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DETECTION OVERVIEW

New Outbound NFS Connection

Risk Factors

NFS network traffic does not typically traverse the network perimeter. Any NFS traffic that crosses the network perimeter without authorization should be investigated for signs of malicious activity.

Legitimate external NFS traffic associated with cloud-based instances, port forwarding, or packet filtering at the network perimeter might often look like traffic to unauthorized file servers. Configure Network Localities in the ExtraHop system to classify legitimate external NFS traffic as internal.

The system might change the risk score for this detection.

Kill Chain

Caution

Risk Score

78

Detection diagram
Next in Caution: New Outbound SMB Connection

Attack Background

N/A

Mitigation Options

Quarantine the device while checking for indicators of compromise
Block suspicious inbound and outbound traffic at the network perimeter

MITRE ATT&CK ID

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