Analysis of SDFRd.sys: clean verdict, risk score 15/100. 0 YARA matches. SHA256 5e940ca63ad21cea. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver SDFRd.sys and assigned a verdict of Clean with a composite risk score of 15/100, indicating no notable risk signals (0-29 band).
| Verdict | Clean (15/100) |
| YARA matches | 0 |
| File size | 35128 bytes |
| Code-signing signer | Microsoft Windows |
| Analyzed | 2026-03-22 |
| SHA256 | 5e940ca63ad21cea08c334ac61d985bafdba7dcb2d388f355b5c72efa3e23e0a |
| SHA1 | 208921b94650cfb94b1058f7513a641c1c4c61e0 |
| MD5 | 3200667db433f0a2032faf4dc02e2089 |
Version resource data embedded in the SDFRd.sys PE header, as extracted by the analysis engine.
| File description | SDF Reflector |
|---|---|
| Product | Microsoft® Windows® Operating System |
| Company | Microsoft Corporation |
| Original filename | SDFRd.sys |
| Internal name | SDFRd.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 | 42 / 100 |
| IOCTL dispatch surface | 27 / 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 |
Kernel-mode APIs resolved from the Import Address Table of SDFRd.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| PsLookupProcessByProcessId | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| DbgPrintEx | low | Standard kernel API - generally benign |
| KeDelayExecutionThread | 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 |
|---|---|---|---|
| 0x00800043 | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #16 |
| 0x0080002F | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #11 |
| 0x00223417 | high | METHOD_NEITHER | FILE_DEVICE_UNKNOWN Function #3333 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x0080EC81 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #2848 |
| 0x00802494 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2341 |
| 0x00228341 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #208 |
| 0x00228348 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #210 |
| 0x00340370 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #220 |
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 | 0x0F69 | 0x1000 | 5.83 | CODE, EXEC, READ |
| .rdata | 0x1010 | 0x1200 | 5.06 | IDATA, READ |
| .data | 0x03C0 | 0x0200 | 0.93 | IDATA, READ, WRITE |
| .pdata | 0x0378 | 0x0400 | 3.81 | IDATA, READ |
| .idata | 0x03A8 | 0x0400 | 3.86 | IDATA, READ |
| PAGE | 0x2CC3 | 0x2E00 | 6.06 | CODE, EXEC, READ |
| INIT | 0x01E2 | 0x0200 | 5.5 | CODE, EXEC, READ, DISCARD |
| GFIDS | 0x0048 | 0x0200 | 0.65 | IDATA, READ, DISCARD |
| .rsrc | 0x03E0 | 0x0400 | 3.24 | IDATA, READ, DISCARD |
| .reloc | 0x01F8 | 0x0200 | 5.31 | IDATA, READ, DISCARD |
| Control Flow Guard | Enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Not enforced |
| Mitigation score | 85 / 100 |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1055.001 | Process Injection: DLL Injection | Defense Evasion |
| T1071 | Application Layer Protocol | Command and Control |
| T1211 | Exploitation for Defense Evasion | Defense Evasion |
| T1489 | Service Stop | Impact |
| T1543.003 | Windows Service | Persistence |
| T1553.002 | Subvert Trust Controls: Code Signing | Defense Evasion |
| T1562.001 | Impair Defenses: Disable/Modify Tools | Defense Evasion |
| T1652 | Device Driver Discovery | Discovery |
| Signer | Microsoft Windows |
|---|---|
| Signer organisation | Microsoft Corporation |
| Issuer | Microsoft Windows Production PCA 2011 |
| Serial | 330000023241FB59996DCC4DFF000000000232 |
| Valid from | 2019-05-02 21:24 UTC |
| Valid until | 2020-05-02 21:24 UTC (expired) |
| Signature validity | Not verified |
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, SDFRd.sys is assessed as clean, with no notable risk signals. Its composite risk score is 15/100 (verdict: clean). Always validate findings independently before acting.
SDFRd.sys has a DriverShield composite risk score of 15/100, placing it in the clean verdict band. SHA256: 5e940ca63ad21cea08c334ac61d985bafdba7dcb2d388f355b5c72efa3e23e0a.
SDFRd.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