Adversaries may attempt to get a listing of other systems by IP address, hostname, or other logical identifier on a network that may be used for Lateral Movement from the current system. Functionality could exist within remote access tools to enable this, but utilities available on the operating system could also be used such as  [Ping](https://attack.mitre.org/software/S0097) or <code>net view</code> using [Net](https://attack.mitre.org/software/S0039).

Adversaries may also analyze data from local host files (ex: <code>C:\Windows\System32\Drivers\etc\hosts</code> or <code>/etc/hosts</code>) or other passive means (such as local [Arp](https://attack.mitre.org/software/S0099) cache entries) in order to discover the presence of remote systems in an environment.

Adversaries may also target discovery of network infrastructure as well as leverage [Network Device CLI](https://attack.mitre.org/techniques/T1059/008) commands on network devices to gather detailed information about systems within a network (e.g. <code>show cdp neighbors</code>, <code>show arp</code>).(Citation: US-CERT-TA18-106A)(Citation: CISA AR21-126A FIVEHANDS May 2021)  

Remote System Discovery
source_name: mitre-attack  url: https://attack.mitre.org/techniques/T1018  external_id: T1018     source_name: CISA AR21-126A FIVEHANDS May 2021  description: CISA. (2021, May 6). Analysis Report (AR21-126A) FiveHands Ransomware. Retrieved June 7, 2021.  url: https://us-cert.cisa.gov/ncas/analysis-reports/ar21-126a     source_name: Elastic - Koadiac Detection with EQL  description: Stepanic, D.. (2020, January 13). Embracing offensive tooling: Building detections against Koadic using EQL. Retrieved November 30, 2020.  url: https://www.elastic.co/blog/embracing-offensive-tooling-building-detections-against-koadic-using-eql     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     