Windows_VulnDriver_Cpuz_aa1951e3

rule Windows_VulnDriver_Cpuz_aa1951e3 {
    meta:
        author = "Elastic Security"
        id = "aa1951e3-373b-4022-8bbf-5b8cc3013960"
        fingerprint = "d645798da86f138dfe38dfd8bdb75867b255e2677ec93cede6bddea5f92e29d4"
        creation_date = "2026-05-22"
        last_modified = "2026-07-13"
        description = "Name: cpuz.sys, Version: <= 1.0.3.5"
        threat_name = "Windows.VulnDriver.Cpuz"
        reference_sample = "4ba987cf131e118b5c1b2b9ff333c685086696591d039f2f1ba2e75de35cfd0a"
        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 63 00 70 00 75 00 7A 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-\x02][\x00-\x00]|[\x00-\x00][\x00-\x00][\x01-\x01][\x00-\x00][\x00-\x04][\x00-\x00][\x03-\x03][\x00-\x00]|[\x00-\x00][\x00-\x00][\x01-\x01][\x00-\x00][\x05-\x05][\x00-\x00][\x03-\x03][\x00-\x00])/
        $str1 = "cpuz135_x64.pdb"
        $str2 = "CPUID service" wide
        $str3 = "CPUID Driver" wide
    condition:
        int16(uint32(0x3C) + 0x5c) == 0x0001 and int16(uint32(0x3C) + 0x18) == 0x020b and $original_file_name and $version and $str1 and $str2 and $str3
}