Windows_VulnDriver_GDrv_a51f996c

rule Windows_VulnDriver_GDrv_a51f996c {
    meta:
        author = "Elastic Security"
        id = "a51f996c-b908-4de7-929e-a717260c22fe"
        fingerprint = "79301e3d23ce49f9b5b57fc41c608c4ae659e34439c1de3548f3238c3d415e8f"
        creation_date = "2026-05-22"
        last_modified = "2026-07-13"
        description = "Subject: GIGA-BYTE TECHNOLOGY CO., LTD., Version: <= 1.0.0.5"
        threat_name = "Windows.VulnDriver.GDrv"
        reference_sample = "26c28746e947389856543837aa59a5b1f4697e5721a04d00aa28151a2659b097"
        severity = 50
        arch_context = "x86"
        scan_context = "file"
        license = "Elastic License v2"
        os = "windows"
    strings:
        $subject_name = { 06 03 55 04 03 [2] 47 49 47 41 2D 42 59 54 45 20 54 45 43 48 4E 4F 4C 4F 47 59 20 43 4F 2E 2C 20 4C 54 44 2E }
        $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 67 00 64 00 72 00 76 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-\x04][\x00-\x00][\x00-\x00][\x00-\x00]|[\x00-\x00][\x00-\x00][\x01-\x01][\x00-\x00][\x05-\x05][\x00-\x00][\x00-\x00][\x00-\x00])/
        $str1 = "gdrv.pdb"
        $str2 = "GIGA-BYTE Software driver" wide
        $str3 = "GIGA-BYTE NonPnP Driver" 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
}