Analysis of vmrawdsk.sys: clean verdict, risk score 28/100. 0 YARA matches. SHA256 5bcd36c442be09e8. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver vmrawdsk.sys and assigned a verdict of Clean with a composite risk score of 28/100, indicating no notable risk signals (0-29 band).
| Verdict | Clean (28/100) |
| YARA matches | 0 |
| File size | 65344 bytes |
| Code-signing signer | Symantec Time Stamping Services CA - G2 |
| Analyzed | 2026-03-22 |
| SHA256 | 5bcd36c442be09e8a4bde7a80d93b191e4279c9f8a225a3cdb4cd7bc808a2ea4 |
| SHA1 | 66390cc54ddc55994b4b56367aaee364c5d15828 |
| MD5 | 4e6695c7401a371366011abe04ae542a |
Version resource data embedded in the vmrawdsk.sys PE header, as extracted by the analysis engine.
| File description | VMware Raw Disk Helper Driver |
|---|---|
| Product | VMware Raw Disk Helper Driver |
| Company | VMware, Inc. |
| Original filename | vmrawdsk.sys |
| Internal name | vmrawdsk.sys |
| File version | 1.1.5.0 |
| Copyright | Copyright © 1998-2019 VMware, Inc. |
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 | 99 / 100 |
| IOCTL dispatch surface | 45 / 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 vmrawdsk.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| ZwDeleteKey | medium | Moderate risk - system modification capability |
| ZwSetValueKey | medium | Moderate risk - system modification capability |
| ZwWriteFile | medium | Moderate risk - system modification capability |
| ZwCreateKey | medium | Moderate risk - system modification capability |
| ZwSetInformationFile | medium | Moderate risk - system modification capability |
| KeBugCheckEx | medium | Moderate risk - system modification capability |
| ObReferenceObjectByHandle | medium | Moderate risk - system modification capability |
| ZwReadFile | low | Standard kernel API - generally benign |
| ZwCreateFile | low | Standard kernel API - generally benign |
| ZwOpenFile | low | Standard kernel API - generally benign |
| ZwClose | low | Standard kernel API - generally benign |
| ZwQueryInformationFile | low | Standard kernel API - generally benign |
| ZwOpenKey | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| ZwQueryValueKey | low | Standard kernel API - generally benign |
| DbgPrint | 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 |
|---|---|---|---|
| 0x00340033 | high | METHOD_NEITHER | FILE_DEVICE_DISK Function #12 |
| 0x00340043 | high | METHOD_NEITHER | FILE_DEVICE_DISK Function #16 |
| 0x00340037 | high | METHOD_NEITHER | FILE_DEVICE_DISK Function #13 |
| 0x00227417 | high | METHOD_NEITHER | FILE_DEVICE_UNKNOWN Function #3333 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x0080249C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2343 |
| 0x0034CBE8 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #762 |
| 0x00343DD8 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #3958 |
| 0x003403E8 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #250 |
| 0x0080430D | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #195 |
| 0x0022FFE8 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #4090 |
| 0x00802824 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2569 |
| 0x0034002D | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #11 |
| 0x00340348 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #210 |
| 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 | 0x7743 | 0x7800 | 6.39 | CODE, EXEC, READ |
| .rdata | 0x11F4 | 0x1200 | 4.53 | IDATA, READ |
| .data | 0x0038 | 0x0200 | 0.54 | IDATA, READ, WRITE |
| .pdata | 0x0354 | 0x0400 | 3.73 | IDATA, READ |
| INIT | 0x0414 | 0x0600 | 4 | CODE, EXEC, READ, DISCARD |
| .rsrc | 0x03A8 | 0x0400 | 3.12 | IDATA, READ, DISCARD |
| .reloc | 0x0020 | 0x0200 | 0.36 | 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 |
|---|---|---|
| T1071 | Application Layer Protocol | Command and Control |
| T1112 | Modify Registry | Defense Evasion |
| T1211 | Exploitation for Defense Evasion | Defense Evasion |
| T1543.003 | Windows Service | Persistence |
| T1547.001 | Registry Run Keys | Persistence |
| T1553.002 | Subvert Trust Controls: Code Signing | Defense Evasion |
| T1569.002 | System Services: Service Execution | Execution |
| T1652 | Device Driver Discovery | Discovery |
| Signer | Symantec Time Stamping Services CA - G2 |
|---|---|
| Signer organisation | Symantec Corporation |
| Issuer | Thawte Timestamping CA |
| Serial | 7E93EBFB7CC64E59EA4B9A77D406FC3B |
| Valid from | 2012-12-21 00:00 UTC |
| Valid until | 2020-12-30 23:59 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, vmrawdsk.sys is assessed as clean, with no notable risk signals. Its composite risk score is 28/100 (verdict: clean). Always validate findings independently before acting.
vmrawdsk.sys has a DriverShield composite risk score of 28/100, placing it in the clean verdict band. SHA256: 5bcd36c442be09e8a4bde7a80d93b191e4279c9f8a225a3cdb4cd7bc808a2ea4.
vmrawdsk.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators. It is code-signed by Symantec Time Stamping Services CA - G2.
Related: Other drivers signed by Symantec Time Stamping Services CA - G2 · What an IOCTL dispatch code is · BYOVD research index · full driver database · CVE library · code signing atlas