Analysis of AsrDrv.sys: vulnerable verdict, risk score 72/100. 4 YARA matches, 1/75 multi-engine detections. SHA256 2003b478b9fd1b3d. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver AsrDrv.sys and assigned a verdict of Vulnerable with a composite risk score of 72/100, indicating a known or likely vulnerability surface (60-79 band).
| Verdict | Vulnerable (72/100) |
| YARA matches | 4 |
| Multi-engine detections | 1 / 75 |
| File size | 34568 bytes |
| Code-signing signer | Symantec Time Stamping Services CA - G2 |
| Analyzed | 2026-09-06 |
| SHA256 | 2003b478b9fd1b3d76ec5bf4172c2e8915babbbee7ad1783794acbf8d4c2519d |
| SHA1 | 15d1a6a904c8409fb47a82aefa42f8c3c7d8c370 |
| MD5 | 7c72a7e1d42b0790773efd8700e24952 |
Version resource data embedded in the AsrDrv.sys PE header, as extracted by the analysis engine.
| File description | ASRock IO Driver |
|---|---|
| Product | ASRock IO Driver |
| Company | ASRock Incorporation |
| Original filename | AsrDrv.sys |
| Internal name | AsrDrv.sys |
| File version | 1.00.00.0000 built by: WinDDK |
| Copyright | Copyright (C) 2012 ASRock Incorporation |
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 | 90 / 100 |
| Dangerous kernel imports | 100 / 100 |
| IOCTL dispatch surface | 30 / 100 |
| Known-vulnerable corpus | 100 / 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 AsrDrv.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapIoSpace | 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 |
| MmAllocateContiguousMemorySpecifyCache | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| MmGetPhysicalAddress | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| KeBugCheckEx | medium | Moderate risk - system modification capability |
| ObOpenObjectByPointer | medium | Moderate risk - system modification capability |
| ZwCreateKey | medium | Moderate risk - system modification capability |
| ZwSetValueKey | medium | Moderate risk - system modification capability |
| MmUnmapIoSpace | medium | Moderate risk - system modification capability |
| IoDeleteSymbolicLink | low | Standard kernel API - generally benign |
| ZwClose | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| IoCreateDevice | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| ZwQueryValueKey | low | Standard kernel API - generally benign |
| ZwOpenKey | low | Standard kernel API - generally benign |
| IoCreateDeviceSecure | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | 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 |
| 0x0022E808 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #2562 |
| 0x0022E85C | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #2583 |
| 0x00341705 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #1473 |
| 0x00340305 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #193 |
| 0x00225F15 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #1989 |
| 0x0080B389 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3298 |
| 0x00340030 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #12 |
| 0x0080C481 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #288 |
| 0x00340340 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #208 |
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 | 0x2238 | 0x2400 | 6.12 | CODE, EXEC, READ |
| .rdata | 0x07C4 | 0x0800 | 4.39 | IDATA, READ |
| .data | 0x031C | 0x0400 | 1.12 | IDATA, READ, WRITE |
| .pdata | 0x02B8 | 0x0400 | 3.1 | IDATA, READ |
| PAGE | 0x1A47 | 0x1C00 | 6.04 | CODE, EXEC, READ |
| INIT | 0x093A | 0x0A00 | 5.15 | CODE, EXEC, READ, WRITE, DISCARD |
| .rsrc | 0x03A0 | 0x0400 | 3.05 | IDATA, READ, DISCARD |
| .reloc | 0x0060 | 0x0200 | 0.32 | IDATA, READ, DISCARD |
| Control Flow Guard | Not enabled |
|---|---|
| ASLR | Not enabled |
| DEP | Not enabled |
| Integrity check | Not enforced |
| Mitigation score | 5 / 100 |
| Rule | Severity | Detects |
|---|---|---|
| PUA_VULN_Driver_Asrockincorporation_Asrdrvsys_Asrockiodriver_2003 | medium | Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - AsrDrv103.sys. Investigate matches in context: expected filenames or standar... |
| PUA_VULN_Driver_Asrockincorporation_Asrdrvsys_Asrockiodriver_4D03 | medium | Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - AsrDrv.sys |
| BYOVD_MemRW | critical | Phys memory mapping + device creation |
| SUSP_PhysMem | high | Physical memory mapping |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1003 | OS Credential Dumping | Credential Access |
| T1003.001 | OS Credential Dumping: LSASS Memory | Credential Access |
| T1006 | Direct Volume Access | 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 |
| T1543.003 | Windows Service | Persistence |
| T1547.001 | Registry Run Keys | 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 | 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 completed, 24 paths explored at a maximum depth of 24. Vulnerability classes reached: 0. Exploitable paths: 1.
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, AsrDrv.sys is flagged as vulnerable and is a potential Bring Your Own Vulnerable Driver (BYOVD) risk. Its composite risk score is 72/100 (verdict: vulnerable). Always validate findings independently before acting.
AsrDrv.sys has a DriverShield composite risk score of 72/100, placing it in the vulnerable verdict band. SHA256: 2003b478b9fd1b3d76ec5bf4172c2e8915babbbee7ad1783794acbf8d4c2519d.
AsrDrv.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 · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas