diff --git a/detections/cloud/detect_spike_in_aws_security_hub_alerts_for_ec2_instance.yml b/detections/cloud/detect_spike_in_aws_security_hub_alerts_for_ec2_instance.yml index 489352502b..b7a125bd2e 100644 --- a/detections/cloud/detect_spike_in_aws_security_hub_alerts_for_ec2_instance.yml +++ b/detections/cloud/detect_spike_in_aws_security_hub_alerts_for_ec2_instance.yml @@ -2,22 +2,22 @@ name: Detect Spike in AWS Security Hub Alerts for EC2 Instance id: 2a9b80d3-6340-4345-b5ad-290bf5d0d222 version: 3 date: '2021-01-26' -description: This search looks for a spike in number of of AWS security Hub alerts for an EC2 instance in 4 hours intervals +description: This search looks for a spike in number of of AWS security Hub alerts + for an EC2 instance in 4 hours intervals how_to_implement: You must install the AWS App for Splunk (version 5.1.0 or later) - and Splunk Add-on for AWS (version 4.4.0 or later), then configure your Security Hub - inputs. The threshold_value should be tuned to your environment and schedule these searches according to the bucket span interval. + and Splunk Add-on for AWS (version 4.4.0 or later), then configure your Security + Hub inputs. The threshold_value should be tuned to your environment and schedule + these searches according to the bucket span interval. type: ESCU references: [] author: Bhavin Patel, Splunk -search: '`aws_securityhub_finding` "Resources{}.Type"=AWSEC2Instance -| bucket span=4h _time -| stats count AS alerts values(Title) as Title values(Types{}) as Types values(vendor_account) as vendor_account values(vendor_region) as vendor_region values(severity) as severity by _time dest -| eventstats avg(alerts) as total_alerts_avg, stdev(alerts) as total_alerts_stdev -| eval threshold_value = 3 -| eval isOutlier=if(alerts > total_alerts_avg+(total_alerts_stdev * threshold_value), 1, 0) -| search isOutlier=1 -| table _time dest alerts Title Types vendor_account vendor_region severity isOutlier total_alerts_avg -| `detect_spike_in_aws_security_hub_alerts_for_ec2_instance_filter`' +search: '`aws_securityhub_finding` "Resources{}.Type"=AWSEC2Instance | bucket span=4h + _time | stats count AS alerts values(Title) as Title values(Types{}) as Types values(vendor_account) + as vendor_account values(vendor_region) as vendor_region values(severity) as severity + by _time dest | eventstats avg(alerts) as total_alerts_avg, stdev(alerts) as total_alerts_stdev + | eval threshold_value = 3 | eval isOutlier=if(alerts > total_alerts_avg+(total_alerts_stdev + * threshold_value), 1, 0) | search isOutlier=1 | table _time dest alerts Title Types + vendor_account vendor_region severity isOutlier total_alerts_avg | `detect_spike_in_aws_security_hub_alerts_for_ec2_instance_filter`' known_false_positives: None tags: analytics_story: @@ -29,3 +29,6 @@ tags: - DE.AE security_domain: network asset_type: AWS Instance + automated_detection_testing: passed + dataset: + - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/suspicious_behaviour/security_hub_ec2_spike/security_hub_ec2_spike.json