Analysis of NTIOLib.sys: suspicious verdict, risk score 58/100. 5 YARA matches, 0/75 multi-engine detections. SHA256 3ed15a390d8dfbd8. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver NTIOLib.sys and assigned a verdict of Suspicious with a composite risk score of 58/100, indicating some risk signals warranting review (30-59 band).
| Verdict | Suspicious (58/100) |
| YARA matches | 5 |
| Multi-engine detections | 0 / 75 |
| File size | 15288 bytes |
| Code-signing signer | GlobalSign Root CA |
| Analyzed | 2026-09-06 |
| SHA256 | 3ed15a390d8dfbd8a8fb99e8367e19bfd1cced0e629dfe43ccdb46c863394b59 |
| SHA1 | 38571f14fc014487194d1eecfa80561ee8644e09 |
| MD5 | ca7fb53515f021f1d1af58706e653697 |
Version resource data embedded in the NTIOLib.sys PE header, as extracted by the analysis engine.
| File description | NTIOLib |
|---|---|
| Product | NTIOLib |
| Company | MSI |
| Original filename | NTIOLib.sys |
| Internal name | NTIOLib.sys |
| File version | 1.0.0.0 |
| Copyright | Copyright (C) 2008-2009 MSI. All rights reserved. |
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 | 95 / 100 |
| Dangerous kernel imports | 100 / 100 |
| IOCTL dispatch surface | 9 / 100 |
| Known-vulnerable corpus | 0 / 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 NTIOLib.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 |
| WRITE_PORT_ULONG | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| READ_PORT_ULONG | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| WRITE_PORT_UCHAR | 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 |
| READ_PORT_UCHAR | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| MmUnmapIoSpace | medium | Moderate risk - system modification capability |
| KeBugCheckEx | medium | Moderate risk - system modification capability |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| IoDeleteSymbolicLink | low | Standard kernel API - generally benign |
| IoCreateDevice | 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 |
|---|---|---|---|
| 0xC35060D0 | medium | METHOD_BUFFERED | CUSTOM_MSI Function #2100 |
| 0xC350A0D8 | medium | METHOD_BUFFERED | CUSTOM_MSI Function #2102 |
| 0x00340310 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #196 |
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 | 0x0ADE | 0x0C00 | 5.82 | CODE, EXEC, READ |
| .rdata | 0x01C4 | 0x0200 | 3.79 | IDATA, READ |
| .data | 0x000C | 0x0200 | 0.16 | IDATA, READ, WRITE |
| INIT | 0x032A | 0x0400 | 4.55 | CODE, EXEC, READ, WRITE, DISCARD |
| .rsrc | 0x0370 | 0x0400 | 2.89 | IDATA, READ, DISCARD |
| .reloc | 0x00EA | 0x0200 | 2.36 | 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_Msi_Ntiolibsys_Ntiolib_1014 | medium | Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - NTIOLib.sys. Investigate matches in context: expected filenames or standard ... |
| PUA_VULN_Driver_Msi_Ntiolibsys_Ntiolib_99F4 | medium | Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - NTIOLib.sys |
| BYOVD_MemRW | critical | Phys memory mapping + device creation |
| SUSP_PhysMem | high | Physical memory mapping |
| SUSP_PortIO | medium | Direct port I/O |
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 |
| T1542.001 | Pre-OS Boot: System Firmware | Persistence |
| T1543.003 | Windows Service | Persistence |
| T1569.002 | Service Execution | Execution |
| T1601 | Modify System Image | Defense Evasion |
| T1652 | Device Driver Discovery | Discovery |
| Signer | GlobalSign Root CA |
|---|---|
| Signer organisation | GlobalSign nv-sa |
| Issuer | Root SGC Authority |
| Serial | -3B44273F3500A95AEE2CA9699E66DDD0 |
| Valid from | 1999-08-20 00:30 UTC |
| Valid until | 2014-01-28 07:00 UTC (expired) |
| Signature validity | Not verified |
Engine angr, status completed, 4 paths explored at a maximum depth of 4. Vulnerability classes reached: 0. Exploitable paths: 0.
Based on DriverShield static and dynamic analysis, NTIOLib.sys shows some suspicious signals and warrants manual review. Its composite risk score is 58/100 (verdict: suspicious). Always validate findings independently before acting.
NTIOLib.sys has a DriverShield composite risk score of 58/100, placing it in the suspicious verdict band. SHA256: 3ed15a390d8dfbd8a8fb99e8367e19bfd1cced0e629dfe43ccdb46c863394b59.
NTIOLib.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators. It is code-signed by GlobalSign Root CA.
Related: Other drivers signed by GlobalSign Root CA · What an IOCTL dispatch code is · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas