vwifibus.sys - Clean (10/100) - DriverShield Analysis

Analysis of vwifibus.sys: clean verdict, risk score 10/100. 0 YARA matches. SHA256 373c85f659f07366. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

vwifibus.sys - Analysis Report

DriverShield analyzed the Windows kernel driver vwifibus.sys and assigned a verdict of Clean with a composite risk score of 10/100, indicating no notable risk signals (0-29 band).

Verdict	Clean (10/100)
YARA matches	0
File size	29184 bytes
Analyzed	2026-03-22
SHA256	373c85f659f07366649697823b4a8b14313f0042a7a04e932429d049d18c7646
SHA1	c3fae20c4865514633590ee68f4f8df285789897
MD5	7bc30adccc9bcf2b0a29a320a395ec3b

Driver identity

Version resource data embedded in the vwifibus.sys PE header, as extracted by the analysis engine.

File description	Virtual Wireless Bus Driver
Product	Microsoft® Windows® Operating System
Company	Microsoft Corporation
Original filename	VWiFiBus.sys
Internal name	VWiFiBus.sys
File version	10.0.19041.1 (WinBuild.160101.0800)
Copyright	© Microsoft Corporation. All rights reserved.

How the 10/100 score breaks down

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	30 / 100
IOCTL dispatch surface	18 / 100
Known-vulnerable corpus	0 / 100
Code-signing state	50 / 100
Packing and entropy	0 / 100
Dynamic behaviour	0 / 100
CVE cross-reference	0 / 100

Kernel imports (6)

Kernel-mode APIs resolved from the Import Address Table of vwifibus.sys, ranked by exploitation relevance.

API	Risk	Why it matters
MmGetSystemRoutineAddress	high	Potentially dangerous - could be used for privilege escalation or security bypass
RtlInitUnicodeString	low	Standard kernel API - generally benign
ExAllocatePoolWithTag	low	Standard kernel API - generally benign
ZwQueryValueKey	low	Standard kernel API - generally benign
DbgPrintEx	low	Standard kernel API - generally benign
ZwClose	low	Standard kernel API - generally benign

IOCTL dispatch codes (6)

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
0x0022A3E8	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #2298
0x0034FB0D	medium	METHOD_IN_DIRECT	FILE_DEVICE_DISK Function #3779
0x0034AF0D	medium	METHOD_IN_DIRECT	FILE_DEVICE_DISK Function #3011
0x0034430D	medium	METHOD_IN_DIRECT	FILE_DEVICE_DISK Function #195
0x0034039C	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #231

PE sections

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	0x2AEA	0x2C00	6.17	CODE, EXEC, READ
.rdata	0x0DC8	0x0E00	5.17	IDATA, READ
.data	0x0450	0x0200	0.95	IDATA, READ, WRITE
.pdata	0x02DC	0x0400	3.16	IDATA, READ
.idata	0x033C	0x0400	3.61	IDATA, READ
PAGE	0x1834	0x1A00	5.88	CODE, EXEC, READ
INIT	0x01D6	0x0200	5.59	CODE, EXEC, READ, DISCARD
GFIDS	0x0054	0x0200	0.77	IDATA, READ, DISCARD
.rsrc	0x0620	0x0800	2.66	IDATA, READ, DISCARD
.reloc	0x0234	0x0400	3.38	IDATA, READ, DISCARD

Exploit mitigations

Control Flow Guard	Enabled
ASLR	Enabled
DEP	Enabled
Integrity check	Not enforced
Mitigation score	80 / 100

CFG Enabled - Control Flow Guard is active - indirect calls are validated against a bitmap of valid targets at runtime.
ASLR Enabled - Address Space Layout Randomization is active - base address is randomized on each load.
DEP/NX Enabled - Data Execution Prevention is active - non-executable pages cannot be executed.
Unsigned - The driver is not digitally signed. It requires test signing mode or a bootloader exploit to load on 64-bit Windows.

MITRE ATT&CK techniques (5)

Techniques this driver could enable if loaded by an adversary.

ID	Technique	Tactic
T1211	Exploitation for Defense Evasion	Defense Evasion
T1543.003	Windows Service	Persistence
T1553.002	Subvert Trust Controls: Code Signing	Defense Evasion
T1553.006	Code Signing Policy Modification	Defense Evasion
T1652	Device Driver Discovery	Discovery

Symbolic execution

Engine angr, status no_findings, 0 paths explored at a maximum depth of 0. Vulnerability classes reached: 0. Exploitable paths: 0.

Frequently asked questions about vwifibus.sys

Is vwifibus.sys safe?

Based on DriverShield static and dynamic analysis, vwifibus.sys is assessed as clean, with no notable risk signals. Its composite risk score is 10/100 (verdict: clean). Always validate findings independently before acting.

What is the risk score of vwifibus.sys?

vwifibus.sys has a DriverShield composite risk score of 10/100, placing it in the clean verdict band. SHA256: 373c85f659f07366649697823b4a8b14313f0042a7a04e932429d049d18c7646.

What is vwifibus.sys?

vwifibus.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators.