Windows_VulnDriver_Elby_8838db2c

rule Windows_VulnDriver_Elby_8838db2c {
    meta:
        author = "Elastic Security"
        id = "8838db2c-dc45-43bd-9efa-bc25c2968696"
        fingerprint = "c947976b38173d7de55a98b45adf8f57490c6fa3521b5a52bc07f69393740517"
        creation_date = "2026-05-22"
        last_modified = "2026-07-13"
        description = "Name: ElbyCDIO.sys, Version: <= 4.2.0.0"
        threat_name = "Windows.VulnDriver.Elby"
        reference_sample = "af16c36480d806adca881e4073dcd41acb20c35ed0b1a8f9bd4331de655036e1"
        severity = 50
        arch_context = "x86"
        scan_context = "file"
        license = "Elastic License v2"
        os = "windows"
    strings:
        $original_file_name = { 4F 00 72 00 69 00 67 00 69 00 6E 00 61 00 6C 00 46 00 69 00 6C 00 65 00 6E 00 61 00 6D 00 65 00 00 00 45 00 6C 00 62 00 79 00 43 00 44 00 49 00 4F 00 2E 00 73 00 79 00 73 00 00 00 }
        $version = /V\x00S\x00_\x00V\x00E\x00R\x00S\x00I\x00O\x00N\x00_\x00I\x00N\x00F\x00O\x00\x00\x00{0,4}\xbd\x04\xef\xfe[\x00-\xff]{4}([\x00-\xff][\x00-\xff][\x00-\x03][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x00-\x01][\x00-\x00][\x04-\x04][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x02-\x02][\x00-\x00][\x04-\x04][\x00-\x00][\x00-\x00][\x00-\x00][\x00-\x00][\x00-\x00])/
        $str1 = "CDRTools" wide
        $str2 = "ElbyCD Windows NT/2000/XP I/O driver" wide
    condition:
        int16(uint32(0x3C) + 0x5c) == 0x0001 and $original_file_name and $version and $str1 and $str2
}