Analysis of vhf.sys: clean verdict, risk score 18/100. 0 YARA matches. SHA256 98188182d3284148. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver vhf.sys and assigned a verdict of Clean with a composite risk score of 18/100, indicating no notable risk signals (0-29 band).
| Verdict | Clean (18/100) |
| YARA matches | 0 |
| File size | 47616 bytes |
| Analyzed | 2026-03-22 |
| SHA256 | 98188182d328414832d06e957601a997ad2b2b0f088b089181ede8fab0af733c |
| SHA1 | 698c99b1f64a09c7d559f1d593e189735dea5a7f |
| MD5 | 7f2f04a354582d3d34f5b2b4eff07189 |
Version resource data embedded in the vhf.sys PE header, as extracted by the analysis engine.
| File description | Virtual HID Framework (VHF) Driver |
|---|---|
| Product | Microsoft® Windows® Operating System |
| Company | Microsoft Corporation |
| Original filename | VHF.SYS |
| Internal name | VHF.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 | 60 / 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 vhf.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 |
| DbgPrintEx | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | 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 |
| 0x00808705 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #449 |
| 0x0080248C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2339 |
| 0x0022BB46 | medium | METHOD_OUT_DIRECT | FILE_DEVICE_UNKNOWN Function #3793 |
| 0x00808F15 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #965 |
| 0x0080249C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2343 |
| 0x0034AF05 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #3009 |
| 0x0034A70D | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #2499 |
| 0x00340030 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #12 |
| 0x00343D1A | medium | METHOD_OUT_DIRECT | FILE_DEVICE_DISK Function #3910 |
| 0x0080EC81 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #2848 |
| 0x00340394 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #229 |
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 | 0x5B29 | 0x5C00 | 5.97 | CODE, EXEC, READ |
| .rdata | 0x1120 | 0x1200 | 5.26 | IDATA, READ |
| .data | 0x0498 | 0x0200 | 1.39 | IDATA, READ, WRITE |
| .pdata | 0x0474 | 0x0600 | 3.49 | IDATA, READ |
| .idata | 0x0628 | 0x0800 | 3.6 | IDATA, READ |
| PAGE | 0x267C | 0x2800 | 5.92 | CODE, EXEC, READ |
| INIT | 0x01F2 | 0x0200 | 5.61 | CODE, EXEC, READ, DISCARD |
| GFIDS | 0x005C | 0x0200 | 0.86 | IDATA, READ, DISCARD |
| .rsrc | 0x0408 | 0x0600 | 2.44 | IDATA, READ, DISCARD |
| .reloc | 0x0484 | 0x0600 | 4.88 | 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 |
| T1211 | Exploitation for Defense Evasion | Defense Evasion |
| T1543.003 | Windows Service | Persistence |
| T1553.002 | Subvert Trust Controls: Code Signing | Defense Evasion |
| T1553.006 | Code Signing Policy Modification | Defense Evasion |
| 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, vhf.sys is assessed as clean, with no notable risk signals. Its composite risk score is 18/100 (verdict: clean). Always validate findings independently before acting.
vhf.sys has a DriverShield composite risk score of 18/100, placing it in the clean verdict band. SHA256: 98188182d328414832d06e957601a997ad2b2b0f088b089181ede8fab0af733c.
vhf.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