The Customer ID value also exists in the payload stage, but it's more steps to recover. The last 4-bytes of this stager (0x0, 0x0, 0x0, 0x0) reflect this.įigure 2 - HTTP Payload Stager ( Cobalt Strike Trial) This screenshot is the HTTP stager from the trial. The Customer ID value is the last 4-bytes of a Cobalt Strike payload stager in Cobalt Strike 3.9 and later. How do I find the Customer ID value in a Cobalt Strike artifact? Cobalt Strike 3.9 and later embed this information into the payload stagers and stages generated by Cobalt Strike. The Customer ID is a 4-byte number associated with a Cobalt Strike license key. Then copy the authorization file to your Cobalt Strike installation directory. ![]() Use the download link to retrieve the authorization file or use the instructions on the page to convert the base64 encoded string to an authorization file. This site will generate an authorization file for the version and license key you enter on the page. In order to get an authorization file for a previous version use the Cobalt Strike Auth File Generator site. ![]() How do I use an older version of Cobalt Strike with a refreshed authorization file? The authorization file is generated by the update process. The most important files are cobaltstrike.jar and th.īeyond the update process, Cobalt Strike does not "phone home" to Fortra. Copy the contents of the updated cobaltstrike/ folder into your environment.Update the Cobalt Strike package from an internet connected system.To use Cobalt Strike in a closed environment: The update program always co-locates this file with cobaltstrike.jar. How do I bring an authorization file into a closed environment? Remember, the Client Information and Team Server Information may have different values (depending on which license key was used and when the authorization file was last refreshed).Ĭobalt Strike will also warn you when its authorization file is within 45 days of its valid to date. Look for the "valid to" value under the Other section. Go to Help -> System Information to find out when your authorization file expires. For previous versions use the Cobalt Strike Auth File Generator site to refresh the authorization file with the latest information. If you renew your Cobalt Strike license, run the built-in update program to refresh the authorization file for the current released version with the latest information. ![]() Your authorization file expires when your Cobalt Strike license expires. If the teamserver version is prior to the current released version then use the Cobalt Strike Auth File Generator site instead. If you need to extend the license for a running teamserver, you can install/update CobaltStrike in a different location and copy/replace the “th” file from the new install into the running instance.Running teamservers will have a 14 day grace period before the server is shutdown during the daily license check.Clients connected to a teamserver will display a license warning ribbon starting 45 days prior to license expiration.The teamserver license expiration is logged in the event log when the team server starts.Teamserver checks the license at startup and at 10 AM everyday.The teamserver will shut down if the authorization file is not replaced during that period. If the authorization file expires while Cobalt Strike is running, the teamserver keeps running for an additional 14 days grace period. Additionally, the licensed Cobalt Strike product checks authorization files daily. What happens when my license expires?Ĭobalt Strike will refuse to start when its authorization file expires. This allows the authorization file to stay current with the license dates in Fortra records. ![]() The update program downloads a new authorization file for the current released version, even if your Cobalt Strike version is up to date. The built-in update program requests an authorization file from Cobalt Strike's update server when it's run. Authorization files for 4.9 and later will only be valid for the specific version. Authorization files for 4.8 and earlier will continue to be backward compatible. An authorization file is an encrypted blob that provides information about your license to the Cobalt Strike product.Īuthorization files are now associated to a specific release. The licensed version of Cobalt Strike requires a valid authorization file to start.
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