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AWS Concurrent Sessions From Different Ips - Splunk Security Content

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The following analytic identifies an AWS IAM account with concurrent sessions coming from more than one unique IP address within the span of 5 minutes. This behavior could represent a session hijacking attack whereby an adversary has extracted cookies from a victims browser and is using them from a different location to access corporate online resources. When a user navigates the AWS Console after authentication, the API call with the event name DescribeEventAggregates is registered in the AWS CloudTrail logs. The Splunk Threat Research team leveraged this event name to identify 2 concurrent sessions. The presence of this event occurring from two different IP addresses is highly unlikely. As users may behave differently across organizations, security teams should test and customize this detection to fit their environments. Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud The SPL above uses the following Macros: aws_concurrent_sessions_from_different_ips_filter is a

Detection: AWS Concurrent Sessions From Different Ips | Splunk Security Content Table of Contents Detection: AWS Concurrent Sessions From Different Ips Updated Date: 2026-05-13 ID: 51c04fdb-2746-465a-b86e-b413a09c9085 Author: Bhavin Patel, Splunk Type: TTP Product: Splunk Enterprise Security Description The following analytic identifies an AWS IAM account with concurrent sessions originating from more than one unique IP address within a 5-minute window. It leverages AWS CloudTrail logs, specifically the DescribeEventAggregates event, to detect this behavior. This activity is significant as it

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