Windows_VulnDriver_ALSysIO_81b4a3a7

rule Windows_VulnDriver_ALSysIO_81b4a3a7 {
    meta:
        author = "Elastic Security"
        id = "81b4a3a7-45ea-49e6-8acc-f03f16254671"
        fingerprint = "6cb650d2f41b0f2d7c780b64ea2b2aad9fb0dfcb8b199a9aee4bde9b60cae121"
        creation_date = "2026-04-02"
        last_modified = "2026-06-25"
        description = "Subject: CPUID, Version: <= 2.0.7.0"
        threat_name = "Windows.VulnDriver.ALSysIO"
        reference_sample = "9ebf801ffee68cb4f5972207de8a19b076054dddd328051c2a25fcc3a7f926de"
        severity = 50
        arch_context = "x86"
        scan_context = "file"
        license = "Elastic License v2"
        os = "windows"
    strings:
        $subject_name = { 06 03 55 04 03 [2] 43 50 55 49 44 }
        $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 41 00 4C 00 53 00 79 00 73 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-\x01][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x00-\x00][\x00-\x00][\x02-\x02][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\x06][\x00-\x00]|[\x00-\x00][\x00-\x00][\x02-\x02][\x00-\x00][\x00-\x00][\x00-\x00][\x07-\x07][\x00-\x00])/
        $str1 = "ALSysIO64.pdb"
    condition:
        int16(uint32(0x3C) + 0x5c) == 0x0001 and int16(uint32(0x3C) + 0x18) == 0x020b and $subject_name and $original_file_name and $version and $str1
}