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T1592.004 Client Configurations

Adversaries may gather information about the victim’s client configurations that can be used during targeting. Information about client configurations may include a variety of details and settings, including operating system/version, virtualization, architecture (ex: 32 or 64 bit), language, and/or time zone.

Adversaries may gather this information in various ways, such as direct collection actions via Active Scanning (ex: listening ports, server banners, user agent strings) or Phishing for Information. Adversaries may also compromise sites then include malicious content designed to collect host information from visitors.1 Information about the client configurations may also be exposed to adversaries via online or other accessible data sets (ex: job postings, network maps, assessment reports, resumes, or purchase invoices). Gathering this information may reveal opportunities for other forms of reconnaissance (ex: Search Open Websites/Domains or Search Open Technical Databases), establishing operational resources (ex: Develop Capabilities or Obtain Capabilities), and/or initial access (ex: Supply Chain Compromise or External Remote Services).

Item Value
ID T1592.004
Sub-techniques T1592.001, T1592.002, T1592.003, T1592.004
Tactics TA0043
Platforms PRE
Version 1.1
Created 02 October 2020
Last Modified 17 October 2021

Procedure Examples

ID Name Description
G0125 HAFNIUM HAFNIUM has interacted with Office 365 tenants to gather details regarding target’s environments.3


ID Mitigation Description
M1056 Pre-compromise This technique cannot be easily mitigated with preventive controls since it is based on behaviors performed outside of the scope of enterprise defenses and controls. Efforts should focus on minimizing the amount and sensitivity of data available to external parties.


ID Data Source Data Component
DS0035 Internet Scan Response Content