Analysis of segwindrvx64.sys: vulnerable verdict, risk score 72/100. 3 YARA matches, 3/75 multi-engine detections. SHA256 65329dad28e92f4b. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver segwindrvx64.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 | 3 / 75 |
| File size | 65224 bytes |
| Code-signing signer | Symantec Time Stamping Services CA - G2 |
| Analyzed | 2026-09-06 |
| SHA256 | 65329dad28e92f4bcc64de15c552b6ef424494028b18875b7dba840053bc0cdd |
| SHA1 | d702d88b12233be9413446c445f22fda4a92a1d9 |
| MD5 | 4ae55080ec8aed49343e40d08370195c |
Version resource data embedded in the segwindrvx64.sys PE header, as extracted by the analysis engine.
| File description | SEG Windows Driver x64 |
|---|---|
| Product | SEG Windows Driver x64 |
| Company | Insyde Software Corp. |
| Original filename | segwindrvx64.sys |
| Internal name | segwindrvx64.sys |
| File version | 100.00.07.02 |
| Copyright | Copyright (c) 2012 - 2015, Insyde Software Corp. 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 | 85 / 100 |
| Dangerous kernel imports | 100 / 100 |
| IOCTL dispatch surface | 54 / 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 segwindrvx64.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapLockedPagesSpecifyCache | 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 |
| MmGetSystemRoutineAddress | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| MmAllocateContiguousMemorySpecifyCache | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| MmGetPhysicalAddress | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| ZwWriteFile | medium | Moderate risk - system modification capability |
| MmUnmapIoSpace | medium | Moderate risk - system modification capability |
| KeBugCheckEx | medium | Moderate risk - system modification capability |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| IoDeleteSymbolicLink | low | Standard kernel API - generally benign |
| ExAllocatePool | low | Standard kernel API - generally benign |
| ZwCreateFile | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| IoCreateDevice | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| RtlInitAnsiString | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| ZwClose | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | 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 |
| 0x0080BA00 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #3712 |
| 0x00802484 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2337 |
| 0x00802824 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2569 |
| 0x0034002D | medium | METHOD_IN_DIRECT | FILE_DEVICE_DISK Function #11 |
| 0x00340036 | medium | METHOD_OUT_DIRECT | FILE_DEVICE_DISK Function #13 |
| 0x00222286 | medium | METHOD_OUT_DIRECT | FILE_DEVICE_UNKNOWN Function #2209 |
| 0x00222141 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #2128 |
| 0x002222D2 | medium | METHOD_OUT_DIRECT | FILE_DEVICE_UNKNOWN Function #2228 |
| 0x00803B15 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #3781 |
| 0x00800315 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #197 |
| 0x00342464 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #2329 |
| 0x0022D315 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #1221 |
| 0x0022EB15 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #2757 |
| 0x0022C315 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #197 |
| 0x00225F05 | medium | METHOD_IN_DIRECT | FILE_DEVICE_UNKNOWN Function #1985 |
| 0x003403B8 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #238 |
| 0xC350A7A8 | medium | METHOD_BUFFERED | CUSTOM_MSI Function #2538 |
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 | 0x3790 | 0x3800 | 6.37 | CODE, EXEC, READ |
| page | 0x7BAC | 0x7C00 | 6.44 | CODE, EXEC, READ |
| init | 0x08E0 | 0x0A00 | 5.75 | CODE, EXEC, READ |
| .rdata | 0x08AC | 0x0A00 | 4.24 | IDATA, READ |
| .data | 0x07C8 | 0x0200 | 0.36 | IDATA, READ, WRITE |
| .pdata | 0x03C0 | 0x0400 | 4.1 | IDATA, READ |
| INIT | 0x042A | 0x0600 | 4.23 | CODE, EXEC, READ, WRITE, DISCARD |
| .rsrc | 0x0418 | 0x0600 | 2.5 | IDATA, READ, DISCARD |
| .reloc | 0x0014 | 0x0200 | 0.21 | IDATA, READ, DISCARD |
| Control Flow Guard | Not enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Not enforced |
| Mitigation score | 55 / 100 |
| Rule | Severity | Detects |
|---|---|---|
| PUA_VULN_Driver_Insydesoftwarecorp_Segwindrvxsys_Segwindowsdriverx_6532 | medium | Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - segwindrvx64.sys. Investigate matches in context: expected filenames or stan... |
| 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 |
| 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 |
| T1562.001 | Impair Defenses | Defense Evasion |
| T1569.002 | Service Execution | Execution |
| T1652 | Device Driver Discovery | Discovery |
| Signer | Symantec Time Stamping Services CA - G2 |
|---|---|
| Signer organisation | Symantec Corporation |
| Issuer | Thawte Timestamping CA |
| Serial | 7E93EBFB7CC64E59EA4B9A77D406FC3B |
| Valid from | 2012-12-21 00:00 UTC |
| Valid until | 2020-12-30 23:59 UTC (expired) |
| Signature validity | Not verified |
Engine angr, status static_approximation, 0 paths explored at a maximum depth of 0. 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, segwindrvx64.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.
segwindrvx64.sys has a DriverShield composite risk score of 72/100, placing it in the vulnerable verdict band. SHA256: 65329dad28e92f4bcc64de15c552b6ef424494028b18875b7dba840053bc0cdd.
segwindrvx64.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators. It is code-signed by Symantec Time Stamping Services CA - G2.
Related: Other drivers signed by Symantec Time Stamping Services CA - G2 · What an IOCTL dispatch code is · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas