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

Analysis of wacompen.sys: clean verdict, risk score 10/100. 0 YARA matches, 0/76 multi-engine detections. SHA256 55c5747ecd53113a. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

wacompen.sys - Analysis Report

DriverShield analyzed the Windows kernel driver wacompen.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
Multi-engine detections	0 / 76
File size	65536 bytes
Analyzed	2026-03-23
SHA256	55c5747ecd53113af450aa0b5055a8d0962b6ab1ff8b5431630e60b27e025a36
SHA1	8930ca1afd5ce3962d4d9bcadd1b853bd1b08014
MD5	ab15c28ad63c810459a84340f13ec77f

Driver identity

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

File description	Wacom Serial Pen Tablet HID Driver
Product	Microsoft® Windows® Operating System
Company	Microsoft Corporation
Original filename	wacompen.sys
Internal name	wacompen.sys
File version	10.0.26100.1150 (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	24 / 100
IOCTL dispatch surface	21 / 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 (13)

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

API	Risk	Why it matters
MmGetSystemRoutineAddress	high	Potentially dangerous - could be used for privilege escalation or security bypass
ZwSetValueKey	medium	Moderate risk - system modification capability
ZwClose	low	Standard kernel API - generally benign
ZwQueryValueKey	low	Standard kernel API - generally benign
KeSetEvent	low	Standard kernel API - generally benign
ExFreePool	low	Standard kernel API - generally benign
KeDelayExecutionThread	low	Standard kernel API - generally benign
IoBuildDeviceIoControlRequest	low	Standard kernel API - generally benign
KeInitializeEvent	low	Standard kernel API - generally benign
IofCompleteRequest	low	Standard kernel API - generally benign
RtlInitUnicodeString	low	Standard kernel API - generally benign
ExAllocatePool2	low	Standard kernel API - generally benign
KeWaitForSingleObject	low	Standard kernel API - generally benign

IOCTL dispatch codes (7)

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
0x00220113	high	METHOD_NEITHER	FILE_DEVICE_UNKNOWN Function #68
0x002200F0	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #60
0x0080C481	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #288
0x00340056	medium	METHOD_OUT_DIRECT	FILE_DEVICE_DISK Function #21
0x00800078	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #30
0x0080EC81	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #2848
0x003403B8	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #238

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	0x2477	0x3000	5.13	CODE, EXEC, READ
fothk	0x1000	0x1000	0.03	CODE, EXEC, READ
.rdata	0x09F4	0x1000	3.2	IDATA, READ
.data	0x0240	0x1000	0.47	IDATA, READ, WRITE
.pdata	0x0360	0x1000	1.16	IDATA, READ
.idata	0x0606	0x1000	2.02	IDATA, READ
PAGE	0x2856	0x3000	5.64	CODE, EXEC, READ
INIT	0x01F2	0x1000	1.13	CODE, EXEC, READ, DISCARD
GFIDS	0x005C	0x1000	0.13	IDATA, READ, DISCARD
.rsrc	0x0E00	0x1000	3.12	IDATA, READ, DISCARD
.reloc	0x0338	0x1000	1.18	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 completed, 49 paths explored at a maximum depth of 49. Vulnerability classes reached: 0. Exploitable paths: 1.

Frequently asked questions about wacompen.sys

Is wacompen.sys safe?

Based on DriverShield static and dynamic analysis, wacompen.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 wacompen.sys?

wacompen.sys has a DriverShield composite risk score of 10/100, placing it in the clean verdict band. SHA256: 55c5747ecd53113af450aa0b5055a8d0962b6ab1ff8b5431630e60b27e025a36.

What is wacompen.sys?

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