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High Entropy data detection cannot trigger arw.analytics.high.entropy event

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Category:
ontap-9
Specialty:
core
Last Updated:

Applies to

ONTAP 9

Issue

High Entropy data detection cannot trigger arw.analytics.high.entropy event but only ARP snapshots are generated.
 
::> 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

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