Analysis of mtcBSv64.sys: vulnerable verdict, risk score 72/100. 3 YARA matches, 4/74 multi-engine detections. SHA256 c9cf1d627078f63a. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver mtcBSv64.sys and assigned a verdict of Vulnerable with a composite risk score of 72/100, indicating a known or likely vulnerability surface (60-79 band).
| Verdict | Vulnerable (72/100) |
| YARA matches | 3 |
| Multi-engine detections | 4 / 74 |
| File size | 34328 bytes |
| Code-signing signer | VeriSign Time Stamping Services Signer - G2 |
| Analyzed | 2026-09-06 |
| SHA256 | c9cf1d627078f63a36bbde364cd0d5f2be1714124d186c06db5bcdf549a109f8 |
| SHA1 | 29a190727140f40cea9514a6420f5a195e36386b |
| MD5 | 9dfd73dadb2f1c7e9c9d2542981aaa63 |
Version resource data embedded in the mtcBSv64.sys PE header, as extracted by the analysis engine.
| File description | MiTAC System Service Provider |
|---|---|
| Product | MiTAC System Service Provider |
| Company | MiTAC Technology Corporation |
| Original filename | mtcBSv64.sys |
| Internal name | mtcBSv64.sys |
| File version | 21, 1, 4, 0 |
| Copyright | Copyright (C) 2007 MiTAC Technology Corporation |
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 | 85 / 100 |
| Dangerous kernel imports | 100 / 100 |
| IOCTL dispatch surface | 33 / 100 |
| Known-vulnerable corpus | 100 / 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 mtcBSv64.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapIoSpace | critical | Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination |
| MmUnmapIoSpace | medium | Moderate risk - system modification capability |
| KeBugCheckEx | medium | Moderate risk - system modification capability |
| KeSetEvent | low | Standard kernel API - generally benign |
| IoBuildDeviceIoControlRequest | low | Standard kernel API - generally benign |
| KeWaitForSingleObject | low | Standard kernel API - generally benign |
| IoDeleteSymbolicLink | low | Standard kernel API - generally benign |
| KeInitializeEvent | low | Standard kernel API - generally benign |
| IoCreateDevice | low | Standard kernel API - generally benign |
| ExAllocatePool | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| IoDeleteDevice | 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 |
|---|---|---|---|
| 0x0080840F | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #259 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x9C406400 | medium | METHOD_BUFFERED | CUSTOM_LENOVO Function #2304 |
| 0x9C406404 | medium | METHOD_BUFFERED | CUSTOM_LENOVO Function #2305 |
| 0x9C40A444 | medium | METHOD_BUFFERED | CUSTOM_LENOVO Function #2321 |
| 0x00802484 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2337 |
| 0x0080F881 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3616 |
| 0x9C40A448 | medium | METHOD_BUFFERED | CUSTOM_LENOVO Function #2322 |
| 0x00340370 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #220 |
| 0x00340020 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #8 |
| 0x00340036 | medium | METHOD_OUT_DIRECT | FILE_DEVICE_DISK Function #13 |
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 | 0x3423 | 0x3600 | 6.39 | CODE, EXEC, READ |
| .rdata | 0x0B7C | 0x0C00 | 4.96 | IDATA, READ |
| .data | 0x0430 | 0x0400 | 2.15 | IDATA, READ, WRITE |
| .pdata | 0x0234 | 0x0400 | 2.49 | IDATA, READ |
| PAGE | 0x10F6 | 0x1200 | 5.89 | CODE, EXEC, READ |
| INIT | 0x05E6 | 0x0600 | 5.34 | CODE, EXEC, READ, WRITE, DISCARD |
| .rsrc | 0x03D0 | 0x0400 | 3.22 | IDATA, READ, DISCARD |
| .reloc | 0x0116 | 0x0200 | 2.25 | 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_Mitactechnologycorporation_Mtcbsvsys_Mitacsystemserviceprovider_C9CF | medium | Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - mtcBSv64.sys. Investigate matches in context: expected filenames or standard... |
| 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 |
| T1055.012 | Process Hollowing | Defense Evasion |
| T1068 | Exploitation for Privilege Escalation | Privilege Escalation |
| T1071 | Application Layer Protocol | Command and Control |
| T1211 | Exploitation for Defense Evasion | Defense Evasion |
| T1543.003 | Windows Service | Persistence |
| T1553.002 | Subvert Trust Controls: Code Signing | Defense Evasion |
| T1562.001 | Impair Defenses | Defense Evasion |
| T1569.002 | Service Execution | Execution |
| T1652 | Device Driver Discovery | Discovery |
| Signer | VeriSign Time Stamping Services Signer - G2 |
|---|---|
| Signer organisation | VeriSign, Inc. |
| Issuer | VeriSign Time Stamping Services CA |
| Serial | 3825D7FAF861AF9EF490E726B5D65AD5 |
| Valid from | 2007-06-15 00:00 UTC |
| Valid until | 2012-06-14 23:59 UTC (expired) |
| Signature validity | Not verified |
Engine angr, status completed, 100 paths explored at a maximum depth of 100. Vulnerability classes reached: 0. 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, mtcBSv64.sys is flagged as vulnerable and is a potential Bring Your Own Vulnerable Driver (BYOVD) risk. Its composite risk score is 72/100 (verdict: vulnerable). Always validate findings independently before acting.
mtcBSv64.sys has a DriverShield composite risk score of 72/100, placing it in the vulnerable verdict band. SHA256: c9cf1d627078f63a36bbde364cd0d5f2be1714124d186c06db5bcdf549a109f8.
mtcBSv64.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 Signer - G2.
Related: Other drivers signed by VeriSign Time Stamping Services Signer - G2 · What an IOCTL dispatch code is · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas