Windows_VulnDriver_TmComm_8523c85e

rule Windows_VulnDriver_TmComm_8523c85e {
    meta:
        author = "Elastic Security"
        id = "8523c85e-c6e4-47f8-9e8c-55ca144f1881"
        fingerprint = "d928ca41d83552ee0ec6cdd85fc7722f035634950fc7db27be7c555184062ba5"
        creation_date = "2026-05-22"
        last_modified = "2026-07-29"
        description = "Subject: Trend Micro, Inc., Version: <= 2.5.0.1121"
        threat_name = "Windows.VulnDriver.TmComm"
        reference_sample = "a8027daa6facf1ff81405daf6763249e9acf232a1a191b6bf106711630e6188e"
        severity = 50
        arch_context = "x86"
        scan_context = "file"
        license = "Elastic License v2"
        os = "windows"
    strings:
        $subject_name = { 06 03 55 04 03 [2] 54 72 65 6E 64 20 4D 69 63 72 6F 2C 20 49 6E 63 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 54 00 6D 00 43 00 6F 00 6D 00 6D 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-\x01][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x00-\x04][\x00-\x00][\x02-\x02][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x05-\x05][\x00-\x00][\x02-\x02][\x00-\x00]([\x00-\xff][\x00-\x00]|[\x00-\xff][\x01-\x03]|[\x00-\x60][\x04-\x04])[\x00-\x00][\x00-\x00]|[\x05-\x05][\x00-\x00][\x02-\x02][\x00-\x00][\x61-\x61][\x04-\x04][\x00-\x00][\x00-\x00])/
        $str1 = "tmcomm.pdb"
        $str2 = "_UtilGetFileObjectForProcessByEPROC@8"
        $str3 = "_UtilbuildDynamicDiskMappingTable@0"
        $str4 = "TrendMicro Common Module" wide
    condition:
        int16(uint32(0x3C) + 0x5c) == 0x0001 and $subject_name and $original_file_name and $version and $str1 and $str2 and $str3 and $str4
}