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

Analysis of portcfg.sys: clean verdict, risk score 10/100. 0 YARA matches. SHA256 65c33d25e0c00731. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

portcfg.sys - Analysis Report

DriverShield analyzed the Windows kernel driver portcfg.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	27136 bytes
Analyzed	2026-03-22
SHA256	65c33d25e0c00731d7def3f127523aa5178133481915287f3267a52c74577572
SHA1	015a04dc9375b11500c8f049112bd6c982d04155
MD5	562b9409aa8777204e78c629647344ec

Driver identity

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

File description	Port Device Class Configuration Filter Driver
Product	Microsoft® Windows® Operating System
Company	Microsoft Corporation
Original filename	portcfg.sys
Internal name	portcfg.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	30 / 100
IOCTL dispatch surface	18 / 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 (5)

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

API	Risk	Why it matters
NtQuerySystemInformation	medium	Moderate risk - system modification capability
DbgPrintEx	low	Standard kernel API - generally benign
ExAllocatePoolWithTag	low	Standard kernel API - generally benign
RtlInitUnicodeString	low	Standard kernel API - generally benign
ZwClose	low	Standard kernel API - generally benign

IOCTL dispatch codes (6)

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
0x0080E9FF	high	METHOD_NEITHER	FILE_DEVICE_CUSTOM Function #2687
0x002200F0	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #60
0x0022011C	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #71
0x00802024	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2057
0x00343DD8	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #3958
0x003403B8	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #238

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	0x16EA	0x1800	6.17	CODE, EXEC, READ
.rdata	0x0F20	0x1000	4.93	IDATA, READ
.data	0x0388	0x0200	0.75	IDATA, READ, WRITE
.pdata	0x0240	0x0400	2.59	IDATA, READ
.idata	0x049C	0x0600	3.54	IDATA, READ
PAGE	0x23DA	0x2400	6.11	CODE, EXEC, READ
INIT	0x00A6	0x0200	2.51	CODE, EXEC, READ, DISCARD
GFIDS	0x0014	0x0200	0.2	IDATA, READ, DISCARD
.rsrc	0x0428	0x0600	2.5	IDATA, READ, DISCARD
.reloc	0x02A8	0x0400	3.86	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 (7)

Techniques this driver could enable if loaded by an adversary.

ID	Technique	Tactic
T1112	Modify Registry	Defense Evasion
T1211	Exploitation for Defense Evasion	Defense Evasion
T1543.003	Windows Service	Persistence
T1547.001	Registry Run Keys	Persistence
T1553.002	Subvert Trust Controls: Code Signing	Defense Evasion
T1553.006	Code Signing Policy Modification	Defense Evasion
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 portcfg.sys

Is portcfg.sys safe?

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

portcfg.sys has a DriverShield composite risk score of 10/100, placing it in the clean verdict band. SHA256: 65c33d25e0c00731d7def3f127523aa5178133481915287f3267a52c74577572.

What is portcfg.sys?

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