Dmpusbstor.sys - Clean (4/100) - DriverShield Analysis

Analysis of Dmpusbstor.sys: clean verdict, risk score 4/100. 0 YARA matches. SHA256 0e39d393c03e119c. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

Dmpusbstor.sys - Analysis Report

DriverShield analyzed the Windows kernel driver Dmpusbstor.sys and assigned a verdict of Clean with a composite risk score of 4/100, indicating no notable risk signals (0-29 band).

Verdict	Clean (4/100)
YARA matches	0
File size	20480 bytes
Analyzed	2026-03-22
SHA256	0e39d393c03e119cd88e8e8939a926e92c60823a5c1ef3a3aa83e48261f99dad
SHA1	0134d383f05b62ac27f7f3e24589495e42c5b56c
MD5	7d5787caa487fc66b06a4403f3722230

Driver identity

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

File description	Boot Over USB Dump Driver
Product	Microsoft® Windows® Operating System
Company	Microsoft Corporation
Original filename	dmpusbstor.sys
Internal name	dmpusbstor.sys
File version	10.0.19041.4355 (WinBuild.160101.0800)
Copyright	© Microsoft Corporation. All rights reserved.

How the 4/100 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	0 / 100
IOCTL dispatch surface	15 / 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 (1)

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

API	Risk	Why it matters
KeBugCheckEx	medium	Moderate risk - system modification capability

IOCTL dispatch codes (5)

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
0x00802484	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2337
0x00220112	medium	METHOD_OUT_DIRECT	FILE_DEVICE_UNKNOWN Function #68
0x003403AC	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #235
0x0034002E	medium	METHOD_OUT_DIRECT	FILE_DEVICE_DISK Function #11

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	0x2135	0x2200	5.29	CODE, EXEC, READ
.rdata	0x05E8	0x0600	3.88	IDATA, READ
.data	0x00A0	0x0200	0.28	IDATA, READ, WRITE
.pdata	0x02C4	0x0400	2.95	IDATA, READ
.idata	0x0272	0x0400	2.83	IDATA, READ
PAGE	0x0964	0x0A00	5.17	CODE, EXEC, READ
.edata	0x006E	0x0200	1.26	IDATA, READ
INIT	0x02C2	0x0400	4.24	CODE, EXEC, READ, DISCARD
GFIDS	0x0050	0x0200	0.61	IDATA, READ, DISCARD
.rsrc	0x0410	0x0600	2.51	IDATA, READ, DISCARD
.reloc	0x00D0	0x0200	1.55	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 (3)

Techniques this driver could enable if loaded by an adversary.

ID	Technique	Tactic
T1543.003	Windows Service	Persistence
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 Dmpusbstor.sys

Is Dmpusbstor.sys safe?

Based on DriverShield static and dynamic analysis, Dmpusbstor.sys is assessed as clean, with no notable risk signals. Its composite risk score is 4/100 (verdict: clean). Always validate findings independently before acting.

What is the risk score of Dmpusbstor.sys?

Dmpusbstor.sys has a DriverShield composite risk score of 4/100, placing it in the clean verdict band. SHA256: 0e39d393c03e119cd88e8e8939a926e92c60823a5c1ef3a3aa83e48261f99dad.

What is Dmpusbstor.sys?

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