Analysis of cpuz-1.0.4.1.sys: vulnerable verdict, risk score 72/100. 3 YARA matches, 2/75 multi-engine detections. SHA256 ded2927f9a4e64ee. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver cpuz-1.0.4.1.sys and assigned a verdict of Vulnerable with a composite risk score of 72/100, indicating a known or likely vulnerability surface (60-79 band).
| Verdict | Vulnerable (72/100) |
| YARA matches | 3 |
| Multi-engine detections | 2 / 75 |
| File size | 46400 bytes |
| Code-signing signer | VeriSign Class 3 Public Primary Certification Authority - G5 |
| Analyzed | 2026-09-06 |
| SHA256 | ded2927f9a4e64eefd09d0caba78e94f309e3a6292841ae81d5528cab109f95d |
| SHA1 | f5696fb352a3fbd14fb1a89ad21a71776027f9ab |
| MD5 | db72def618cbc3c5f9aa82f091b54250 |
Version resource data embedded in the cpuz-1.0.4.1.sys PE header, as extracted by the analysis engine.
| File description | CPUID Driver |
|---|---|
| Product | CPUID service |
| Company | CPUID |
| Original filename | cpuz.sys |
| Internal name | cpuz.sys |
| File version | 6.1.7600.16385 built by: WinDDK |
| Copyright | Copyright(C) 2016 CPUID |
Each component is scored 0-100 and then weighted into the composite. See the analysis methodology for the exact formula.
| Component | Sub-score |
|---|---|
| Multi-engine consensus | 0 / 100 |
| YARA signature matches | 85 / 100 |
| Dangerous kernel imports | 100 / 100 |
| IOCTL dispatch surface | 27 / 100 |
| Known-vulnerable corpus | 100 / 100 |
| Code-signing state | 80 / 100 |
| Packing and entropy | 0 / 100 |
| Dynamic behaviour | 0 / 100 |
| CVE cross-reference | 0 / 100 |
Kernel-mode APIs resolved from the Import Address Table of cpuz-1.0.4.1.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapIoSpace | critical | Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination |
| HalGetBusDataByOffset | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| HalSetBusDataByOffset | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| KeBugCheckEx | medium | Moderate risk - system modification capability |
| IoGetDeviceObjectPointer | medium | Moderate risk - system modification capability |
| MmUnmapIoSpace | medium | Moderate risk - system modification capability |
| IoDeleteSymbolicLink | low | Standard kernel API - generally benign |
| IoBuildDeviceIoControlRequest | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| KeWaitForSingleObject | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| KeInitializeEvent | low | Standard kernel API - generally benign |
| RtlInitAnsiString | low | Standard kernel API - generally benign |
| IoCreateDevice | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
Control codes reachable through the driver dispatch routine. Codes tied to published exploit code are flagged, since they are the primary Bring Your Own Vulnerable Driver (BYOVD) entry points.
| Code | Severity | Transfer | Description |
|---|---|---|---|
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x0080EC81 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #2848 |
| 0x0080249C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2343 |
| 0x9C402500 | medium | METHOD_BUFFERED | CUSTOM_LENOVO Function #2368 |
| 0x0080B389 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3298 |
| 0x0080BB89 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3810 |
| 0x00340031 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #12 |
| 0x003402F0 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #188 |
| 0x008002A2 | medium | METHOD_OUT_DIRECT | FILE_DEVICE_CUSTOM Function #168 |
Section layout and Shannon entropy. High entropy in a code section is a packing or encryption indicator.
| Section | Virtual size | Raw size | Entropy | Flags |
|---|---|---|---|---|
| .text | 0x3A06 | 0x3C00 | 6.1 | CODE, EXEC, READ |
| .rdata | 0x048C | 0x0600 | 3.39 | IDATA, READ |
| .data | 0x0440 | 0x0200 | 0.38 | IDATA, READ, WRITE |
| .pdata | 0x00F0 | 0x0200 | 1.95 | IDATA, READ |
| INIT | 0x040E | 0x0600 | 3.88 | CODE, EXEC, READ, WRITE, DISCARD |
| .rsrc | 0x0350 | 0x0400 | 2.92 | IDATA, READ, DISCARD |
| Control Flow Guard | Not enabled |
|---|---|
| ASLR | Not enabled |
| DEP | Not enabled |
| Integrity check | Not enforced |
| Mitigation score | 5 / 100 |
| Rule | Severity | Detects |
|---|---|---|
| PUA_VULN_Driver_Cpuid_Cpuzsys_Cpuidservice_0E85 | medium | Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - cpuz.sys. Investigate matches in context: expected filenames or standard ven... |
| BYOVD_MemRW | critical | Phys memory mapping + device creation |
| SUSP_PhysMem | high | Physical memory mapping |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1003 | OS Credential Dumping | Credential Access |
| T1003.001 | OS Credential Dumping: LSASS Memory | Credential Access |
| T1006 | Direct Volume Access | Defense Evasion |
| T1014 | Rootkit | Defense Evasion |
| T1055.012 | Process Hollowing | Defense Evasion |
| T1068 | Exploitation for Privilege Escalation | Privilege Escalation |
| T1071 | Application Layer Protocol | Command and Control |
| T1211 | Exploitation for Defense Evasion | Defense Evasion |
| T1542.001 | Pre-OS Boot: System Firmware | Persistence |
| T1543.003 | Windows Service | Persistence |
| T1553.002 | Subvert Trust Controls: Code Signing | Defense Evasion |
| T1562.001 | Impair Defenses | Defense Evasion |
| T1569.002 | Service Execution | Execution |
| T1601 | Modify System Image | Defense Evasion |
| T1652 | Device Driver Discovery | Discovery |
| Signer | VeriSign Class 3 Public Primary Certification Authority - G5 |
|---|---|
| Signer organisation | VeriSign, Inc. |
| Serial | 250CE8E030612E9F2B89F7054D7CF8FD |
| Valid from | 2006-11-08 00:00 UTC |
| Valid until | 2021-11-07 23:59 UTC (expired) |
| Signature validity | Not verified |
Engine angr, status completed, 55 paths explored at a maximum depth of 55. Vulnerability classes reached: 1. Exploitable paths: 0.
Corpus match: this hash is present in the known-vulnerable driver corpus DriverShield cross-references during analysis, which is why the score carries a full weighting on that component.
Based on DriverShield static and dynamic analysis, cpuz-1.0.4.1.sys is flagged as vulnerable and is a potential Bring Your Own Vulnerable Driver (BYOVD) risk. Its composite risk score is 72/100 (verdict: vulnerable). Always validate findings independently before acting.
cpuz-1.0.4.1.sys has a DriverShield composite risk score of 72/100, placing it in the vulnerable verdict band. SHA256: ded2927f9a4e64eefd09d0caba78e94f309e3a6292841ae81d5528cab109f95d.
cpuz-1.0.4.1.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators. It is code-signed by VeriSign Class 3 Public Primary Certification Authority - G5.
Related: Other drivers signed by VeriSign Class 3 Public Primary Certification Authority - G5 · What an IOCTL dispatch code is · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas