高エントロピーデータ検出でARW.ANALYS.HIGHエントロピーイベントをトリガーできない

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Category:: ontap-9

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環境

ONTAP 9

問題

高エントロピーデータ検出は ARW.analytics.high.entropy イベントをトリガーできませんが、ARPスナップショットのみが生成されます。

::> security anti-ransomware volume workload-behavior show -vserver svm1 -volume vol1

Vserver : svm1

Volume : vol1

File Extensions Observed : crt, pdf, docx, key, rpm,

XML, 7z, zip, txt, docm, pem,

reg, exe, conf, gz, jks,

html, csr, p12, ppk, 2, msi,

dat

Number of File Extensions Observed : 23

Historical Statistics

High Entropy Data Write Percentage : -

High Entropy Data Write Peak Rate (KB/Minute) : -

File Create Peak Rate (per Minute) : 5

File Delete Peak Rate (per Minute) : -

File Rename Peak Rate (per Minute) : -

Surge Observed

Surge Timeline : 11/2/2023 07:29:35

High Entropy Data Write Percentage : 100

High Entropy Data Write Peak Rate (KB/Minute) : 5120

File Create Peak Rate (per Minute) : -

File Delete Peak Rate (per Minute) : -

File Rename Peak Rate (per Minute) : -

Newly Observed File Extensions : -

Number of Newly Observed File Extensions : -

::> event log show -message-name arw.analytics.high.entropy

There are no entries matching your query.

::> security anti-ransomware volume attack-detection-parameters show -vserver svm1 -volume vol3
                        Vserver Name : svm1
                     Volume Name : vol3
       Is Detection Based on High Entropy Data Rate? : true
   Is Detection Based on Never Seen before File Extension? : true
           Is Detection Based on File Create Rate? : true
           Is Detection Based on File Rename Rate? : true
           Is Detection Based on File Delete Rate? : true
       Is Detection Relaxing Popular File Extensions? : true
         High Entropy Data Surge Notify Percentage : 100
          File Create Rate Surge Notify Percentage : 100
          File Rename Rate Surge Notify Percentage : 100
          File Delete Rate Surge Notify Percentage : 100
  Never Seen before File Extensions Count Notify Threshold : 20
     Never Seen before File Extensions Duration in Hour : 24