event.category:process and host.os.type:windows and
(
powershell.file.script_block_text : (
"Microsoft.Office.Interop.Outlook" or
"Interop.Outlook.olDefaultFolders" or
"::olFolderInBox"
) or
powershell.file.script_block_text : (
"Microsoft.Exchange.WebServices.Data.Folder" or
"Microsoft.Exchange.WebServices.Data.FileAttachment"
)
) and not user.id : "S-1-5-18"
Install detection rules in Elastic Security
Detect PowerShell Mailbox Collection Script in the Elastic Security detection engine by installing this rule into your Elastic Stack.
To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).