Analysis of UevAgentDriver.sys: clean verdict, risk score 20/100. 1 YARA match. SHA256 144c749ff6432325. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver UevAgentDriver.sys and assigned a verdict of Clean with a composite risk score of 20/100, indicating no notable risk signals (0-29 band).
| Verdict | Clean (20/100) |
| YARA matches | 1 |
| File size | 42456 bytes |
| Code-signing signer | Microsoft Windows |
| Analyzed | 2026-03-22 |
| SHA256 | 144c749ff6432325a66339d5d6495d6b3b311c7e44ce074d16f526646ff59690 |
| SHA1 | 51dc3897eebda501d5e3f6539f1ad779aa47a6d0 |
| MD5 | c6170668de1233c3c137de442d3310dd |
Version resource data embedded in the UevAgentDriver.sys PE header, as extracted by the analysis engine.
| File description | Microsoft User Experience Virtualization Agent Driver |
|---|---|
| Product | Microsoft® Windows® Operating System |
| Company | Microsoft Corporation |
| Original filename | UevAgentDriver.sys |
| Internal name | Microsoft User Experience Virtualization Agent Driver |
| 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 | 5 / 100 |
| Dangerous kernel imports | 72 / 100 |
| IOCTL dispatch surface | 15 / 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 UevAgentDriver.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| PsSetCreateProcessNotifyRoutineEx | 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 |
| ZwClose | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| ZwOpenKey | low | Standard kernel API - generally benign |
| DbgPrintEx | low | Standard kernel API - generally benign |
| ZwQueryValueKey | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| KeDelayExecutionThread | 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 |
| 0x00220020 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #8 |
| 0x0080EC81 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #2848 |
| 0x0080C481 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #288 |
| 0x00340438 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #270 |
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 | 0x0B24 | 0x0C00 | 5.79 | CODE, EXEC, READ |
| .rdata | 0x2CE0 | 0x2E00 | 4.98 | IDATA, READ |
| .data | 0x0228 | 0x0200 | 0.82 | IDATA, READ, WRITE |
| .pdata | 0x0348 | 0x0400 | 3.58 | IDATA, READ |
| .idata | 0x07C6 | 0x0800 | 4.3 | IDATA, READ |
| PAGE | 0x1CE2 | 0x1E00 | 5.79 | CODE, EXEC, READ |
| INIT | 0x0794 | 0x0800 | 5.83 | CODE, EXEC, READ, DISCARD |
| GFIDS | 0x0030 | 0x0200 | 0.43 | IDATA, READ, DISCARD |
| .rsrc | 0x0690 | 0x0800 | 2.85 | IDATA, READ, DISCARD |
| .reloc | 0x0248 | 0x0400 | 3.34 | IDATA, READ, DISCARD |
| Control Flow Guard | Enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Enforced |
| Mitigation score | 90 / 100 |
| Rule | Severity | Detects |
|---|---|---|
| SUSP_Callbacks | medium | Kernel callback registration |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1014 | Rootkit | Defense Evasion |
| T1055.001 | Process Injection: DLL Injection | Defense Evasion |
| 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 |
| T1562.006 | Indicator Blocking | Defense Evasion |
| T1564.001 | Hidden Files and Directories | Defense Evasion |
| 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, UevAgentDriver.sys is assessed as clean, with no notable risk signals. Its composite risk score is 20/100 (verdict: clean). Always validate findings independently before acting.
UevAgentDriver.sys has a DriverShield composite risk score of 20/100, placing it in the clean verdict band. SHA256: 144c749ff6432325a66339d5d6495d6b3b311c7e44ce074d16f526646ff59690.
UevAgentDriver.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 · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas