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

Analysis of sfloppy.sys: clean verdict, risk score 10/100. 0 YARA matches. SHA256 63881202d6d90065. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

sfloppy.sys - Analysis Report

DriverShield analyzed the Windows kernel driver sfloppy.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	19456 bytes
Analyzed	2026-03-22
SHA256	63881202d6d900656f50a0e40cb743d0769c2ad9810fe96387e9daf2bc89e4c5
SHA1	6da9aa4e0d1085fc5c3bb25ac4367221f76b5474
MD5	ad1b790a42984a825068b849a88ad322

Driver identity

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

File description	SCSI Floppy Driver
Product	Microsoft® Windows® Operating System
Company	Microsoft Corporation
Original filename	sfloppy.sys
Internal name	sfloppy.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	39 / 100
IOCTL dispatch surface	6 / 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 (7)

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

API	Risk	Why it matters
KeWaitForSingleObject	low	Standard kernel API - generally benign
IoCreateSymbolicLink	low	Standard kernel API - generally benign
IoBuildDeviceIoControlRequest	low	Standard kernel API - generally benign
KeInitializeEvent	low	Standard kernel API - generally benign
ExAllocatePoolWithTag	low	Standard kernel API - generally benign
IoDeleteDevice	low	Standard kernel API - generally benign
RtlInitUnicodeString	low	Standard kernel API - generally benign

IOCTL dispatch codes (2)

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
0x00340384	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #225

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	0x0F69	0x1000	5.97	CODE, EXEC, READ
.rdata	0x0640	0x0800	3.74	IDATA, READ
.data	0x0380	0x0400	1.93	IDATA, READ, WRITE
.pdata	0x015C	0x0200	2.86	IDATA, READ
.idata	0x06C0	0x0800	3.95	IDATA, READ
PAGE	0x152F	0x1600	6.15	CODE, EXEC, READ
INIT	0x0172	0x0200	4.5	CODE, EXEC, READ, DISCARD
GFIDS	0x0030	0x0200	0.45	IDATA, READ, DISCARD
.rsrc	0x03F8	0x0400	3.27	IDATA, READ, DISCARD
.reloc	0x0210	0x0400	3.03	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	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 sfloppy.sys

Is sfloppy.sys safe?

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

sfloppy.sys has a DriverShield composite risk score of 10/100, placing it in the clean verdict band. SHA256: 63881202d6d900656f50a0e40cb743d0769c2ad9810fe96387e9daf2bc89e4c5.

What is sfloppy.sys?

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