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

Analysis of sentinel_filter.sys: clean verdict, risk score 4/100. 0 YARA matches. SHA256 ef538343acf67aab. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

sentinel_filter.sys - Analysis Report

DriverShield analyzed the Windows kernel driver sentinel_filter.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	15264 bytes
Code-signing signer	SentinelDLPTestCert
Analyzed	2026-09-25
SHA256	ef538343acf67aab468f4f623cf242e98c959e3d60a14c67751f00ed5cab4a1f
SHA1	b54e29b802719ed10075d56966fa8f4225812e11
MD5	e8e331077bc8bde55f00c35cef56ae38

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	15 / 100
IOCTL dispatch surface	9 / 100
Known-vulnerable corpus	0 / 100
Code-signing state	0 / 100
Packing and entropy	0 / 100
Dynamic behaviour	0 / 100
CVE cross-reference	0 / 100

Kernel imports (3)

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

API	Risk	Why it matters
ExAllocatePoolWithTag	low	Standard kernel API - generally benign
ProbeForWrite	low	Standard kernel API - generally benign
ProbeForRead	low	Standard kernel API - generally benign

IOCTL dispatch codes (3)

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
0x00221847	high	METHOD_NEITHER	FILE_DEVICE_UNKNOWN Function #1553
0x002200F0	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #60
0x00220020	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #8

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	0x0FB7	0x1000	5.9	CODE, EXEC, READ
fothk	0x1000	0x1000	0.02	CODE, EXEC, READ
.rdata	0x0760	0x0800	2.14	IDATA, READ
.data	0x107C	0x0200	0.14	IDATA, READ, WRITE
.pdata	0x0108	0x0200	2.12	IDATA, READ
INIT	0x034E	0x0400	3.98	CODE, EXEC, READ, DISCARD
.reloc	0x0098	0x0200	1.15	IDATA, READ, DISCARD

Exploit mitigations

Control Flow Guard	Not enabled
ASLR	Enabled
DEP	Enabled
Integrity check	Not enforced
Mitigation score	70 / 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.
Valid Signature - The driver has a valid, non-expired digital signature.

MITRE ATT&CK techniques (4)

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
T1652	Device Driver Discovery	Discovery

Code-signing chain

Signer	SentinelDLPTestCert
Issuer	SentinelDLPTestCert
Serial	516097FBD3D03E9046E8D09E71CD220C
Valid from	2026-05-20 06:34 UTC
Valid until	2039-12-31 23:59 UTC
Signature validity	Verified

Certificate revision: 0x0200
Certificate type: PKCS#7

Symbolic execution

Engine angr, status completed, 100 paths explored at a maximum depth of 100. Vulnerability classes reached: 0. Exploitable paths: 0.

Frequently asked questions about sentinel_filter.sys

Is sentinel_filter.sys safe?

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

sentinel_filter.sys has a DriverShield composite risk score of 4/100, placing it in the clean verdict band. SHA256: ef538343acf67aab468f4f623cf242e98c959e3d60a14c67751f00ed5cab4a1f.

What is sentinel_filter.sys?

sentinel_filter.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators. It is code-signed by SentinelDLPTestCert.

Related: Other drivers signed by SentinelDLPTestCert · What an IOCTL dispatch code is · BYOVD research index · full driver database · CVE library · code signing atlas