Analysis of wintun.sys: clean verdict, risk score 27/100. 1 YARA match, 0/75 multi-engine detections. SHA256 1a7bb3555c5419be. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver wintun.sys and assigned a verdict of Clean with a composite risk score of 27/100, indicating no notable risk signals (0-29 band).
| Verdict | Clean (27/100) |
| YARA matches | 1 |
| Multi-engine detections | 0 / 75 |
| File size | 29592 bytes |
| Code-signing signer | Microsoft Windows Hardware Compatibility Publisher |
| Analyzed | 2026-05-03 |
| SHA256 | 1a7bb3555c5419befb1a5f54267dcae9a7af16749ddf4eef9b431fcf0b863110 |
| SHA1 | 1e0dd7b0d0c0b880bf6864134d1e792e80e875fc |
| MD5 | 43d91124fe8112d0027842824dad7326 |
Version resource data embedded in the wintun.sys PE header, as extracted by the analysis engine.
| File description | Wintun Driver |
|---|---|
| Product | Wintun Driver |
| Company | WireGuard LLC |
| Original filename | wintun.sys |
| Internal name | wintun.sys |
| File version | 0.14 |
| Copyright | Copyright © 2018-2021 WireGuard LLC. 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 | 5 / 100 |
| Dangerous kernel imports | 100 / 100 |
| IOCTL dispatch surface | 33 / 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 wintun.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapLockedPagesSpecifyCache | critical | Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination |
| PsSetCreateProcessNotifyRoutine | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| MmGetSystemRoutineAddress | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| PsLookupProcessByProcessId | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| ZwQuerySystemInformation | medium | Moderate risk - system modification capability |
| KeBugCheckEx | medium | Moderate risk - system modification capability |
| NtQuerySystemInformation | medium | Moderate risk - system modification capability |
| ObReferenceObjectByHandle | medium | Moderate risk - system modification capability |
| SeAccessCheck | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| KeSetEvent | low | Standard kernel API - generally benign |
| KeWaitForSingleObject | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| KeInitializeEvent | low | Standard kernel API - generally benign |
| ZwClose | 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 |
| 0x008024BC | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2351 |
| 0x0080B809 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3586 |
| 0x008024B4 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2349 |
| 0x0022DF15 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #1989 |
| 0x0022A715 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #2501 |
| 0x00226315 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #2245 |
| 0x0080248C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2339 |
| 0x00808389 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #226 |
| 0x0034034C | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #211 |
| 0x00340031 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #12 |
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 | 0x267E | 0x2800 | 5.92 | CODE, EXEC, READ |
| .rdata | 0x0A14 | 0x0C00 | 3.49 | IDATA, READ |
| .data | 0x0218 | 0x0200 | 1.69 | IDATA, READ, WRITE |
| .pdata | 0x02B8 | 0x0400 | 2.97 | IDATA, READ |
| INIT | 0x0CB4 | 0x0E00 | 5.4 | CODE, EXEC, READ, DISCARD |
| .rsrc | 0x03B0 | 0x0400 | 3.07 | IDATA, READ, DISCARD |
| .reloc | 0x0030 | 0x0200 | 0.62 | IDATA, READ, DISCARD |
| Control Flow Guard | Enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Not enforced |
| Mitigation score | 85 / 100 |
| Rule | Severity | Detects |
|---|---|---|
| SUSP_Callbacks | medium | Kernel callback registration |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1003.001 | OS Credential Dumping: LSASS Memory | Credential Access |
| T1014 | Rootkit | Defense Evasion |
| T1055.001 | Process Injection: DLL Injection | 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 |
| T1489 | Service Stop | Impact |
| T1543.003 | Windows Service | Persistence |
| T1553.002 | Subvert Trust Controls: Code Signing | Defense Evasion |
| T1562.001 | Impair Defenses: Disable/Modify Tools | Defense Evasion |
| T1562.006 | Indicator Blocking | Defense Evasion |
| T1564.001 | Hidden Files and Directories | Defense Evasion |
| T1569.002 | System Services: Service Execution | Execution |
| T1652 | Device Driver Discovery | Discovery |
| Signer | Microsoft Windows Hardware Compatibility Publisher |
|---|---|
| Signer organisation | Microsoft Corporation |
| Issuer | Microsoft Windows Third Party Component CA 2012 |
| Serial | 33000000B5213FCA1E4AA03DE40000000000B5 |
| Valid from | 2020-12-15 22:15 UTC |
| Valid until | 2021-12-02 22:15 UTC (expired) |
| Signature validity | Not verified |
Engine angr, status static_approximation, 0 paths explored at a maximum depth of 0. Vulnerability classes reached: 0. Exploitable paths: 2.
Based on DriverShield static and dynamic analysis, wintun.sys is assessed as clean, with no notable risk signals. Its composite risk score is 27/100 (verdict: clean). Always validate findings independently before acting.
wintun.sys has a DriverShield composite risk score of 27/100, placing it in the clean verdict band. SHA256: 1a7bb3555c5419befb1a5f54267dcae9a7af16749ddf4eef9b431fcf0b863110.
wintun.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators. It is code-signed by Microsoft Windows Hardware Compatibility Publisher.
Related: Other drivers signed by Microsoft Windows Hardware Compatibility Publisher · What an IOCTL dispatch code is · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas