Execution via Suspicious JavaScript Updates

[rule]
description = """
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.
"""
id = "28d4818c-7da1-4173-bb7c-4b7bb8f0976f"
license = "Elastic License v2"
name = "Execution via Suspicious JavaScript Updates"
os_list = ["windows"]
reference = ["https://malpedia.caad.fkie.fraunhofer.de/details/js.fakeupdates"]
version = "1.0.27"

query = '''
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 : "?:\\" )
  )
'''

min_endpoint_version = "7.15.0"
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0

[[optional_actions]]
action = "rollback"
field = "process.entity_id"
state = 0

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1566"
name = "Phishing"
reference = "https://attack.mitre.org/techniques/T1566/"
[[threat.technique.subtechnique]]
id = "T1566.001"
name = "Spearphishing Attachment"
reference = "https://attack.mitre.org/techniques/T1566/001/"



[threat.tactic]
id = "TA0001"
name = "Initial Access"
reference = "https://attack.mitre.org/tactics/TA0001/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1059"
name = "Command and Scripting Interpreter"
reference = "https://attack.mitre.org/techniques/T1059/"
[[threat.technique.subtechnique]]
id = "T1059.007"
name = "JavaScript"
reference = "https://attack.mitre.org/techniques/T1059/007/"



[threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1036"
name = "Masquerading"
reference = "https://attack.mitre.org/techniques/T1036/"


[threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"

[internal]
min_endpoint_version = "7.15.0"