Adversaries may look for details about the network configuration and settings, such as IP and/or MAC addresses, of systems they access or through information discovery of remote systems. Several operating system administration utilities exist that can be used to gather this information. Examples include [Arp](https://attack.mitre.org/software/S0099), [ipconfig](https://attack.mitre.org/software/S0100)/[ifconfig](https://attack.mitre.org/software/S0101), [nbtstat](https://attack.mitre.org/software/S0102), and [route](https://attack.mitre.org/software/S0103).

Adversaries may also leverage a [Network Device CLI](https://attack.mitre.org/techniques/T1059/008) on network devices to gather information about configurations and settings, such as IP addresses of configured interfaces and static/dynamic routes (e.g. <code>show ip route</code>, <code>show ip interface</code>).(Citation: US-CERT-TA18-106A)(Citation: Mandiant APT41 Global Intrusion )

Adversaries may use the information from [System Network Configuration Discovery](https://attack.mitre.org/techniques/T1016) during automated discovery to shape follow-on behaviors, including determining certain access within the target network and what actions to do next. 
System Network Configuration Discovery
source_name: mitre-attack  url: https://attack.mitre.org/techniques/T1016  external_id: T1016     source_name: Mandiant APT41 Global Intrusion   description: Gyler, C.,Perez D.,Jones, S.,Miller, S.. (2021, February 25). This is Not a Test: APT41 Initiates Global Intrusion Campaign Using Multiple Exploits. Retrieved February 17, 2022.  url: https://www.mandiant.com/resources/apt41-initiates-global-intrusion-campaign-using-multiple-exploits     source_name: US-CERT-TA18-106A  description: US-CERT. (2018, April 20). Alert (TA18-106A) Russian State-Sponsored Cyber Actors Targeting Network Infrastructure Devices. Retrieved October 19, 2020.  url: https://www.us-cert.gov/ncas/alerts/TA18-106A     