Windows_VulnDriver_Biostar_afac269b

rule Windows_VulnDriver_Biostar_afac269b {
    meta:
        author = "Elastic Security"
        id = "afac269b-83dc-4132-a2aa-f4323867df2a"
        fingerprint = "db6bcc2e86a70150e775e5a0d685eb213600a1eae07dfcffa8d82a4b939e9495"
        creation_date = "2026-05-22"
        last_modified = "2026-06-25"
        description = "Subject: Microsoft Windows Hardware Compatibility Publisher, Version: <= 10.0.1806.2200"
        threat_name = "Windows.VulnDriver.Biostar"
        reference_sample = "7c6f16af074c3f1c74fc69734f1c8b8a03b0594ac2085d5a0c582fc8cc378858"
        severity = 50
        arch_context = "x86"
        scan_context = "file"
        license = "Elastic License v2"
        os = "windows"
    strings:
        $subject_name = { 06 03 55 04 03 [2] 4D 69 63 72 6F 73 6F 66 74 20 57 69 6E 64 6F 77 73 20 48 61 72 64 77 61 72 65 20 43 6F 6D 70 61 74 69 62 69 6C 69 74 79 20 50 75 62 6C 69 73 68 65 72 }
        $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 42 00 53 00 5F 00 52 00 43 00 49 00 4F 00 36 00 34 00 5F 00 57 00 31 00 30 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-\x09][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x00-\x00][\x00-\x00][\x0a-\x0a][\x00-\x00][\x00-\xff][\x00-\xff]([\x00-\xff][\x00-\x00]|[\x00-\xff][\x01-\x06]|[\x00-\x0d][\x07-\x07])|[\x00-\x00][\x00-\x00][\x0a-\x0a][\x00-\x00]([\x00-\xff][\x00-\x00]|[\x00-\xff][\x01-\x07]|[\x00-\x97][\x08-\x08])[\x0e-\x0e][\x07-\x07]|[\x00-\x00][\x00-\x00][\x0a-\x0a][\x00-\x00][\x98-\x98][\x08-\x08][\x0e-\x0e][\x07-\x07])/
        $str1 = "BS_RCIO64_W10.pdb"
        $str2 = "BIOSTAR I/O driver" wide
        $str3 = "I/O Interface driver file" wide
    condition:
        int16(uint32(0x3C) + 0x5c) == 0x0001 and int16(uint32(0x3C) + 0x18) == 0x020b and $subject_name and $original_file_name and $version and $str1 and $str2 and $str3
}