Analysis of hvcrash.sys: clean verdict, risk score 16/100. 0 YARA matches. SHA256 e3107ed392eb1ad3. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver hvcrash.sys and assigned a verdict of Clean with a composite risk score of 16/100, indicating no notable risk signals (0-29 band).
| Verdict | Clean (16/100) |
| YARA matches | 0 |
| File size | 36208 bytes |
| Code-signing signer | Microsoft Windows |
| Analyzed | 2026-03-22 |
| SHA256 | e3107ed392eb1ad3f098a3b318329b20e2269332d22cfe8dbdff749e4c4a5985 |
| SHA1 | 5f4f641e455818bf70f8c9e341d10709e5da8b68 |
| MD5 | 323219086f382d3c99f0375494f865f7 |
Version resource data embedded in the hvcrash.sys PE header, as extracted by the analysis engine.
| File description | Hyper-V Crashdump |
|---|---|
| Product | Microsoft® Windows® Operating System |
| Company | Microsoft Corporation |
| Original filename | hvcrash.sys |
| Internal name | hvcrash.sys |
| File version | 10.0.19041.3636 (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 | 45 / 100 |
| IOCTL dispatch surface | 27 / 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 hvcrash.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapLockedPagesSpecifyCache | critical | Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| DbgPrintEx | low | Standard kernel API - generally benign |
| DbgPrint | low | Standard kernel API - generally benign |
| ExFreePool | 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 |
| 0x00221BE8 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #1786 |
| 0x00343F3D | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #4047 |
| 0x0080EC81 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #2848 |
| 0x00340121 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #72 |
| 0x00802494 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2341 |
| 0x00228341 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #208 |
| 0x0080C481 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #288 |
| 0x0034038C | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #227 |
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 | 0x2829 | 0x2A00 | 5.92 | CODE, EXEC, READ |
| .rdata | 0x1198 | 0x1200 | 5.29 | IDATA, READ |
| .data | 0x03B0 | 0x0200 | 0.81 | IDATA, READ, WRITE |
| .pdata | 0x027C | 0x0400 | 2.8 | IDATA, READ |
| .idata | 0x039C | 0x0400 | 3.77 | IDATA, READ |
| PAGE | 0x105B | 0x1200 | 5.78 | CODE, EXEC, READ |
| INIT | 0x01B6 | 0x0200 | 5.22 | CODE, EXEC, READ, DISCARD |
| GFIDS | 0x0040 | 0x0200 | 0.59 | IDATA, READ, DISCARD |
| .rsrc | 0x03F0 | 0x0400 | 3.37 | IDATA, READ, DISCARD |
| .reloc | 0x0214 | 0x0400 | 3.13 | IDATA, READ, DISCARD |
| Control Flow Guard | Enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Not enforced |
| Mitigation score | 85 / 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 |
| 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 |
| T1569.002 | Service Execution | Execution |
| T1652 | Device Driver Discovery | Discovery |
| Signer | Microsoft Windows |
|---|---|
| Signer organisation | Microsoft Corporation |
| Issuer | Microsoft Windows Production PCA 2011 |
| Serial | 33000004158295A1A3D82E2857000000000415 |
| Valid from | 2023-02-03 00:05 UTC |
| Valid until | 2024-02-01 00:05 UTC (expired) |
| Signature validity | Not verified |
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, hvcrash.sys is assessed as clean, with no notable risk signals. Its composite risk score is 16/100 (verdict: clean). Always validate findings independently before acting.
hvcrash.sys has a DriverShield composite risk score of 16/100, placing it in the clean verdict band. SHA256: e3107ed392eb1ad3f098a3b318329b20e2269332d22cfe8dbdff749e4c4a5985.
hvcrash.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