Elastic Defend high stable eql
Execution via Suspicious JavaScript Updates
Identifies the execution of a Windows script with a file name following a phishing naming convention commonly used by SocGolish. SocGholish is an initial access threat that leverages drive-by-downloads masquerading as software updates.
Detection Logic
process where event.action == "start" and
process.pe.original_file_name in ("cscript.exe", "wscript.exe") and
(
process.args :
(
/* Temp archive file */
"?:\\Users\\*\\AppData\\Local\\Temp\\7z*\\*.Update.*.js",
"?:\\Users\\*\\AppData\\Local\\Temp\\Rar$*\\*.Update.*.js",
"?:\\Users\\*\\AppData\\Local\\Temp\\Temp?_*\\*.Update.*.js",
"?:\\Users\\*\\AppData\\Local\\Temp\\BNZ.*",
/* extracted by victim user to a random folder */
"?:\\Users\\*\\chrome.update.*.js",
"?:\\Users\\*\\firefox.update.*.js",
"?:\\Users\\*\\Opera.update.*.js",
"?:\\Users\\*\\Firefox.js",
"?:\\Users\\*\\Chrome.js",
"?:\\Users\\*\\Edge.js",
"?:\\Users\\*\\Opera.js"
) or
/* execution from mounted ISO or IMG */
(process.args regex~ """[D-Z]:\\[a-z0-9]+\.Update\.[a-z0-9]+\.js""" and process.working_directory : "?:\\" )
) Field Validations
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