_LSTR_37_nep.sra_10_0.sys - Vulnerable (72/100) - DriverShield Analysis

Analysis of _LSTR_37_nep.sra_10_0.sys: vulnerable verdict, risk score 72/100. 2 YARA matches, 0/76 multi-engine detections. SHA256 87e791e95d65f3f6. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

_LSTR_37_nep.sra_10_0.sys - Analysis Report

DriverShield analyzed the Windows kernel driver _LSTR_37_nep.sra_10_0.sys and assigned a verdict of Vulnerable with a composite risk score of 72/100, indicating a known or likely vulnerability surface (60-79 band).

Verdict	Vulnerable (72/100)
YARA matches	2
Multi-engine detections	0 / 76
File size	174840 bytes
Code-signing signer	Microsoft Windows Hardware Compatibility Publisher
Analyzed	2026-08-05
SHA256	87e791e95d65f3f6f1f5fd1d62309030822dac3c3d124da820bc692566e84b48
SHA1	fca9523c0899ea7e273bca1c5dd3ef5bfb4ca8b7
MD5	76a57e4861db36240f4e1c0fc84bbd42

Driver identity

Version resource data embedded in the _LSTR_37_nep.sra_10_0.sys PE header, as extracted by the analysis engine.

Product	Stormshield Endpoint Security
Company	Stormshield
File version	7.2.32.1
Copyright	Stormshield - All rights reserved

How the 72/100 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	80 / 100
Dangerous kernel imports	100 / 100
IOCTL dispatch surface	72 / 100
Known-vulnerable corpus	0 / 100
Code-signing state	80 / 100
Packing and entropy	80 / 100
Dynamic behaviour	0 / 100
CVE cross-reference	0 / 100

Kernel imports (25)

Kernel-mode APIs resolved from the Import Address Table of _LSTR_37_nep.sra_10_0.sys, ranked by exploitation relevance.

API	Risk	Why it matters
MmMapLockedPagesSpecifyCache	critical	Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination
MmMapIoSpace	critical	Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination
MmAllocateContiguousMemory	high	Potentially dangerous - could be used for privilege escalation or security bypass
MmGetSystemRoutineAddress	high	Potentially dangerous - could be used for privilege escalation or security bypass
PsSetLoadImageNotifyRoutine	medium	Moderate risk - system modification capability
KeBugCheckEx	medium	Moderate risk - system modification capability
MmUnmapIoSpace	medium	Moderate risk - system modification capability
ZwSetValueKey	medium	Moderate risk - system modification capability
ZwDeleteKey	medium	Moderate risk - system modification capability
ZwCreateKey	medium	Moderate risk - system modification capability
ObReferenceObjectByHandle	medium	Moderate risk - system modification capability
IofCompleteRequest	low	Standard kernel API - generally benign
IoDeleteDevice	low	Standard kernel API - generally benign
IoCreateSymbolicLink	low	Standard kernel API - generally benign
KeDelayExecutionThread	low	Standard kernel API - generally benign
ExAllocatePoolWithTag	low	Standard kernel API - generally benign
ZwOpenKey	low	Standard kernel API - generally benign
ZwQueryValueKey	low	Standard kernel API - generally benign
KeInitializeEvent	low	Standard kernel API - generally benign
KeWaitForSingleObject	low	Standard kernel API - generally benign
RtlInitUnicodeString	low	Standard kernel API - generally benign
ZwClose	low	Standard kernel API - generally benign
KeSetEvent	low	Standard kernel API - generally benign
IoDeleteSymbolicLink	low	Standard kernel API - generally benign
IoCreateDevice	low	Standard kernel API - generally benign

IOCTL dispatch codes (24)

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
0x00808B8B	high	METHOD_NEITHER	FILE_DEVICE_CUSTOM Function #738
0x0080BB83	high	METHOD_NEITHER	FILE_DEVICE_CUSTOM Function #3808
0x002200F0	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #60
0x00809B8D	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #1763
0x008024BC	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2351
0x0080BB01	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #3776
0x003437E8	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #3578
0x0080248C	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2339
0x00808F10	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #964
0x008024A4	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2345
0x0080B389	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #3298
0x008024B4	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2349
0x0080FE81	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #4000
0x00802984	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2657
0x0080C481	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #288
0x002203E8	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #250
0x0080249C	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2343
0x00803DFE	medium	METHOD_OUT_DIRECT	FILE_DEVICE_CUSTOM Function #3967
0x0080B841	medium	METHOD_IN_DIRECT	FILE_DEVICE_CUSTOM Function #3600
0x00343412	medium	METHOD_OUT_DIRECT	FILE_DEVICE_DISK Function #3332
0x0022010D	medium	METHOD_IN_DIRECT	FILE_DEVICE_UNKNOWN Function #67
0x00220118	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #70
0x00340244	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #145
0x00220068	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #26

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	0x140FC	0x14200	6.32	CODE, EXEC, READ
.fips	0x70A3	0x7200	6.3	CODE, EXEC, READ
.rdata	0x75BC	0x7600	7.45	IDATA, READ
.data	0x08A1	0x0400	1.63	IDATA, READ, WRITE
.pdata	0x1674	0x1800	5.05	IDATA, READ
PAGE	0x064C	0x0800	5.2	CODE, EXEC, READ
INIT	0x0A36	0x0C00	4.82	CODE, EXEC, READ, DISCARD
.rsrc	0x02A8	0x0400	2.27	IDATA, READ, DISCARD
.reloc	0x00B0	0x0200	2.12	IDATA, READ, DISCARD

Exploit mitigations

Control Flow Guard	Not enabled
ASLR	Enabled
DEP	Enabled
Integrity check	Not enforced
Mitigation score	55 / 100

• No CFG - Control Flow Guard is not enabled. Indirect call targets are not validated, making the driver susceptible to control flow hijacking via corrupted function pointers or vtables.
• 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.
• Packed Section: .rdata - Section has entropy 7.45 (threshold: 7.0), indicating possible packing or encrypted content.

YARA rule matches (2)

Rule	Severity	Detects
BYOVD_MemRW	critical	Phys memory mapping + device creation
SUSP_PhysMem	high	Physical memory mapping

MITRE ATT&CK techniques (14)

Techniques this driver could enable if loaded by an adversary.

ID	Technique	Tactic
T1003	OS Credential Dumping	Credential Access
T1003.001	OS Credential Dumping: LSASS Memory	Credential Access
T1006	Direct Volume Access	Defense Evasion
T1014	Rootkit	Defense Evasion
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
T1562.006	Indicator Blocking	Defense Evasion
T1564.001	Hidden Files and Directories	Defense Evasion
T1569.002	Service Execution	Execution
T1652	Device Driver Discovery	Discovery

Code-signing chain

Signer	Microsoft Windows Hardware Compatibility Publisher
Signer organisation	Microsoft Corporation
Issuer	Microsoft Windows Third Party Component CA 2014
Serial	330000003A6AE333708FDA7A7B00000000003A
Valid from	2020-03-11 17:31 UTC
Valid until	2021-03-05 17:31 UTC (expired)
Signature validity	Not verified

• Certificate revision: 0x0200
• Certificate type: PKCS#7
• Chain: Microsoft Windows Third Party Component CA 2014

Symbolic execution

Engine angr, status static_approximation, 0 paths explored at a maximum depth of 0. Vulnerability classes reached: 0. Exploitable paths: 1.

Frequently asked questions about _LSTR_37_nep.sra_10_0.sys

Is _LSTR_37_nep.sra_10_0.sys safe?

Based on DriverShield static and dynamic analysis, _LSTR_37_nep.sra_10_0.sys is flagged as vulnerable and is a potential Bring Your Own Vulnerable Driver (BYOVD) risk. Its composite risk score is 72/100 (verdict: vulnerable). Always validate findings independently before acting.

What is the risk score of _LSTR_37_nep.sra_10_0.sys?

_LSTR_37_nep.sra_10_0.sys has a DriverShield composite risk score of 72/100, placing it in the vulnerable verdict band. SHA256: 87e791e95d65f3f6f1f5fd1d62309030822dac3c3d124da820bc692566e84b48.

What is _LSTR_37_nep.sra_10_0.sys?

_LSTR_37_nep.sra_10_0.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 Hardware Compatibility Publisher.

Related: Other drivers signed by Microsoft Windows Hardware Compatibility Publisher · What an IOCTL dispatch code is · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas

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