Analysis of atillk64.sys: vulnerable verdict, risk score 78/100. 4 YARA matches, 1/75 multi-engine detections. SHA256 ad40e6d0f77c0e57. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver atillk64.sys and assigned a verdict of Vulnerable with a composite risk score of 78/100, indicating a known or likely vulnerability surface (60-79 band).
| Verdict | Vulnerable (78/100) |
| YARA matches | 4 |
| Multi-engine detections | 1 / 75 |
| File size | 14608 bytes |
| Code-signing signer | VeriSign Time Stamping Services CA |
| Analyzed | 2026-09-06 |
| SHA256 | ad40e6d0f77c0e579fb87c5106bf6de3d1a9f30ee2fbf8c9c011f377fa05f173 |
| SHA1 | eb0d45aa6f537f5b2f90f3ad99013606eafcd162 |
| MD5 | 26d973d6d9a0d133dfda7d8c1adc04b7 |
Version resource data embedded in the atillk64.sys PE header, as extracted by the analysis engine.
| File description | ATI Diagnostics Hardware Abstraction Sys |
|---|---|
| Product | ATI Diagnostics |
| Company | ATI Technologies Inc. |
| Original filename | atillk64.sys |
| Internal name | atillk64.sys |
| File version | 5.11.9.0 |
| Copyright | Copyright (C) ATI Technologies Inc., 2003 |
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 | 90 / 100 |
| Dangerous kernel imports | 100 / 100 |
| IOCTL dispatch surface | 12 / 100 |
| Known-vulnerable corpus | 100 / 100 |
| Code-signing state | 80 / 100 |
| Packing and entropy | 0 / 100 |
| Dynamic behaviour | 0 / 100 |
| CVE cross-reference | 40 / 100 |
Kernel-mode APIs resolved from the Import Address Table of atillk64.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapLockedPages | critical | Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination |
| MmMapIoSpace | critical | Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination |
| HalGetBusDataByOffset | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| HalSetBusDataByOffset | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| MmUnmapIoSpace | medium | Moderate risk - system modification capability |
| IoCreateDevice | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| IoDeleteSymbolicLink | 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 |
|---|---|---|---|
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x00808189 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #98 |
| 0x00340036 | medium | METHOD_OUT_DIRECT | FILE_DEVICE_DISK Function #13 |
| 0x00340348 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #210 |
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 | 0x0AE2 | 0x0C00 | 5.6 | CODE, EXEC, READ |
| .rdata | 0x0158 | 0x0200 | 3.31 | IDATA, READ |
| .data | 0x0110 | 0x0200 | 0.3 | IDATA, READ, WRITE |
| .pdata | 0x0030 | 0x0200 | 0.42 | IDATA, READ |
| INIT | 0x025E | 0x0400 | 3.26 | CODE, EXEC, READ, WRITE, DISCARD |
| .rsrc | 0x03A8 | 0x0400 | 3.11 | IDATA, READ, DISCARD |
| Control Flow Guard | Not enabled |
|---|---|
| ASLR | Not enabled |
| DEP | Not enabled |
| Integrity check | Not enforced |
| Mitigation score | 5 / 100 |
| Rule | Severity | Detects |
|---|---|---|
| PUA_VULN_Driver_Atitechnologiesinc_Atillksys_Atidiagnostics_38BB | medium | Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - atillk64.sys. Investigate matches in context: expected filenames or standard... |
| PUA_VULN_Driver_Atitechnologiesinc_Atillksys_Atidiagnostics_AD40 | medium | Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - atillk64.sys |
| BYOVD_MemRW | critical | Phys memory mapping + device creation |
| SUSP_PhysMem | high | Physical memory mapping |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1003 | OS Credential Dumping | Credential Access |
| T1003.001 | OS Credential Dumping: LSASS Memory | Credential Access |
| T1006 | Direct Volume Access | Defense Evasion |
| T1014 | Rootkit | Defense Evasion |
| T1055.012 | Process Hollowing | Defense Evasion |
| T1068 | Exploitation for Privilege Escalation | Privilege Escalation |
| T1071 | Application Layer Protocol | Command and Control |
| T1542.001 | Pre-OS Boot: System Firmware | Persistence |
| T1543.003 | Windows Service | Persistence |
| T1562.001 | Impair Defenses | Defense Evasion |
| T1569.002 | Service Execution | Execution |
| T1601 | Modify System Image | Defense Evasion |
| T1652 | Device Driver Discovery | Discovery |
| Signer | VeriSign Time Stamping Services CA |
|---|---|
| Signer organisation | VeriSign, Inc. |
| Issuer | Thawte Timestamping CA |
| Serial | 47BF1995DF8D524643F7DB6D480D31A4 |
| Valid from | 2003-12-04 00:00 UTC |
| Valid until | 2013-12-03 23:59 UTC (expired) |
| Signature validity | Not verified |
Engine angr, status completed, 17 paths explored at a maximum depth of 17. Vulnerability classes reached: 1. Exploitable paths: 0.
Corpus match: this hash is present in the known-vulnerable driver corpus DriverShield cross-references during analysis, which is why the score carries a full weighting on that component.
Based on DriverShield static and dynamic analysis, atillk64.sys is flagged as vulnerable and is a potential Bring Your Own Vulnerable Driver (BYOVD) risk. Its composite risk score is 78/100 (verdict: vulnerable). Always validate findings independently before acting.
atillk64.sys has a DriverShield composite risk score of 78/100, placing it in the vulnerable verdict band. SHA256: ad40e6d0f77c0e579fb87c5106bf6de3d1a9f30ee2fbf8c9c011f377fa05f173.
atillk64.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators. It is code-signed by VeriSign Time Stamping Services CA.
Related: Other drivers signed by VeriSign Time Stamping Services CA · CVE-2023-25099 · What an IOCTL dispatch code is · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas