HostExportingMailboxAndRemovingExport[Solarigate]

This hunting query looks for hosts exporting a mailbox from an on-prem Exchange server, followed by that same host removing the export within a short time window. This pattern has been observed by attackers when exfiltrating emails from a target environment. A Mailbox export is unlikely to be a common command run so look for activity from unexpected hosts and accounts. Reference: https://www.volexity.com/blog/2020/12/14/dark-halo-leverages-solarwinds-compromise-to-breach-organizations/ Query insprired by Azure Sentinel detection https://github.com/Azure/Azure-Sentinel/blob/master/Hunting%20Queries/SecurityEvent/HostExportingMailboxAndRemovingExport.yaml