Analysis of ws2ifsl.sys: clean verdict, risk score 12/100. 0 YARA matches. SHA256 daff7ce8868299af. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver ws2ifsl.sys and assigned a verdict of Clean with a composite risk score of 12/100, indicating no notable risk signals (0-29 band).
| Verdict | Clean (12/100) |
| YARA matches | 0 |
| File size | 25088 bytes |
| Analyzed | 2026-03-22 |
| SHA256 | daff7ce8868299af5efa844c2e1f84b7ee7e498b1aff16965ce41c2e75b2f4e4 |
| SHA1 | 0138ad70fcd85554070c8bd773666c577acd1bb6 |
| MD5 | 2b98dfc181823c8d8aa39c4cc577de3e |
Version resource data embedded in the ws2ifsl.sys PE header, as extracted by the analysis engine.
| File description | Winsock2 IFS Layer |
|---|---|
| Product | Microsoft® Windows® Operating System |
| Company | Microsoft Corporation |
| Original filename | ws2ifsl.sys |
| Internal name | ws2ifsl.sys |
| File version | 10.0.19041.1 (WinBuild.160101.0800) |
| Copyright | © Microsoft Corporation. All rights reserved. |
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 | 36 / 100 |
| IOCTL dispatch surface | 24 / 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-mode APIs resolved from the Import Address Table of ws2ifsl.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| ObReferenceObjectByHandle | medium | Moderate risk - system modification capability |
| IoCreateDevice | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| ProbeForWrite | low | Standard kernel API - generally benign |
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 |
|---|---|---|---|
| 0x0080BB83 | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #3808 |
| 0x0080A383 | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #2272 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x0080248C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2339 |
| 0x008024A4 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2345 |
| 0x00802484 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2337 |
| 0x00808389 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #226 |
| 0x00340384 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #225 |
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 | 0x122A | 0x1400 | 5.54 | CODE, EXEC, READ |
| .rdata | 0x07F8 | 0x0800 | 4.58 | IDATA, READ |
| .data | 0x0180 | 0x0200 | 0.38 | IDATA, READ, WRITE |
| .pdata | 0x02B8 | 0x0400 | 3.03 | IDATA, READ |
| .idata | 0x063C | 0x0800 | 3.7 | IDATA, READ |
| PAGE | 0x24BC | 0x2600 | 6.04 | CODE, EXEC, READ |
| INIT | 0x0162 | 0x0200 | 4.28 | CODE, EXEC, READ, DISCARD |
| GFIDS | 0x0054 | 0x0200 | 0.71 | IDATA, READ, DISCARD |
| .rsrc | 0x0598 | 0x0600 | 3.07 | IDATA, READ, DISCARD |
| .reloc | 0x0334 | 0x0400 | 4.36 | IDATA, READ, DISCARD |
| Control Flow Guard | Enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Not enforced |
| Mitigation score | 80 / 100 |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1543.003 | Windows Service | Persistence |
| T1553.006 | Code Signing Policy Modification | Defense Evasion |
| T1569.002 | Service Execution | Execution |
| T1652 | Device Driver Discovery | Discovery |
Engine angr, status no_findings, 0 paths explored at a maximum depth of 0. Vulnerability classes reached: 0. Exploitable paths: 0.
Based on DriverShield static and dynamic analysis, ws2ifsl.sys is assessed as clean, with no notable risk signals. Its composite risk score is 12/100 (verdict: clean). Always validate findings independently before acting.
ws2ifsl.sys has a DriverShield composite risk score of 12/100, placing it in the clean verdict band. SHA256: daff7ce8868299af5efa844c2e1f84b7ee7e498b1aff16965ce41c2e75b2f4e4.
ws2ifsl.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators.
Related: What an IOCTL dispatch code is · BYOVD research index · full driver database · CVE library · code signing atlas