Windows_Rootkit_MicrosoftRootCertificate_17534d99

rule Windows_Rootkit_MicrosoftRootCertificate_17534d99 {
    meta:
        author = "Elastic Security"
        id = "17534d99-4c27-4a5b-b7d1-591c2a76acc9"
        fingerprint = "4384f5560102b8b1f1a0fdb6e9d44f92f33279fae587a73e50dbc8e49d06c9b5"
        creation_date = "2026-05-22"
        last_modified = "2026-08-10"
        description = "Subject: Microsoft Windows Hardware Compatibility Publisher"
        threat_name = "Windows.Rootkit.MicrosoftRootCertificate"
        reference_sample = "1afa03118f87b62c59a97617e595ebb26dde8dbdd16ee47ef3ddd1097c30ef6a"
        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 }
        $str1 = "AsIO.pdb"
    condition:
        int16(uint32(0x3C) + 0x5c) == 0x0001 and $subject_name and $str1
}