Adversaries may compromise third-party servers that can be used during targeting. Use of servers allows an adversary to stage, launch, and execute an operation. During post-compromise activity, adversaries may utilize servers for various tasks, including for Command and Control.(Citation: TrendMicro EarthLusca 2022) Instead of purchasing a [Server](https://attack.mitre.org/techniques/T1583/004) or [Virtual Private Server](https://attack.mitre.org/techniques/T1583/003), adversaries may compromise third-party servers in support of operations.

Adversaries may also compromise web servers to support watering hole operations, as in [Drive-by Compromise](https://attack.mitre.org/techniques/T1189), or email servers to support [Phishing](https://attack.mitre.org/techniques/T1566) operations.
Server
source_name: mitre-attack  url: https://attack.mitre.org/techniques/T1584/004  external_id: T1584.004     source_name: TrendMicro EarthLusca 2022  description: Chen, J., et al. (2022). Delving Deep: An Analysis of Earth Lusca’s Operations. Retrieved July 1, 2022.  url: https://www.trendmicro.com/content/dam/trendmicro/global/en/research/22/a/earth-lusca-employs-sophisticated-infrastructure-varied-tools-and-techniques/technical-brief-delving-deep-an-analysis-of-earth-lusca-operations.pdf     source_name: Koczwara Beacon Hunting Sep 2021  description: Koczwara, M. (2021, September 7). Hunting Cobalt Strike C2 with Shodan. Retrieved October 12, 2021.  url: https://michaelkoczwara.medium.com/cobalt-strike-c2-hunting-with-shodan-c448d501a6e2     source_name: Mandiant SCANdalous Jul 2020  description: Stephens, A. (2020, July 13). SCANdalous! (External Detection Using Network Scan Data and Automation). Retrieved October 12, 2021.  url: https://www.mandiant.com/resources/scandalous-external-detection-using-network-scan-data-and-automation     source_name: ThreatConnect Infrastructure Dec 2020  description: ThreatConnect. (2020, December 15). Infrastructure Research and Hunting: Boiling the Domain Ocean. Retrieved October 12, 2021.  url: https://threatconnect.com/blog/infrastructure-research-hunting/     