LoFP / legitimate powershell commands that use hidden windows for automation tasks may trigger this detection. the search specifically looks for patterns typical of fakecaptcha campaigns. you may need to add additional exclusions for legitimate administrative activities in your environment by modifying the filter macro.

| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime FROM datamodel=Endpoint.Processes
  WHERE `process_powershell`
    AND
    Processes.process="*-w*h*"
    AND
    ( (Processes.process IN ("*robot*", "*captcha*", "*verify*", "*security check*", "*complete verification*"))
    OR
    ( (Processes.process IN ("*iwr *", "*Invoke-WebRequest*", "*wget *", "*curl *", "*Net.WebClient*", "*DownloadString*", "*[Convert]::FromBase64String*"))
    AND
    (Processes.process IN ("*iex*", "*Invoke-Expression*"))
    AND
    (Processes.process IN ("*click*", "*verify*", "*check*", "*human*", "*bot*", "*token*", "*challenge*")) )
    OR
    ( Processes.process="*clipboard*"
    AND
    Processes.process="*iex*"
    AND
    (Processes.process="*FromBase64String*"
    OR
    Processes.process="*decode*") ) )
  BY Processes.action Processes.dest Processes.original_file_name
     Processes.parent_process Processes.parent_process_exec Processes.parent_process_guid
     Processes.parent_process_id Processes.parent_process_name Processes.parent_process_path
     Processes.process Processes.process_exec Processes.process_guid
     Processes.process_hash Processes.process_id Processes.process_integrity_level
     Processes.process_name Processes.process_path Processes.user
     Processes.user_id Processes.vendor_product

| `drop_dm_object_name(Processes)`

| `security_content_ctime(firstTime)`

| `security_content_ctime(lastTime)`

| `windows_powershell_fakecaptcha_clipboard_execution_filter`