Port Scan

# Description

Adversaries may perform a port scan on a system, device, or network to identify live hosts, enumerate open ports and running services, identify operating systems, and map out the network.(Citation: NIST SP 800-82r3) The results of a port scan may inform adversary [Discovery](https://attack.mitre.org/tactics/TA0102), [Lateral Movement](https://attack.mitre.org/tactics/TA0109), and vulnerability exploitation decisions ([Exploitation for Evasion](https://attack.mitre.org/techniques/T0820), [Exploitation for Privilege Escalation](https://attack.mitre.org/techniques/T0890), [Exploitation of Remote Services](https://attack.mitre.org/techniques/T0866)). Some common tools for executing a port scan include `nmap`, `netcat`, and the Advanced Port Scanner.