Analysis of TsUsbFlt.sys: clean verdict, risk score 17/100. 0 YARA matches. SHA256 ad6de675ac033be6. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver TsUsbFlt.sys and assigned a verdict of Clean with a composite risk score of 17/100, indicating no notable risk signals (0-29 band).
| Verdict | Clean (17/100) |
| YARA matches | 0 |
| File size | 66560 bytes |
| Analyzed | 2026-03-22 |
| SHA256 | ad6de675ac033be6bf75ff6303eaed4b5c672689d3aec6db94816d60e19b7030 |
| SHA1 | ed24be06f6c058eb0a9a0315bec2e37bf1be2c99 |
| MD5 | f613a8618cc19dd96d1e0c81c5dcb7d1 |
Version resource data embedded in the TsUsbFlt.sys PE header, as extracted by the analysis engine.
| File description | Remote Desktop USB Hub Filter Driver |
|---|---|
| Product | Microsoft® Windows® Operating System |
| Company | Microsoft Corporation |
| Original filename | TsUsbFlt.sys |
| Internal name | TsUsbFlt.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 | 39 / 100 |
| IOCTL dispatch surface | 60 / 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 TsUsbFlt.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmGetSystemRoutineAddress | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| KeInitializeEvent | low | Standard kernel API - generally benign |
| KeSetEvent | low | Standard kernel API - generally benign |
| ZwQueryValueKey | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| DbgPrintEx | low | Standard kernel API - generally benign |
| ZwClose | low | Standard kernel API - generally benign |
| KeWaitForSingleObject | low | Standard kernel API - generally benign |
| ZwOpenKey | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | 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 |
|---|---|---|---|
| 0x0080808B | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #34 |
| 0x0022341F | high | METHOD_NEITHER | FILE_DEVICE_UNKNOWN Function #3335 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x0080249C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2343 |
| 0x00802484 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2337 |
| 0x00220444 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #273 |
| 0x008024AC | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2347 |
| 0x00807B05 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3777 |
| 0x00224414 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #261 |
| 0x00343DD8 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #3958 |
| 0x003463E8 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #2298 |
| 0x00224418 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #262 |
| 0x0080AB15 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #2757 |
| 0x0034DF3D | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #1999 |
| 0x0022BF38 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #4046 |
| 0x0080248C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2339 |
| 0x0034002D | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #11 |
| 0x00340030 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #12 |
| 0x0022341E | medium | METHOD_OUT_DIRECT | FILE_DEVICE_UNKNOWN Function #3335 |
| 0x003403B0 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #236 |
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 | 0x9CAA | 0x9E00 | 6.14 | CODE, EXEC, READ |
| .rdata | 0x1C98 | 0x1E00 | 5.15 | IDATA, READ |
| .data | 0x0680 | 0x0400 | 1.55 | IDATA, READ, WRITE |
| .pdata | 0x05A0 | 0x0600 | 4.35 | IDATA, READ |
| .idata | 0x07D2 | 0x0800 | 4.39 | IDATA, READ |
| PAGE | 0x0D7E | 0x0E00 | 5.86 | CODE, EXEC, READ |
| INIT | 0x0282 | 0x0400 | 4.36 | CODE, EXEC, READ, DISCARD |
| GFIDS | 0x0074 | 0x0200 | 1.15 | IDATA, READ, DISCARD |
| .rsrc | 0x1648 | 0x1800 | 3.51 | IDATA, READ, DISCARD |
| .reloc | 0x05A0 | 0x0600 | 5.93 | 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 |
|---|---|---|
| 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 |
| 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, TsUsbFlt.sys is assessed as clean, with no notable risk signals. Its composite risk score is 17/100 (verdict: clean). Always validate findings independently before acting.
TsUsbFlt.sys has a DriverShield composite risk score of 17/100, placing it in the clean verdict band. SHA256: ad6de675ac033be6bf75ff6303eaed4b5c672689d3aec6db94816d60e19b7030.
TsUsbFlt.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