Analysis of hvservice.sys: clean verdict, risk score 26/100. 0 YARA matches, 0/76 multi-engine detections. SHA256 f44b2395dfe6e097. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver hvservice.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 | 0 |
| Multi-engine detections | 0 / 76 |
| File size | 99752 bytes |
| Code-signing signer | Microsoft Windows |
| Analyzed | 2026-04-01 |
| SHA256 | f44b2395dfe6e0972309bb4d5060b48ce0b0bdde9082f024869a1bb3bc4ef37a |
| SHA1 | db09c900099512b753e0dd03c8f01e481db4440a |
| MD5 | 05938a14d0e3a3be9b78dd1e499d36bf |
Version resource data embedded in the hvservice.sys PE header, as extracted by the analysis engine.
| File description | Hypervisor Boot Driver |
|---|---|
| Product | Microsoft® Windows® Operating System |
| Company | Microsoft Corporation |
| Original filename | HvService.sys |
| Internal name | HvService.sys |
| File version | 10.0.26100.7309 (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 | 60 / 100 |
| Known-vulnerable corpus | 0 / 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 hvservice.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapLockedPagesSpecifyCache | critical | Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination |
| ZwSetValueKey | medium | Moderate risk - system modification capability |
| ObReferenceObjectByHandle | medium | Moderate risk - system modification capability |
| ZwCreateKey | medium | Moderate risk - system modification capability |
| ZwQuerySystemInformation | medium | Moderate risk - system modification capability |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| ZwClose | low | Standard kernel API - generally benign |
| IoDeleteSymbolicLink | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| KeInitializeEvent | low | Standard kernel API - generally benign |
| KeWaitForSingleObject | low | Standard kernel API - generally benign |
| PsGetCurrentProcess | low | Standard kernel API - generally benign |
| ZwQueryValueKey | low | Standard kernel API - generally benign |
| ZwOpenFile | low | Standard kernel API - generally benign |
| KeSetEvent | low | Standard kernel API - generally benign |
| KeDelayExecutionThread | low | Standard kernel API - generally benign |
| IoCreateDevice | low | Standard kernel API - generally benign |
| ExAllocatePool2 | low | Standard kernel API - generally benign |
| ZwOpenKey | 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 |
|---|---|---|---|
| 0x0022341F | high | METHOD_NEITHER | FILE_DEVICE_UNKNOWN Function #3335 |
| 0x0080858B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #354 |
| 0x00805AB3 | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #1708 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x00808189 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #98 |
| 0x00800046 | medium | METHOD_OUT_DIRECT | FILE_DEVICE_CUSTOM Function #17 |
| 0x0022706D | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #3099 |
| 0x0080009D | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #39 |
| 0x00220020 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #8 |
| 0x008024A4 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2345 |
| 0x0022B941 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #3664 |
| 0x0022F981 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #3680 |
| 0x00802500 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2368 |
| 0x0022800C | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #3 |
| 0x00228040 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #16 |
| 0x0080B900 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #3648 |
| 0x00808389 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #226 |
| 0x00223D00 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #3904 |
| 0x003403A0 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #232 |
| 0x00228024 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #9 |
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 | 0x2CF7 | 0x3000 | 5.89 | CODE, EXEC, READ |
| fothk | 0x1000 | 0x1000 | 0.03 | CODE, EXEC, READ |
| .rdata | 0x1E48 | 0x2000 | 5.01 | IDATA, READ |
| .data | 0x0520 | 0x1000 | 0.26 | IDATA, READ, WRITE |
| .pdata | 0x07C8 | 0x1000 | 2.6 | IDATA, READ |
| .idata | 0x1906 | 0x2000 | 3.88 | IDATA, READ |
| INITCONS | 0x0034 | 0x1000 | 0.07 | IDATA, READ |
| PAGE | 0x5D7B | 0x6000 | 6.1 | CODE, EXEC, READ |
| INIT | 0x0366 | 0x1000 | 1.86 | CODE, EXEC, READ, DISCARD |
| GFIDS | 0x0090 | 0x1000 | 0.23 | IDATA, READ, DISCARD |
| .rsrc | 0x0628 | 0x1000 | 1.53 | IDATA, READ, DISCARD |
| .reloc | 0x0794 | 0x1000 | 3.1 | IDATA, READ, DISCARD |
| Control Flow Guard | Enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Not enforced |
| Mitigation score | 100 / 100 |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1003.001 | OS Credential Dumping: LSASS Memory | Credential Access |
| 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 |
| T1112 | Modify Registry | Defense Evasion |
| T1211 | Exploitation for Defense Evasion | Defense Evasion |
| T1489 | Service Stop | Impact |
| T1543.003 | Windows Service | Persistence |
| T1547.001 | Registry Run Keys | Persistence |
| T1553.002 | Subvert Trust Controls: Code Signing | Defense Evasion |
| T1562.001 | Impair Defenses: Disable/Modify Tools | Defense Evasion |
| T1569.002 | Service Execution | Execution |
| T1652 | Device Driver Discovery | Discovery |
| Signer | Microsoft Windows |
|---|---|
| Signer organisation | Microsoft Corporation |
| Issuer | Microsoft Windows Production PCA 2011 |
| Serial | 3300000518418419ADCBAD294F000000000518 |
| Valid from | 2025-06-19 18:11 UTC |
| Valid until | 2026-06-17 18:11 UTC |
| Signature validity | Verified |
Engine angr, status completed, 100 paths explored at a maximum depth of 100. Vulnerability classes reached: 0. Exploitable paths: 0.
Based on DriverShield static and dynamic analysis, hvservice.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.
hvservice.sys has a DriverShield composite risk score of 26/100, placing it in the clean verdict band. SHA256: f44b2395dfe6e0972309bb4d5060b48ce0b0bdde9082f024869a1bb3bc4ef37a.
hvservice.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.
Related: Other drivers signed by Microsoft Windows · What an IOCTL dispatch code is · BYOVD research index · full driver database · CVE library · code signing atlas