dmvsc.sys - Clean (25/100) - DriverShield Analysis

Analysis of dmvsc.sys: clean verdict, risk score 25/100. 0 YARA matches. SHA256 6604dc0e7607e46b. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

dmvsc.sys - Analysis Report

DriverShield analyzed the Windows kernel driver dmvsc.sys and assigned a verdict of Clean with a composite risk score of 25/100, indicating no notable risk signals (0-29 band).

Verdict	Clean (25/100)
YARA matches	0
File size	59192 bytes
Code-signing signer	Microsoft Windows
Analyzed	2026-03-22
SHA256	6604dc0e7607e46b83f1239934646ac4adf5ca4cc463fb9df521b243f434579b
SHA1	ff1f0d025c9457eaa767d91d90cc74a083953c7e
MD5	48aa813aaa7e347cd7d6d56fe32144c6

Driver identity

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

File description	Dynamic Memory
Product	Microsoft® Windows® Operating System
Company	Microsoft Corporation
Original filename	dmvsc.sys
Internal name	dmvsc.sys
File version	10.0.19041.1 (WinBuild.160101.0800)
Copyright	© Microsoft Corporation. All rights reserved.

How the 25/100 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	87 / 100
IOCTL dispatch surface	42 / 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 imports (11)

Kernel-mode APIs resolved from the Import Address Table of dmvsc.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
ExAllocatePoolWithTag	low	Standard kernel API - generally benign
KeSetEvent	low	Standard kernel API - generally benign
RtlInitUnicodeString	low	Standard kernel API - generally benign
KeWaitForSingleObject	low	Standard kernel API - generally benign
KeInitializeEvent	low	Standard kernel API - generally benign
ZwClose	low	Standard kernel API - generally benign
DbgPrintEx	low	Standard kernel API - generally benign

IOCTL dispatch codes (14)

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
0x00808B2B	high	METHOD_NEITHER	FILE_DEVICE_CUSTOM Function #714
0x00808B8B	high	METHOD_NEITHER	FILE_DEVICE_CUSTOM Function #738
0x0022741B	high	METHOD_NEITHER	FILE_DEVICE_UNKNOWN Function #3334
0x0080820F	high	METHOD_NEITHER	FILE_DEVICE_CUSTOM Function #131
0x002200F0	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #60
0x00802715	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #2501
0x00809B15	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #1733
0x0022BA18	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #3718
0x008024B4	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2349
0x00802484	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2337
0x0080248C	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2339
0x00228B05	medium	METHOD_IN_DIRECT	FILE_DEVICE_UNKNOWN Function #705
0x00340036	medium	METHOD_OUT_DIRECT	FILE_DEVICE_DISK Function #13
0x00340374	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #221

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	0x1D69	0x1E00	6.13	CODE, EXEC, READ
NONPAGED	0x307D	0x3200	6.1	CODE, EXEC, READ
.rdata	0x1328	0x1400	4.93	IDATA, READ
.data	0x04C8	0x0200	1.47	IDATA, READ, WRITE
.pdata	0x0474	0x0600	3.4	IDATA, READ
.idata	0x0A42	0x0C00	4.09	IDATA, READ
PAGE	0x1BB9	0x1C00	6.12	CODE, EXEC, READ
INIT	0x01B6	0x0200	5.37	CODE, EXEC, READ, DISCARD
GFIDS	0x005C	0x0200	0.83	IDATA, READ, DISCARD
.rsrc	0x24A0	0x2600	3.58	IDATA, READ, DISCARD
.reloc	0x033C	0x0400	4.73	IDATA, READ, DISCARD

Exploit mitigations

Control Flow Guard	Enabled
ASLR	Enabled
DEP	Enabled
Integrity check	Not enforced
Mitigation score	85 / 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.
Expired Certificate - The driver is signed but the certificate has expired. Windows may still load it depending on revocation policy.

MITRE ATT&CK techniques (9)

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

Code-signing chain

Signer	Microsoft Windows
Signer organisation	Microsoft Corporation
Issuer	Microsoft Windows Production PCA 2011
Serial	330000023241FB59996DCC4DFF000000000232
Valid from	2019-05-02 21:24 UTC
Valid until	2020-05-02 21:24 UTC (expired)
Signature validity	Not verified

Certificate revision: 0x0200
Certificate type: PKCS#7
Chain: Microsoft Windows Production PCA 2011

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 dmvsc.sys

Is dmvsc.sys safe?

Based on DriverShield static and dynamic analysis, dmvsc.sys is assessed as clean, with no notable risk signals. Its composite risk score is 25/100 (verdict: clean). Always validate findings independently before acting.

What is the risk score of dmvsc.sys?

dmvsc.sys has a DriverShield composite risk score of 25/100, placing it in the clean verdict band. SHA256: 6604dc0e7607e46b83f1239934646ac4adf5ca4cc463fb9df521b243f434579b.

What is dmvsc.sys?

dmvsc.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 · BYOVD research index · full driver database · CVE library · code signing atlas