Windows_VulnDriver_WinIo_fa787472

rule Windows_VulnDriver_WinIo_fa787472 {
    meta:
        author = "Elastic Security"
        id = "fa787472-7597-400e-a8f3-39d38dea62c7"
        fingerprint = "cccb26abc4a03928a6d7fbc50cb9a78c1c191c1bc5f610449b0f122598587241"
        creation_date = "2026-05-22"
        last_modified = "2026-07-29"
        description = "Subject: Gordion AB, Version: <= 1.1.1.0"
        threat_name = "Windows.VulnDriver.WinIo"
        reference_sample = "0bfcf39a3e63bb6ef8afec67965103df1b9803bca31d221a7fd4233972be9e05"
        severity = 50
        arch_context = "x86"
        scan_context = "file"
        license = "Elastic License v2"
        os = "windows"
    strings:
        $subject_name = { 06 03 55 04 03 [2] 47 6F 72 64 69 6F 6E 20 41 42 }
        $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 77 00 69 00 6E 00 69 00 6F 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-\x00][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x00-\x00][\x00-\x00][\x01-\x01][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x01-\x01][\x00-\x00][\x01-\x01][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\x00][\x00-\x00]|[\x01-\x01][\x00-\x00][\x01-\x01][\x00-\x00][\x00-\x00][\x00-\x00][\x01-\x01][\x00-\x00])/
        $str1 = "winio.pdb"
    condition:
        int16(uint32(0x3C) + 0x5c) == 0x0001 and $subject_name and $original_file_name and $version and $str1
}