Analysis of vmdrv.sys: clean verdict, risk score 26/100. 2 YARA matches, 1/75 multi-engine detections. SHA256 32cccc4f24949906. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver vmdrv.sys and assigned a verdict of Clean with a composite risk score of 26/100, indicating no notable risk signals (0-29 band).
| Verdict | Clean (26/100) |
| YARA matches | 2 |
| Multi-engine detections | 1 / 75 |
| File size | 46952 bytes |
| Code-signing signer | DigiCert Global G3 Code Signing ECC SHA384 2021 CA1 |
| Analyzed | 2026-09-06 |
| SHA256 | 32cccc4f249499061c0afa18f534c825d01034a1f6815f5506bf4c4ff55d1351 |
| SHA1 | 4c18754dca481f107f0923fb8ef5e149d128525d |
| MD5 | d5db81974ffda566fa821400419f59be |
Version resource data embedded in the vmdrv.sys PE header, as extracted by the analysis engine.
| File description | Voicemod Virtual Audio Device (WDM) |
|---|---|
| Product | Windows (R) Win 7 DDK driver |
| Company | Windows (R) Win 7 DDK provider |
| Original filename | vmdrv.sys |
| Internal name | vmdrv.sys |
| File version | 10.0.10011.16384 |
| Copyright | Copyright (C) Voicemod S.L.2010-2020 |
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 | 10 / 100 |
| Dangerous kernel imports | 63 / 100 |
| IOCTL dispatch surface | 33 / 100 |
| Known-vulnerable corpus | 100 / 100 |
| Code-signing state | 0 / 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 vmdrv.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| ObReferenceObjectByHandle | medium | Moderate risk - system modification capability |
| KeSetEvent | low | Standard kernel API - generally benign |
| IoCreateDevice | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| KeWaitForSingleObject | low | Standard kernel API - generally benign |
| IoDeleteSymbolicLink | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| ExFreePool | low | Standard kernel API - generally benign |
| IofCompleteRequest | 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 |
|---|---|---|---|
| 0x0080BA1F | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #3719 |
| 0x0080808B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #34 |
| 0x0080818B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #98 |
| 0x0080868B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #418 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x0080BAC9 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3762 |
| 0xC3505189 | medium | METHOD_IN_DIRECT | CUSTOM_MSI Function #1122 |
| 0x00808789 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #482 |
| 0x00808389 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #226 |
| 0x00340374 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #221 |
| 0x00340038 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #14 |
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 | 0x1466 | 0x1600 | 5.51 | CODE, EXEC, READ |
| .rdata | 0x1440 | 0x1600 | 4.42 | IDATA, READ |
| .data | 0x072C | 0x0800 | 1.8 | IDATA, READ, WRITE |
| .pdata | 0x0570 | 0x0600 | 4.06 | IDATA, READ |
| PAGE | 0x2E8A | 0x3000 | 5.95 | CODE, EXEC, READ |
| INIT | 0x06DA | 0x0800 | 4.91 | CODE, EXEC, READ, DISCARD |
| .rsrc | 0x0460 | 0x0600 | 2.81 | IDATA, READ, DISCARD |
| .reloc | 0x0188 | 0x0200 | 4.5 | IDATA, READ, DISCARD |
| Control Flow Guard | Enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Not enforced |
| Mitigation score | 100 / 100 |
| Rule | Severity | Detects |
|---|---|---|
| PUA_VULN_Driver_Windowsrwinddkprovider_Vmdrvsys_Windowsrwinddkdriver_32CC | medium | Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - vmdrv.sys. Investigate matches in context: expected filenames or standard ve... |
| PUA_VULN_Driver_Windowsrwinddkprovider_Vmdrvsys_Windowsrwinddkdriver_5C0B | medium | Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - vmdrv.sys |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1068 | Exploitation for Privilege Escalation | Privilege Escalation |
| T1071 | Application Layer Protocol | Command and Control |
| T1211 | Exploitation for Defense Evasion | Defense Evasion |
| 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 |
| T1652 | Device Driver Discovery | Discovery |
| Signer | DigiCert Global G3 Code Signing ECC SHA384 2021 CA1 |
|---|---|
| Signer organisation | DigiCert, Inc. |
| Issuer | DigiCert Global Root G3 |
| Serial | FB8A740B9158D035143BC59D9F04029 |
| Valid from | 2021-04-29 00:00 UTC |
| Valid until | 2036-04-28 23:59 UTC |
| Signature validity | Verified |
Engine angr, status completed, 24 paths explored at a maximum depth of 24. 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, vmdrv.sys is assessed as clean, with no notable risk signals. Its composite risk score is 26/100 (verdict: clean). Always validate findings independently before acting.
vmdrv.sys has a DriverShield composite risk score of 26/100, placing it in the clean verdict band. SHA256: 32cccc4f249499061c0afa18f534c825d01034a1f6815f5506bf4c4ff55d1351.
vmdrv.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators. It is code-signed by DigiCert Global G3 Code Signing ECC SHA384 2021 CA1.
Related: Other drivers signed by DigiCert Global G3 Code Signing ECC SHA384 2021 CA1 · What an IOCTL dispatch code is · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas