Analysis of AsrDrv.sys: vulnerable verdict, risk score 72/100. 3 YARA matches, 0/74 multi-engine detections. SHA256 837f499e9cd8e277. 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 | 3 |
| Multi-engine detections | 0 / 74 |
| File size | 68208 bytes |
| Code-signing signer | GlobalSign |
| Analyzed | 2026-08-15 |
| SHA256 | 837f499e9cd8e2774e66f001fc363e2dc5cf96cebb02a2778ca819c927430599 |
| SHA1 | c9f89081ff1b04fdd6f6cb02f4aa3c89d8352f5d |
| MD5 | 867748f9c9ce55abb8bea32b34dc57ee |
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 | 1.00.02.0000 |
| Copyright | Copyright (C) 2024 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 | 100 / 100 |
| Dangerous kernel imports | 100 / 100 |
| IOCTL dispatch surface | 42 / 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 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 |
| MmGetPhysicalAddress | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| PsLookupProcessByProcessId | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| 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 |
| ZwOpenProcess | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| ObOpenObjectByPointer | medium | Moderate risk - system modification capability |
| ObReferenceObjectByHandle | medium | Moderate risk - system modification capability |
| MmUnmapIoSpace | medium | Moderate risk - system modification capability |
| ZwSetValueKey | medium | Moderate risk - system modification capability |
| ZwCreateKey | medium | Moderate risk - system modification capability |
| DbgPrintEx | low | Standard kernel API - generally benign |
| ZwOpenFile | low | Standard kernel API - generally benign |
| ZwOpenKey | low | Standard kernel API - generally benign |
| DbgPrint | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| ZwQueryValueKey | low | Standard kernel API - generally benign |
| IoCreateDeviceSecure | low | Standard kernel API - generally benign |
| IoCreateDevice | 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 |
| 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 |
|---|---|---|---|
| 0x00343D07 | high | METHOD_NEITHER | FILE_DEVICE_DISK Function #3905 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x0022E84C | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #2579 |
| 0x0022E838 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #2574 |
| 0x00802484 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2337 |
| 0x003463E8 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #2298 |
| 0x00341315 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #1221 |
| 0x00800548 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #338 |
| 0x00224B15 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #709 |
| 0x00800020 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #8 |
| 0x00340030 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #12 |
| 0x0080248C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2339 |
| 0x00340320 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #200 |
| 0x00340032 | medium | METHOD_OUT_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 | 0x589E | 0x5A00 | 5.68 | CODE, EXEC, READ |
| .rdata | 0x0DF4 | 0x0E00 | 4.34 | IDATA, READ |
| .data | 0x1680 | 0x0400 | 1.26 | IDATA, READ, WRITE |
| .pdata | 0x0408 | 0x0600 | 3.08 | IDATA, READ |
| PAGE | 0x1C8C | 0x1E00 | 6.1 | CODE, EXEC, READ |
| INIT | 0x0C2E | 0x0E00 | 4.95 | CODE, EXEC, READ, DISCARD |
| .rsrc | 0x0408 | 0x0600 | 2.57 | IDATA, READ, DISCARD |
| .reloc | 0x0030 | 0x0200 | 0.58 | IDATA, READ, DISCARD |
| Control Flow Guard | Enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Enforced |
| Mitigation score | 100 / 100 |
| Rule | Severity | Detects |
|---|---|---|
| BYOVD_MemRW | critical | Phys memory mapping + device creation |
| SUSP_PhysMem | high | Physical memory mapping |
| MAL_DSEBypass | critical | DSE bypass attempt |
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 |
| T1055.001 | Process Injection: DLL Injection | Defense Evasion |
| T1055.012 | Process Hollowing | Defense Evasion |
| T1068 | Exploitation for Privilege Escalation | Privilege Escalation |
| 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 | GlobalSign |
|---|---|
| Signer organisation | GlobalSign |
| Issuer | GlobalSign Root CA |
| Serial | 1EE5F169DFF97352B6465D66A |
| Valid from | 2018-09-19 00:00 UTC |
| Valid until | 2028-01-28 12:00 UTC |
| Signature validity | Verified |
Engine angr, status completed, 100 paths explored at a maximum depth of 100. Vulnerability classes reached: 1. Exploitable paths: 4.
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: 837f499e9cd8e2774e66f001fc363e2dc5cf96cebb02a2778ca819c927430599.
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 GlobalSign.
Related: Other drivers signed by GlobalSign · What an IOCTL dispatch code is · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas