Persistence (TA0003)(external, opens in a new tab or window)
endpoint(external, opens in a new tab or window)
m365_defender(external, opens in a new tab or window)
sentinel_one_cloud_funnel(external, opens in a new tab or window)
text code block:file where host.os.type == "windows" and event.type : "creation" and ( /* Firefox-Based Browsers */ ( file.name : "*.xpi" and file.path : "?:\\Users\\*\\AppData\\Roaming\\*\\Profiles\\*\\Extensions\\*.xpi" and not ( process.name : "firefox.exe" and file.name : ( "langpack-*@firefox.mozilla.org.xpi", "*@dictionaries.addons.mozilla.org.xpi", "newtab@mozilla.org.xpi", "uBlock0@raymondhill.net.xpi", /* AdBlockPlus */ "{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}.xpi", /* Bitwarden */ "{446900e4-71c2-419f-a6a7-df9c091e268b}.xpi", "addon@darkreader.org.xpi", /* 1Password */ "{d634138d-c276-4fc8-924b-40a0ea21d284}.xpi", "support@lastpass.com.xpi", /* Grammarly */ "87677a2c52b84ad3a151a4a72f5bd3c4@jetpack.xpi", "sentinelone_visibility@sentinelone.com.xpi", "keepassxc-browser@keepassxc.org.xpi" ) ) ) or /* Chromium-Based Browsers */ ( file.name : "*.crx" and file.path : "?:\\Users\\*\\AppData\\Local\\*\\*\\User Data\\Webstore Downloads\\*" ) )
Install detection rules in Elastic Security
Detect Browser Extension Install in the Elastic Security detection engine by installing this rule into your Elastic Stack.
To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).