Analysis of mullvad-wireguard.sys: clean verdict, risk score 29/100. 0 YARA matches, 0/75 multi-engine detections. SHA256 b5e93448402608dc. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver mullvad-wireguard.sys and assigned a verdict of Clean with a composite risk score of 29/100, indicating no notable risk signals (0-29 band).
| Verdict | Clean (29/100) |
| YARA matches | 0 |
| Multi-engine detections | 0 / 75 |
| File size | 571912 bytes |
| Code-signing signer | DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1 |
| Analyzed | 2026-05-03 |
| SHA256 | b5e93448402608dc86d85068c1f9e9113f49622900c9d57a92a8e2e36f656ec7 |
| SHA1 | 9a253583ef161e48027aa98471f704062c0991e4 |
| MD5 | 9b9d92f070a1d781d3dbd5ea9904936c |
Version resource data embedded in the mullvad-wireguard.sys PE header, as extracted by the analysis engine.
| File description | WireGuard Driver |
|---|---|
| Product | WireGuard Driver |
| Company | WireGuard LLC |
| Original filename | mullvad-wireguard.sys |
| Internal name | mullvad-wireguard.sys |
| File version | 0.10.1 |
| Copyright | Copyright © 2015-2021 WireGuard LLC. 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 | 0 / 100 |
| Dangerous kernel imports | 87 / 100 |
| IOCTL dispatch surface | 100 / 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 mullvad-wireguard.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapLockedPagesSpecifyCache | 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 |
| ObReferenceObjectByHandle | medium | Moderate risk - system modification capability |
| NtQuerySystemInformation | medium | Moderate risk - system modification capability |
| KeInitializeEvent | low | Standard kernel API - generally benign |
| KeSetEvent | low | Standard kernel API - generally benign |
| SeAccessCheck | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| KeWaitForSingleObject | low | Standard kernel API - generally benign |
| ZwClose | 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 |
|---|---|---|---|
| 0x0080A77F | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #2527 |
| 0x00808B7F | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #735 |
| 0x00808B6F | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #731 |
| 0x0080858B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #354 |
| 0x003441C7 | high | METHOD_NEITHER | FILE_DEVICE_DISK Function #113 |
| 0x00808B3B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #718 |
| 0x0080FFFF | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #4095 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x0080B68D | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3491 |
| 0x0080EA81 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #2720 |
| 0x0080BF8D | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #4067 |
| 0x0080B8C9 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3634 |
| 0x0080249C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2343 |
| 0x0080B901 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3648 |
| 0x00348D41 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #848 |
| 0x00348D45 | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #849 |
| 0x0080BD89 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3938 |
| 0x00809D89 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #1890 |
| 0x0080858D | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #355 |
| 0x008024B4 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2349 |
| 0x0080248C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2339 |
| 0x008024AC | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2347 |
| 0x00802484 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2337 |
| 0x00808511 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #324 |
Showing 24 of 40 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 | 0x1FD8C | 0x1FE00 | 6.56 | CODE, EXEC, READ |
| .rdata | 0x12B34 | 0x12C00 | 1.03 | IDATA, READ |
| .data | 0x204EC | 0x0200 | 1.63 | IDATA, READ, WRITE |
| .pdata | 0x114C | 0x1200 | 5.3 | IDATA, READ |
| INIT | 0x2086 | 0x2200 | 6.17 | CODE, EXEC, READ, DISCARD |
| .rsrc | 0x501F8 | 0x50200 | 3.83 | IDATA, READ, DISCARD |
| .reloc | 0x0020 | 0x0200 | 0.4 | IDATA, READ, DISCARD |
| Control Flow Guard | Enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Not enforced |
| Mitigation score | 100 / 100 |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1003.001 | OS Credential Dumping: LSASS Memory | Credential Access |
| T1055.012 | Process Hollowing | Defense Evasion |
| T1068 | Exploitation for Privilege Escalation | Privilege Escalation |
| T1071 | Application Layer Protocol | Command and Control |
| T1211 | Exploitation for Defense Evasion | Defense Evasion |
| T1543.003 | Windows Service | Persistence |
| T1553.002 | Subvert Trust Controls: Code Signing | Defense Evasion |
| T1569.002 | System Services: Service Execution | Execution |
| T1652 | Device Driver Discovery | Discovery |
| Signer | DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1 |
|---|---|
| Signer organisation | DigiCert, Inc. |
| Issuer | DigiCert Trusted Root G4 |
| Serial | 8AD40B260D29C4C9F5ECDA9BD93AED9 |
| Valid from | 2021-04-29 00:00 UTC |
| Valid until | 2036-04-28 23:59 UTC |
| Signature validity | Verified |
Engine angr, status static_approximation, 0 paths explored at a maximum depth of 0. Vulnerability classes reached: 0. Exploitable paths: 2.
Based on DriverShield static and dynamic analysis, mullvad-wireguard.sys is assessed as clean, with no notable risk signals. Its composite risk score is 29/100 (verdict: clean). Always validate findings independently before acting.
mullvad-wireguard.sys has a DriverShield composite risk score of 29/100, placing it in the clean verdict band. SHA256: b5e93448402608dc86d85068c1f9e9113f49622900c9d57a92a8e2e36f656ec7.
mullvad-wireguard.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators. It is code-signed by DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1.
Related: Other drivers signed by DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1 · What an IOCTL dispatch code is · BYOVD research index · full driver database · CVE library · code signing atlas