Analysis of ndisuio.sys: clean verdict, risk score 25/100. 0 YARA matches. SHA256 3d7685d3960382fb. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver ndisuio.sys and assigned a verdict of Clean with a composite risk score of 25/100, indicating no notable risk signals (0-29 band).
| Verdict | Clean (25/100) |
| YARA matches | 0 |
| File size | 70656 bytes |
| Analyzed | 2026-03-22 |
| SHA256 | 3d7685d3960382fb102e225634d54a2370da53deb89cae4765ad00c9afe030b7 |
| SHA1 | 2550dec180019e64a7cf26ebc1868f16c06394ee |
| MD5 | 09bd40437780ed584d06519373acedc7 |
Version resource data embedded in the ndisuio.sys PE header, as extracted by the analysis engine.
| File description | NDIS User mode I/O driver |
|---|---|
| Product | Microsoft® Windows® Operating System |
| Company | Microsoft Corporation |
| Original filename | NDISUIO.SYS |
| Internal name | NDISUIO.SYS |
| File version | 10.0.19041.1 (WinBuild.160101.0800) |
| Copyright | © Microsoft Corporation. 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 | 0 / 100 |
| Dangerous kernel imports | 100 / 100 |
| IOCTL dispatch surface | 36 / 100 |
| Known-vulnerable corpus | 0 / 100 |
| Code-signing state | 50 / 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 ndisuio.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapLockedPagesSpecifyCache | critical | Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination |
| MmGetSystemRoutineAddress | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| ZwSetValueKey | medium | Moderate risk - system modification capability |
| ZwCreateKey | medium | Moderate risk - system modification capability |
| ObOpenObjectByPointer | medium | Moderate risk - system modification capability |
| KeDelayExecutionThread | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| IoCreateDevice | low | Standard kernel API - generally benign |
| ZwQueryValueKey | low | Standard kernel API - generally benign |
| ZwClose | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| PsGetCurrentProcess | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| ZwOpenKey | low | Standard kernel API - generally benign |
| IoCreateDeviceSecure | low | Standard kernel API - generally benign |
| IoDeleteSymbolicLink | 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 |
|---|---|---|---|
| 0x0080838B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #226 |
| 0x0080B58B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #3426 |
| 0x00808D8B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #866 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x00806B0D | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #2755 |
| 0x00809F01 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #1984 |
| 0x0080EC81 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #2848 |
| 0x00808389 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #226 |
| 0x00340030 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #12 |
| 0x0080248C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2339 |
| 0x0034BED8 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #4022 |
| 0x00340390 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #228 |
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 | 0x8229 | 0x8400 | 6.12 | CODE, EXEC, READ |
| .rdata | 0x1478 | 0x1600 | 4.88 | IDATA, READ |
| .data | 0x04E0 | 0x0400 | 1.39 | IDATA, READ, WRITE |
| .pdata | 0x0780 | 0x0800 | 4.4 | IDATA, READ |
| .idata | 0x0DD8 | 0x0E00 | 4.58 | IDATA, READ |
| PAGE | 0x3250 | 0x3400 | 6.22 | CODE, EXEC, READ |
| INIT | 0x0542 | 0x0600 | 5.54 | CODE, EXEC, READ, DISCARD |
| GFIDS | 0x007C | 0x0200 | 1.08 | IDATA, READ, DISCARD |
| .rsrc | 0x14A8 | 0x1600 | 3.49 | IDATA, READ, DISCARD |
| .reloc | 0x0894 | 0x0A00 | 5.07 | IDATA, READ, DISCARD |
| Control Flow Guard | Enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Not enforced |
| Mitigation score | 80 / 100 |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1003.001 | OS Credential Dumping: LSASS Memory | Credential Access |
| T1055.012 | Process Hollowing | Defense Evasion |
| T1068 | Exploitation for Privilege Escalation | Privilege Escalation |
| T1112 | Modify Registry | Defense Evasion |
| T1211 | Exploitation for Defense Evasion | Defense Evasion |
| T1543.003 | Windows Service | Persistence |
| T1547.001 | Registry Run Keys | Persistence |
| T1553.002 | Subvert Trust Controls: Code Signing | Defense Evasion |
| T1553.006 | Code Signing Policy Modification | Defense Evasion |
| T1569.002 | Service Execution | Execution |
| T1652 | Device Driver Discovery | Discovery |
Engine angr, status no_findings, 0 paths explored at a maximum depth of 0. Vulnerability classes reached: 0. Exploitable paths: 0.
Based on DriverShield static and dynamic analysis, ndisuio.sys is assessed as clean, with no notable risk signals. Its composite risk score is 25/100 (verdict: clean). Always validate findings independently before acting.
ndisuio.sys has a DriverShield composite risk score of 25/100, placing it in the clean verdict band. SHA256: 3d7685d3960382fb102e225634d54a2370da53deb89cae4765ad00c9afe030b7.
ndisuio.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators.
Related: What an IOCTL dispatch code is · BYOVD research index · full driver database · CVE library · code signing atlas