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Detect when an attacker accesses your AWS account from their AWS Account.
This rule lets you monitor AssumeRole (@evt.name:AssumeRole
) CloudTrail API calls to detect when an external AWS account (@userIdentity.accountId
) assumes a role into your AWS account (account
). It does this by learning all AWS accounts from which the AssumeRole call occurs within a 7-day window. Newly detected accounts after this 7-day window will generate security signals.
@userIdentity.accountId
is an AWS account is managed by your company.7 April 2022 - Updated rule query and signal message.