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Repeated false positive ransomware alerts on NAS volumes

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Category:
ontap-9
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core
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Applies to

  • ONTAP 9
  • Anti-Ransomware Protection (ARP)
  • NAS environment

Issue

  • ActiveIQ Unified Manager repeatedly generates 'Ransomware activities detected' alerts for volumes after marking them as false positives.
  • Anti-ransomware (ARW) alerts triggered by high encryption percentage on NFS datastore volumes (VMDK).
[node1:svc_queue_thread:callhome.arw.activity.seen:alert]: Callhome message for "POSSIBLE RANSOMWARE ACTIVITY DETECTED", Volume: "vol1" in Vserver: "vs1"

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