Suspicious PowerShell Mailbox Export to Share
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About the rule
Rule Type
Standard
Rule Description
Detects usage of the powerShell New-MailboxExportRequest Cmdlet to exports a mailbox to a remote or local share, as used in ProxyShell exploitations
Severity
Critical
Rule Requirement
Criteria
Action1: actionname = "Process started" AND COMMANDLINE contains "New-MailboxExportRequest" AND COMMANDLINE contains " -Mailbox " AND COMMANDLINE contains " -FilePath \" select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Florian Roth (Nextron Systems)
