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How does Push help detect session token theft?

Push provides a security control configurable by administrators that allows you to inject a unique marker into the User Agent string of sessions that occur in browsers enrolled in Push. This feature is powered by the Push browser agent.

By analyzing logs in the target app, you can identify sessions that both have the Push marker and that lack the marker, indicating the session is being used from both a machine with the extension and a machine without and therefore the session token may have been stolen.

Note: While Push can inject the unique marker into sessions on any domains you specify, the identity provider or application must provide a server-side session identifier so that you can determine which activity belongs to the same session, and then identify whether a marker is absent from activity on Push-enrolled browsers where you expect it to be present.

Illustration of session theft detection - KB 10114
Illustration of detected session activity showing the missing Push marker

Any “unmarked” activity in the same session should be treated as a high-fidelity signal of session token theft, also known as session hijacking.

How to configure session token theft detection

You can enable session token theft detection in the Push admin console by going to Controls > Session token theft detection.

From the slideout panel, you can generate or refresh a unique marker to monitor for.

Session token theft detection config screen - KB 10114

Then add the list of domains where you wish to inject the marker into sessions, such as your identity provider or other important applications that provide both a server-side identifier and the User Agent in logs.

Push’s research has identified that Okta and Microsoft both provide logs that display the User Agent and a server-side identifier.

If you use a custom domain for Okta, be sure to add <your subdomain> to the list of configured domains.

To find a list of Microsoft domains, refer to Microsoft’s documentation.

Here is an example User Agent string showing the Push marker appended:

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ Safari/537.36 PS_dk4b2ht