastack.com/blog/real-time-events/important-aws-cloudtrail-security-events-tracking/\nauthor: jamesc-grafana\ndate: 2024-07-11\ntags:\n    - attack.initial-access\n    - attack.t1190\nlogsource:\n    product: aws\n    service: cloudtrail\ndetection:\n    selection:\n        eventSource: 'elasticloadbalancing.amazonaws.com'\n        eventName:\n            - 'ApplySecurityGroupsToLoadBalancer'\n            - 'SetSecurityGroups'\n    condition: selection\nfalsepositives:\n    - Repurposing of an ELB or ALB to serve a different or additional application\n    - Changes to security groups to allow for new services to be deployed\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1190","id":"T1190","name":"Exploit Public-Facing Application","page":"techniques/enterprise/T1190/"}],"data_path":"data/detection-rules/7a4409fc-f8ca-45f6-8006-127d779eaad9.json","kind":"sigma"}