T1176.001

Browser Extensions

SUB-TECHNIQUE Persistence

Description

Adversaries may abuse internet browser extensions to establish persistent access to victim systems. Browser extensions or plugins are small programs that can add functionality to and customize aspects of internet browsers. They can be installed directly via a local file or custom URL or through a browser's app store - an official online platform where users can browse, install, and manage extensions for a specific web browser. Extensions generally inherit the web browser's permissions previously granted.(Citation: Wikipedia Browser Extension)(Citation: Chrome Extensions Definition) Malicious extensions can be installed into a browser through malicious app store downloads masquerading as legitimate extensions, through social engineering, or by an adversary that has already compromised a system. Security can be limited on browser app stores, so it may not be difficult for malicious extensions to defeat automated scanners.(Citation: Malicious Chrome Extension Numbers) Depending on the browser, adversaries may also manipulate an extension's update url to install updates from an adversary-controlled server or manipulate the mobile configuration file to silently install additional extensions.Adversaries may abuse how chromium-based browsers load extensions by modifying or replacing the Preferences and/or Secure Preferences files to silently install malicious extensions. When the browser is not running, adversaries can alter these files, ensuring the extension is loaded, grant…

Platforms

LinuxWindowsmacOS

Mitigations

M1033 — Limit Software Installation
M1047 — Audit
M1051 — Update Software
M1017 — User Training
M1038 — Execution Prevention

Look up any technique

Use our free MITRE ATT&CK lookup tool, or browse the full ATT&CK matrix.

Our coverage

Source: MITRE ATT&CK Enterprise matrix. View on attack.mitre.org →