Elastic low stable kql

Potential Network Sweep Detected

This rule identifies a potential network sweep. A network sweep is a method used by attackers to scan a target network, identifying active hosts, open ports, and available services to gather information on vulnerabilities and weaknesses. This reconnaissance helps them plan subsequent attacks and exploit potential entry points for unauthorized access, data theft, or other malicious activities. This rule defines a threshold-based approach to detect multiple connection attempts from a single host to numerous destination hosts over commonly used network services.

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Detection Logic

event.action:(network_flow or flow_started) and destination.port:(21 or 22 or 23 or 25 or 139 or 445 or 3389 or 5985 or 5986) and
source.ip:(10.0.0.0/8 or 172.16.0.0/12 or 192.168.0.0/16)

Field Validations

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