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CONTAP-245206: Newly Observed File Extensions are seen in workload-behavior even after marking false-positive as true for extensions

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Issue

  • After ARW attack, clear-suspect is performed by marking the affected extensions as false positives:

::> security anti-ransomware volume attack clear-suspect -vserver SVM1 -volume vol1 -false-positive true -extensions testlog, pdf, tmp
  • However, even after that, the extensions are reported in the "Newly Observed File Extensions" section of the workload behaviour output:

::> security anti-ransomware volume workload-behavior show -vserver SVM1 -volume vol1
                                         Vserver: SVM1
                                          Volume: vol1
                        File Extensions Observed: CSV, xlsx, tmp, dll, pdf,
                                                  pptx, JPG, cache, cs,
                                                  VR, xd$, TP, vr, LS, xdw, tx,
                                                  DLL, xlsm, editorconfig, in,
                                                  ev, tp, zip, #dw, jpg, dwg,
                                                  VD, sv, JBI
              Number of File Extensions Observed: 465
 
Historical Statistics
              High Entropy Data Write Percentage: 98
   High Entropy Data Write Peak Rate (KB/Minute): 27192
              File Create Peak Rate (per Minute): 1567
              File Delete Peak Rate (per Minute): 1793
              File Rename Peak Rate (per Minute): 18
 
Surge Observed
                                  Surge Timeline: -
              High Entropy Data Write Percentage: -
   High Entropy Data Write Peak Rate (KB/Minute): -
              File Create Peak Rate (per Minute): -
              File Delete Peak Rate (per Minute): -
              File Rename Peak Rate (per Minute): -
                  Newly Observed File Extensions: {color:#172b4d}testlog, pdf, tmp{color}
        Number of Newly Observed File Extensions: 1, 5, 7
 

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