Analysis of AppvVemgr.sys: vulnerable verdict, risk score 60/100. 1 YARA match, 0/75 multi-engine detections. SHA256 c8bcd77030f948a6. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver AppvVemgr.sys and assigned a verdict of Vulnerable with a composite risk score of 60/100, indicating a known or likely vulnerability surface (60-79 band).
| Verdict | Vulnerable (60/100) |
| YARA matches | 1 |
| Multi-engine detections | 0 / 75 |
| File size | 218432 bytes |
| Code-signing signer | Microsoft Windows |
| Analyzed | 2026-05-10 |
| SHA256 | c8bcd77030f948a6287adda728fcba6b4297dec9fe6a05cdeccef624075c8ae1 |
| SHA1 | a90fb6e87b9a7f2bd39fb6b267cfff4a84259674 |
| MD5 | 633a321028e777f0f5a9f055559f34ea |
Version resource data embedded in the AppvVemgr.sys PE header, as extracted by the analysis engine.
| File description | Microsoft Application Virtualization VE Manager Driver |
|---|---|
| Product | Microsoft® Windows® Operating System |
| Company | Microsoft Corporation |
| Original filename | AppvVemgr.sys |
| Internal name | AppvVemgr.sys |
| File version | 10.0.26100.1150 (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 | 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 AppvVemgr.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| ZwTerminateProcess | 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 |
| ZwOpenProcess | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| PsSetCreateProcessNotifyRoutineEx | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| ZwDeleteKey | medium | Moderate risk - system modification capability |
| IoGetDeviceObjectPointer | medium | Moderate risk - system modification capability |
| ZwSetValueKey | medium | Moderate risk - system modification capability |
| ZwCreateKey | medium | Moderate risk - system modification capability |
| ObOpenObjectByPointer | medium | Moderate risk - system modification capability |
| ObReferenceObjectByHandle | medium | Moderate risk - system modification capability |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| KeSetEvent | low | Standard kernel API - generally benign |
| IoBuildDeviceIoControlRequest | low | Standard kernel API - generally benign |
| IoCreateDeviceSecure | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| KeDelayExecutionThread | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| ZwOpenKey | low | Standard kernel API - generally benign |
| ZwQueryValueKey | low | Standard kernel API - generally benign |
| KeInitializeEvent | low | Standard kernel API - generally benign |
| ExAllocatePool2 | low | Standard kernel API - generally benign |
| KeWaitForSingleObject | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | 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 |
| ExAllocatePoolWithTag | 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 |
|---|---|---|---|
| 0x00809B8B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #1762 |
| 0x0080888B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #546 |
| 0x00809F8B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #2018 |
| 0x00343D0B | high | METHOD_NEITHER | FILE_DEVICE_DISK Function #3906 |
| 0x00220123 | high | METHOD_NEITHER | FILE_DEVICE_UNKNOWN Function #72 |
| 0x0080B58B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #3426 |
| 0x00808D8B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #866 |
| 0x0080EC81 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #2848 |
| 0x0080249C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2343 |
| 0x0080E9C0 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2672 |
| 0x0034B805 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #3585 |
| 0x0034BE05 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #3969 |
| 0x0034B800 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #3584 |
| 0x00343DF0 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #3964 |
| 0x00342404 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #2305 |
| 0x00802484 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2337 |
| 0x00343D41 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #3920 |
| 0x00343D50 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #3924 |
| 0x00221FE8 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #2042 |
| 0x0080938D | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #1251 |
| 0x0034FF81 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #4064 |
| 0x00802494 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2341 |
| 0x00340030 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #12 |
| 0x00800036 | medium | METHOD_OUT_DIRECT | FILE_DEVICE_CUSTOM Function #13 |
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 | 0x1B6F1 | 0x1C000 | 6.2 | CODE, EXEC, READ |
| fothk | 0x1000 | 0x1000 | 0.03 | CODE, EXEC, READ |
| .rdata | 0x8314 | 0x9000 | 3.86 | IDATA, READ |
| .data | 0x0520 | 0x1000 | 0.53 | IDATA, READ, WRITE |
| .pdata | 0x0FD8 | 0x1000 | 5.24 | IDATA, READ |
| .idata | 0x131A | 0x2000 | 3.36 | IDATA, READ |
| PAGE | 0x1A78 | 0x2000 | 5.62 | CODE, EXEC, READ |
| .edata | 0x0053 | 0x1000 | 0.17 | IDATA, READ |
| INIT | 0x04CB | 0x1000 | 2.49 | CODE, EXEC, READ, DISCARD |
| GFIDS | 0x010C | 0x1000 | 0.35 | IDATA, READ, DISCARD |
| .rsrc | 0x0518 | 0x1000 | 1.31 | IDATA, READ, DISCARD |
| .reloc | 0x1878 | 0x2000 | 4.99 | 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 | Disable/Modify Tools | Defense Evasion |
| T1562.006 | Indicator Blocking | Defense Evasion |
| T1564.001 | Hidden Files and Directories | Defense Evasion |
| T1569.002 | Service Execution | Execution |
| T1652 | Device Driver Discovery | Discovery |
| Signer | Microsoft Windows |
|---|---|
| Signer organisation | Microsoft Corporation |
| Issuer | Microsoft Windows Production PCA 2011 |
| Serial | 330000045FF3C96C1A7FF7DA1D00000000045F |
| Valid from | 2023-11-16 19:20 UTC |
| Valid until | 2024-11-14 19:20 UTC (expired) |
| Signature validity | Not verified |
Engine angr, status static_approximation, 0 paths explored at a maximum depth of 0. Vulnerability classes reached: 0. Exploitable paths: 0.
Based on DriverShield static and dynamic analysis, AppvVemgr.sys is flagged as vulnerable and is a potential Bring Your Own Vulnerable Driver (BYOVD) risk. Its composite risk score is 60/100 (verdict: vulnerable). Always validate findings independently before acting.
AppvVemgr.sys has a DriverShield composite risk score of 60/100, placing it in the vulnerable verdict band. SHA256: c8bcd77030f948a6287adda728fcba6b4297dec9fe6a05cdeccef624075c8ae1.
AppvVemgr.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