Analysis of XunYouFilter.sys: suspicious verdict, risk score 32/100. 0 YARA matches, 0/76 multi-engine detections. SHA256 c9d5f1c5c6bcb263. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver XunYouFilter.sys and assigned a verdict of Suspicious with a composite risk score of 32/100, indicating some risk signals warranting review (30-59 band).
| Verdict | Suspicious (32/100) |
| YARA matches | 0 |
| Multi-engine detections | 0 / 76 |
| File size | 117808 bytes |
| Code-signing signer | Microsoft Windows Hardware Compatibility Publisher |
| Analyzed | 2026-09-16 |
| SHA256 | c9d5f1c5c6bcb263172867208cc79dae98c2b33a1aa44e23c90ca0d3dfeca196 |
| SHA1 | 837f25c2be2b5daaffded9b8cb39ab265a5280ca |
| MD5 | 0f4bc2aec9fbb85ae279a1b8beafe73d |
Version resource data embedded in the XunYouFilter.sys PE header, as extracted by the analysis engine.
| File description | XunYouFilter WFP Driver |
|---|---|
| Product | 6 ProductVersion |
| Company | Sichuan XunYou Network Technology Co. |
| Original filename | XunYouFilter.sys |
| Internal name | XunYouFilter.sys |
| File version | 1.0.0.50 |
| Copyright | Copyright @ XunYou.com |
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 | 78 / 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 XunYouFilter.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapLockedPagesSpecifyCache | critical | Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination |
| 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 |
| ZwQuerySystemInformation | medium | Moderate risk - system modification capability |
| KeBugCheckEx | medium | Moderate risk - system modification capability |
| ObOpenObjectByPointer | medium | Moderate risk - system modification capability |
| ObReferenceObjectByHandle | medium | Moderate risk - system modification capability |
| ZwClose | low | Standard kernel API - generally benign |
| ZwQueryValueKey | low | Standard kernel API - generally benign |
| KeInitializeEvent | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| ZwOpenKey | low | Standard kernel API - generally benign |
| KeWaitForSingleObject | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| KeSetEvent | low | Standard kernel API - generally benign |
| IoDeleteSymbolicLink | low | Standard kernel API - generally benign |
| IoCreateDevice | 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 |
|---|---|---|---|
| 0x0080840F | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #259 |
| 0x0080978B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #1506 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x008024BC | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2351 |
| 0x00808189 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #98 |
| 0x0080C481 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #288 |
| 0x00226FE8 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #3066 |
| 0x0080249C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2343 |
| 0x0022BFE8 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #4090 |
| 0x00220C41 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #784 |
| 0x00808889 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #546 |
| 0x00808B8D | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #739 |
| 0x0080EF15 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3013 |
| 0x0080248C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2339 |
| 0x0034A7E8 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #2554 |
| 0x0080898D | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #611 |
| 0x0080BF8D | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #4067 |
| 0x00342715 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #2501 |
| 0x0080868D | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #419 |
| 0x008024B4 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2349 |
| 0x00227715 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #3525 |
| 0x00223315 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #3269 |
| 0x0022AF15 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #3013 |
| 0x00340069 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #26 |
Showing 24 of 26 extracted control codes.
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 | 0x1189F | 0x11A00 | 6.18 | CODE, EXEC, READ |
| .rdata | 0x2054 | 0x2200 | 4.63 | IDATA, READ |
| .data | 0x1BC0 | 0x0A00 | 2.13 | IDATA, READ, WRITE |
| .pdata | 0x1038 | 0x1200 | 4.69 | IDATA, READ |
| INIT | 0x0916 | 0x0A00 | 5.07 | CODE, EXEC, READ, WRITE, DISCARD |
| .rsrc | 0x03F8 | 0x0400 | 3.49 | IDATA, READ, DISCARD |
| .reloc | 0x0278 | 0x0400 | 2.69 | IDATA, READ, DISCARD |
| Control Flow Guard | Not enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Not enforced |
| Mitigation score | 55 / 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 Hardware Compatibility Publisher |
|---|---|
| Signer organisation | Microsoft Corporation |
| Issuer | Microsoft Windows Third Party Component CA 2014 |
| Serial | 330000006E1229856F0ADE6CFC00000000006E |
| Valid from | 2024-10-10 19:04 UTC |
| Valid until | 2025-10-08 19:04 UTC (expired) |
| Signature validity | Not verified |
Engine angr, status completed, 59 paths explored at a maximum depth of 59. Vulnerability classes reached: 0. Exploitable paths: 0.
Based on DriverShield static and dynamic analysis, XunYouFilter.sys shows some suspicious signals and warrants manual review. Its composite risk score is 32/100 (verdict: suspicious). Always validate findings independently before acting.
XunYouFilter.sys has a DriverShield composite risk score of 32/100, placing it in the suspicious verdict band. SHA256: c9d5f1c5c6bcb263172867208cc79dae98c2b33a1aa44e23c90ca0d3dfeca196.
XunYouFilter.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 Hardware Compatibility Publisher.
Related: Other drivers signed by Microsoft Windows Hardware Compatibility Publisher · What an IOCTL dispatch code is · BYOVD research index · full driver database · CVE library · code signing atlas