Windows_VulnDriver_ProcExp_e51390a6

rule Windows_VulnDriver_ProcExp_e51390a6 {
    meta:
        author = "Elastic Security"
        id = "e51390a6-61b8-4ba6-ba2e-e0ea719527e4"
        fingerprint = "daf123844d81e3e9ba69790dcc58d280e19b6212027350546cea29ca52dd860b"
        creation_date = "2026-05-22"
        last_modified = "2026-07-29"
        description = "Subject: Sysinternals, Version: <= 11.40.0.0"
        threat_name = "Windows.VulnDriver.ProcExp"
        reference_sample = "3ff39728f1c11d1108f65ec5eb3d722fd1a1279c530d79712e0d32b34880baaa"
        severity = 50
        arch_context = "x86"
        scan_context = "file"
        license = "Elastic License v2"
        os = "windows"
    strings:
        $subject_name = { 06 03 55 04 03 [2] 53 79 73 69 6E 74 65 72 6E 61 6C 73 }
        $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 70 00 72 00 6F 00 63 00 65 00 78 00 70 00 2E 00 53 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-\x0a][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x00-\x27][\x00-\x00][\x0b-\x0b][\x00-\x00][\x00-\xff][\x00-\xff][\x00-\xff][\x00-\xff]|[\x28-\x28][\x00-\x00][\x0b-\x0b][\x00-\x00][\x00-\x00][\x00-\x00][\x00-\x00][\x00-\x00])/
        $str1 = "procexp140.pdb"
        $str2 = "Process Explorer" wide
    condition:
        int16(uint32(0x3C) + 0x5c) == 0x0001 and $subject_name and $original_file_name and $version and $str1 and $str2
}