Techniques › T1592 › T1592.004
T1592.004 Client Configurations
reconnaissance — PRE · attack.mitre.org · JSON
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MITRE detection strategy
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analytics
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Sigma rules tagged attack.t1592.004
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KEV CVEs mapped here
<p>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.</p><p>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. 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).</p>
KEV CVEs mapped to this technique · CTID Mappings Explorer
None. No KEV entry in the public mapping names this technique. Given that 74.7% of KEV has no mapping at all, this says more about the mapping than about the technique.
Detection strategy · ATT&CK Enterprise v19.2
- DET0820 Detection of Client Configurations v1.0
AN1952 PREInternet scanners may be used to look for patterns associated with malicious content designed to collect client configuration information from visitors. Much of this activity may have a very high occurrence and associated false positive rate, as well as potentially taking place outside the visibility of the target organization, making detection difficult for defenders. Detection efforts may be focused on related stages of the adversary lifecycle, such as during Initial Access.
Sigma rules · SigmaHQ da9bb07d64, tag attack.t1592.004
Author: Florian Roth (Nextron Systems)
· 2022-06-20 · logsource: product=linux category=process_creation · 0cf7a157-8879-41a2-8f55-388dd23746b7
Detects events with patterns found in commands used for reconnaissance on linux systems
Author: Florian Roth (Nextron Systems)
· 2022-06-20 (modified 2025-06-04) · logsource: product=linux category=process_creation · 0f79c4d2-4e1f-4683-9c36-b5469a665e06
Detects the execution of a text-based file access or inspection utilities to read the content of /etc/sudoers in order to potentially list all users that have sudo rights.
Author: Florian Roth (Nextron Systems)
· 2022-06-20 (modified 2022-09-15) · logsource: product=linux category=process_creation · d7821ff1-4527-4e33-9f84-d0d57fa2fb66
Detects events in which someone prints the contents of history files to the commandline or redirects it to a file for reconnaissance