通过 MSIEXEC 的可疑执行

process where host.os.type == "windows" and event.action == "start" and
  process.name : "msiexec.exe" and user.id : ("S-1-5-21*", "S-1-12-*") and process.parent.executable != null and
  (
    (process.args : "/i" and process.args : ("/q", "/quiet") and process.args_count == 4 and
     process.args : ("?:\\Users\\*", "?:\\ProgramData\\*") and
     not process.parent.executable : ("?:\\Program Files (x86)\\*.exe",
                                      "?:\\Program Files\\*.exe",
                                      "?:\\Windows\\explorer.exe",
                                      "?:\\Users\\*\\Desktop\\*",
                                      "?:\\Users\\*\\Downloads\\*",
                                      "?:\\programdata\\*")) or

    (process.args_count == 1 and not process.parent.executable : ("?:\\Windows\\explorer.exe", "?:\\Windows\\SysWOW64\\explorer.exe")) or

    (process.args : "/i" and process.args : ("/q", "/quiet") and process.args_count == 4 and
     (process.parent.args : "Schedule" or process.parent.name : "wmiprvse.exe" or
     process.parent.executable : "?:\\Users\\*\\AppData\\*" or
     (process.parent.name : ("powershell.exe", "cmd.exe") and length(process.parent.command_line) >= 200))) or

    (process.args : "/i" and process.args : ("/q", "/quiet") and process.args_count == 4 and
     ?process.working_directory : "?:\\" and process.parent.name : ("cmd.exe", "powershell.exe"))
  ) and

  /* noisy pattern */
  not (process.parent.executable : "?:\\Users\\*\\AppData\\Local\\Temp\\*" and ?process.parent.args_count >= 2 and
       process.args : "?:\\Users\\*\\AppData\\Local\\Temp\\*\\*.msi") and

  not process.args : ("?:\\Program Files (x86)\\*", "?:\\Program Files\\*")