lsi_sas3i.sys - Clean (11/100) - DriverShield Analysis

Analysis of lsi_sas3i.sys: clean verdict, risk score 11/100. 0 YARA matches, 0/75 multi-engine detections. SHA256 aa3f0407e20a2d7e. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

lsi_sas3i.sys - Analysis Report

DriverShield analyzed the Windows kernel driver lsi_sas3i.sys and assigned a verdict of Clean with a composite risk score of 11/100, indicating no notable risk signals (0-29 band).

Verdict	Clean (11/100)
YARA matches	0
Multi-engine detections	0 / 75
File size	138560 bytes
Code-signing signer	Microsoft Windows
Analyzed	2026-10-11
SHA256	aa3f0407e20a2d7e90d412f4325fb0d7124f12eec4215cd32a7df9aa5322d135
SHA1	e64738700449d626e1c6b82b992bad3ab4ec0427
MD5	73eaec8fd74e2b73105dcdadbb14b151

Driver identity

Version resource data embedded in the lsi_sas3i.sys PE header, as extracted by the analysis engine.

File description	Avago SAS Gen3 Driver (StorPort)
Product	Windows (R) Win 7 DDK driver
Company	Avago Technologies
Original filename	LSI_SAS3i.SYS
Internal name	LSI_SAS3i-2.51.27.80 (NT4)
File version	2.51.27.80
Copyright	Copyright © Avago Technologies 2015

How the 11/100 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	57 / 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

IOCTL dispatch codes (19)

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
0x0080840F	high	METHOD_NEITHER	FILE_DEVICE_CUSTOM Function #259
0x0080850F	high	METHOD_NEITHER	FILE_DEVICE_CUSTOM Function #323
0x00343417	high	METHOD_NEITHER	FILE_DEVICE_DISK Function #3333
0x002200F0	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #60
0x00802494	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2341
0x00802484	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2337
0x0080BD41	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #3920
0x008024BC	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2351
0x0080BB41	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #3792
0x0080E92E	medium	METHOD_OUT_DIRECT	FILE_DEVICE_CUSTOM Function #2635
0x008024AC	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2347
0x0080B80C	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #3587
0x9C40B841	medium	METHOD_IN_DIRECT	CUSTOM_LENOVO Function #3600
0x0034B800	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #3584
0x002293E8	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #1274
0x00345BE8	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #1786
0x0080248C	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2339
0x00340374	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #221
0x00340038	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #14

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	0x1B259	0x1B400	6.39	CODE, EXEC, READ
.rdata	0x1D68	0x1E00	5.1	IDATA, READ
.data	0x02C0	0x0400	2.92	IDATA, READ, WRITE
.pdata	0x0F3C	0x1000	4.97	IDATA, READ
INIT	0x0324	0x0400	4.14	CODE, EXEC, READ, DISCARD
.rsrc	0x0780	0x0800	5.28	IDATA, READ, DISCARD
.reloc	0x0024	0x0200	0.49	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 (3)

Techniques this driver could enable if loaded by an adversary.

ID	Technique	Tactic
T1071	Application Layer Protocol	Command and Control
T1543.003	Windows Service	Persistence
T1652	Device Driver Discovery	Discovery

Code-signing chain

Signer	Microsoft Windows
Signer organisation	Microsoft Corporation
Issuer	Microsoft Windows Production PCA 2011
Serial	330000045FF3C96C1A7FF7DA1D00000000045F
Valid from	2023-11-16 19:20 UTC
Valid until	2024-11-14 19:20 UTC (expired)
Signature validity	Not verified

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

Symbolic execution

Engine angr, status completed, 13 paths explored at a maximum depth of 13. Vulnerability classes reached: 0. Exploitable paths: 0.

Frequently asked questions about lsi_sas3i.sys

Is lsi_sas3i.sys safe?

Based on DriverShield static and dynamic analysis, lsi_sas3i.sys is assessed as clean, with no notable risk signals. Its composite risk score is 11/100 (verdict: clean). Always validate findings independently before acting.

What is the risk score of lsi_sas3i.sys?

lsi_sas3i.sys has a DriverShield composite risk score of 11/100, placing it in the clean verdict band. SHA256: aa3f0407e20a2d7e90d412f4325fb0d7124f12eec4215cd32a7df9aa5322d135.

What is lsi_sas3i.sys?

lsi_sas3i.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