rootmdm.sys - Clean (15/100) - DriverShield Analysis

Analysis of rootmdm.sys: clean verdict, risk score 15/100. 0 YARA matches. SHA256 b64aa15cbfffd710. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

rootmdm.sys - Analysis Report

DriverShield analyzed the Windows kernel driver rootmdm.sys and assigned a verdict of Clean with a composite risk score of 15/100, indicating no notable risk signals (0-29 band).

Verdict	Clean (15/100)
YARA matches	0
File size	13824 bytes
Analyzed	2026-03-22
SHA256	b64aa15cbfffd7106fefc05df462140f17b193babe6879417023e03dd92abf2d
SHA1	d563c017e058ad8edca175bb8e8d2ac9b50172c7
MD5	678581815b54ee96b0c7c71df92a0190

Driver identity

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

File description	Legacy Non-Pnp Modem Device Driver
Product	Microsoft® Windows® Operating System
Company	Microsoft Corporation
Original filename	ROOTMDM.SYS
Internal name	ROOTMDM.SYS
File version	10.0.19041.1 (WinBuild.160101.0800)
Copyright	© Microsoft Corporation. All rights reserved.

How the 15/100 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	54 / 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 (12)

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

API	Risk	Why it matters
MmGetSystemRoutineAddress	high	Potentially dangerous - could be used for privilege escalation or security bypass
IoGetDeviceObjectPointer	medium	Moderate risk - system modification capability
ZwClose	low	Standard kernel API - generally benign
IofCompleteRequest	low	Standard kernel API - generally benign
RtlInitUnicodeString	low	Standard kernel API - generally benign
ExAllocatePoolWithTag	low	Standard kernel API - generally benign
IoDeleteDevice	low	Standard kernel API - generally benign
KeWaitForSingleObject	low	Standard kernel API - generally benign
KeInitializeEvent	low	Standard kernel API - generally benign
KeSetEvent	low	Standard kernel API - generally benign
IoCreateDevice	low	Standard kernel API - generally benign
IoBuildDeviceIoControlRequest	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
0x0022E8CF	high	METHOD_NEITHER	FILE_DEVICE_UNKNOWN Function #2611
0x00346383	high	METHOD_NEITHER	FILE_DEVICE_DISK Function #2272
0x00347B83	high	METHOD_NEITHER	FILE_DEVICE_DISK Function #3808
0x002200F0	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #60
0x00220114	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #69
0x00802024	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2057
0x003403A4	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #233

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	0x06E9	0x0800	5.2	CODE, EXEC, READ
.rdata	0x0508	0x0600	3.4	IDATA, READ
.data	0x0098	0x0200	0.28	IDATA, READ, WRITE
.pdata	0x012C	0x0200	2.41	IDATA, READ
.idata	0x0562	0x0600	4.07	IDATA, READ
PAGE	0x0A4B	0x0C00	5.32	CODE, EXEC, READ
INIT	0x0282	0x0400	4.21	CODE, EXEC, READ, DISCARD
GFIDS	0x0030	0x0200	0.44	IDATA, READ, DISCARD
.rsrc	0x0418	0x0600	2.48	IDATA, READ, DISCARD
.reloc	0x0184	0x0200	3.59	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 (6)

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
T1569.002	System Services: Service Execution	Execution
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 rootmdm.sys

Is rootmdm.sys safe?

Based on DriverShield static and dynamic analysis, rootmdm.sys is assessed as clean, with no notable risk signals. Its composite risk score is 15/100 (verdict: clean). Always validate findings independently before acting.

What is the risk score of rootmdm.sys?

rootmdm.sys has a DriverShield composite risk score of 15/100, placing it in the clean verdict band. SHA256: b64aa15cbfffd7106fefc05df462140f17b193babe6879417023e03dd92abf2d.

What is rootmdm.sys?

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