US 2022/0046042 A1 · Scanner probe detection

Abstract

A method, including identifying, in network data traffic, multiple scans, each of the scans including an access, in the traffic, of multiple ports on a given destination node by a given source node during a time period. A group of high-traffic ports are identified in the traffic that include one or more ports that receive respective volumes of the traffic that exceed a threshold, and respective signatures are generated for the identified port scans that indicate the ports other than the high-traffic ports that were accessed in each of the port scans. A respective frequency of occurrence of each of the signatures over the set of the port scans is computed, and a whitelist of the signatures for which the respective frequency of occurrence is greater than a threshold is assembled. Upon detecting a port scan for which the respective signature is not whitelisted, a preventive action is initiated.

Claims23

Dependent claims

A method, comprising:

identifying, in data traffic transmitted between multiple nodes that communicate over a network, a set of port scans, each of the port scans comprising an access, in the data traffic, of a plurality of communication ports on a given destination node by a given source node during a specified time period;
identifying in the data traffic a group of high-traffic ports, comprising one or more of the communication ports that receive respective volumes of the data traffic that are in excess of a predefined threshold;
and
upon detecting a port scan not comprising the access of any of the identified high-traffic ports, initiating a preventive action.

1 more element

An apparatus, comprising:

a network interface device coupled to a data network comprising multiple nodes that communicate via the network;
and
at least one processor configured:
to identify, in data traffic transmitted between multiple nodes that communicate over a network, a set of port scans, each of the port scans comprising an access, in the data traffic, of a plurality of communication ports on a given destination node by a given source node during a specified time period;
to identify in the data traffic a group of high-traffic ports, comprising one or more of the communication ports that receive respective volumes of the data traffic that are in excess of a predefined threshold;
and
upon detecting a port scan not comprising the access of any of the identified high-traffic ports, to initiate a preventive action.

4 more elements

Dependencies are inferred from the claim text.

Scanner probe detection

Life of this patent

Scanner probe detection

Life of this patent

Abstract

Claims23