Windows_VulnDriver_GDrv_877e895e

rule Windows_VulnDriver_GDrv_877e895e {
    meta:
        author = "Elastic Security"
        id = "877e895e-3132-45a3-b1c8-ffe0b07bad97"
        fingerprint = "3f7368b34e5ed264bd180cdd29eba2dd3590d22f4b92c03e36a6fe8f985809c5"
        creation_date = "2026-07-26"
        last_modified = "2026-08-11"
        description = "Name: gdrv3.sys, Version: <= 1.1.0.4"
        threat_name = "Windows.VulnDriver.GDrv"
        reference_sample = "2fa641388cf76e6392ff91160f8d8eca64b5bb7f7cd0a852448fd8b3055cc57b"
        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 67 00 64 00 72 00 76 00 33 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-\x03][\x00-\x00][\x00-\x00][\x00-\x00]|[\x01-\x01][\x00-\x00][\x01-\x01][\x00-\x00][\x04-\x04][\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 $original_file_name and $version and $str1 and $str2 and $str3
}