Windows_VulnDriver_NSecKrnl_b3a0c704

rule Windows_VulnDriver_NSecKrnl_b3a0c704 {
    meta:
        author = "Elastic Security"
        id = "b3a0c704-0081-4c3d-86c3-ea6aa43678ed"
        fingerprint = "8bdd30663681d5aef08dc63791e1486a2ff7218df7d9a9e96fb2a65b012a00e7"
        creation_date = "2026-05-22"
        last_modified = "2026-07-20"
        description = "Subject: Shandong Anzai Information Technology CO.,Ltd., Version: <= 3.7.42.5591"
        threat_name = "Windows.VulnDriver.NSecKrnl"
        reference_sample = "bfcb8d9fdcf46bd55e9e1bb146d4358510493973620ebaace3dd2e618f251b55"
        severity = 50
        arch_context = "x86"
        scan_context = "file"
        license = "Elastic License v2"
        os = "windows"
    strings:
        $subject_name = { 06 03 55 04 03 [2] 53 68 61 6E 64 6F 6E 67 20 41 6E 7A 61 69 20 49 6E 66 6F 72 6D 61 74 69 6F 6E 20 54 65 63 68 6E 6F 6C 6F 67 79 20 43 4F 2E 2C 4C 74 64 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 4E 00 53 00 65 00 63 00 4B 00 72 00 6E 00 6C 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-\x02][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x00-\x06][\x00-\x00][\x03-\x03][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x07-\x07][\x00-\x00][\x03-\x03][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\x29][\x00-\x00]|[\x07-\x07][\x00-\x00][\x03-\x03][\x00-\x00]([\x00-\xff][\x00-\x00]|[\x00-\xff][\x01-\x14]|[\x00-\xd6][\x15-\x15])[\x2a-\x2a][\x00-\x00]|[\x07-\x07][\x00-\x00][\x03-\x03][\x00-\x00][\xd7-\xd7][\x15-\x15][\x2a-\x2a][\x00-\x00])/
        $str1 = "NSecKrnl64.pdb"
        $str2 = "NSecKrnl" 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
}