Analysis of GoFly64.sys: vulnerable verdict, risk score 60/100. 1 YARA match, 3/76 multi-engine detections. SHA256 2fdfdd13a0c548bb. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver GoFly64.sys and assigned a verdict of Vulnerable with a composite risk score of 60/100, indicating a known or likely vulnerability surface (60-79 band).
| Verdict | Vulnerable (60/100) |
| YARA matches | 1 |
| Multi-engine detections | 3 / 76 |
| File size | 132088 bytes |
| Code-signing signer | Symantec Time Stamping Services CA - G2 |
| Analyzed | 2026-04-14 |
| SHA256 | 2fdfdd13a0c548bb68c9d5aa8599a9265d4659da3e237fe7a42ac6ac06b9a06a |
| SHA1 | bc61ef6d7ad9ee878028f24d50e9dcf6d7d88bf2 |
| MD5 | 26b2da88cb95b98b46bb985f67f76154 |
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 | 5 / 100 |
| Dangerous kernel imports | 100 / 100 |
| IOCTL dispatch surface | 51 / 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 GoFly64.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| ZwTerminateProcess | critical | Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination |
| MmMapLockedPagesSpecifyCache | 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 |
| PsSetCreateProcessNotifyRoutineEx | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| ZwOpenProcess | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| ZwWriteFile | medium | Moderate risk - system modification capability |
| PsSetLoadImageNotifyRoutine | medium | Moderate risk - system modification capability |
| ObReferenceObjectByHandle | medium | Moderate risk - system modification capability |
| ZwSetInformationFile | medium | Moderate risk - system modification capability |
| IoGetDeviceObjectPointer | medium | Moderate risk - system modification capability |
| KeBugCheckEx | medium | Moderate risk - system modification capability |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| IoCreateDevice | low | Standard kernel API - generally benign |
| ZwReadFile | low | Standard kernel API - generally benign |
| IoBuildDeviceIoControlRequest | low | Standard kernel API - generally benign |
| KeWaitForSingleObject | low | Standard kernel API - generally benign |
| IofCompleteRequest | low | Standard kernel API - generally benign |
| ZwQueryInformationFile | low | Standard kernel API - generally benign |
| ExAllocatePool | low | Standard kernel API - generally benign |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| KeInitializeEvent | low | Standard kernel API - generally benign |
| ExAllocatePoolWithTag | low | Standard kernel API - generally benign |
| ZwCreateFile | low | Standard kernel API - generally benign |
| KeSetEvent | low | Standard kernel API - generally benign |
| IoDeleteDevice | low | Standard kernel API - generally benign |
| DbgPrint | low | Standard kernel API - generally benign |
| ZwClose | 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 |
|---|---|---|---|
| 0x0080870F | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #451 |
| 0x0080840F | high | METHOD_NEITHER | FILE_DEVICE_CUSTOM Function #259 |
| 0x002200F0 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #60 |
| 0x0022ABE8 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #2810 |
| 0x00223FE8 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #4090 |
| 0x0022C7E8 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #506 |
| 0x0080B914 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #3653 |
| 0x00802484 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2337 |
| 0x0080248C | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2339 |
| 0x00800548 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #338 |
| 0x008024BC | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #2351 |
| 0x003447E8 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #506 |
| 0x0034E3E8 | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #2298 |
| 0x002217E8 | medium | METHOD_BUFFERED | FILE_DEVICE_UNKNOWN Function #1530 |
| 0x0080B9C0 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #3696 |
| 0x00802315 | medium | METHOD_IN_DIRECT | FILE_DEVICE_CUSTOM Function #2245 |
| 0x00340076 | medium | METHOD_OUT_DIRECT | FILE_DEVICE_DISK Function #29 |
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 | 0x158B0 | 0x15A00 | 5.65 | CODE, EXEC, READ |
| .rdata | 0x1454 | 0x1600 | 5.22 | IDATA, READ |
| .data | 0x0601 | 0x0200 | 0.63 | IDATA, READ, WRITE |
| .pdata | 0x1458 | 0x1600 | 4.69 | IDATA, READ |
| INIT | 0x0FFE | 0x1000 | 5.68 | CODE, EXEC, READ, DISCARD |
| .reloc | 0x0044 | 0x0200 | 1 | IDATA, READ, DISCARD |
| Control Flow Guard | Not enabled |
|---|---|
| ASLR | Enabled |
| DEP | Enabled |
| Integrity check | Not enforced |
| Mitigation score | 55 / 100 |
| Rule | Severity | Detects |
|---|---|---|
| SUSP_Callbacks | medium | Kernel callback registration |
Techniques this driver could enable if loaded by an adversary.
| ID | Technique | Tactic |
|---|---|---|
| T1003.001 | OS Credential Dumping: LSASS Memory | Credential Access |
| T1014 | Rootkit | Defense Evasion |
| T1055.001 | Process Injection: DLL Injection | 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 |
| T1489 | Service Stop | Impact |
| T1543.003 | Windows Service | Persistence |
| T1553.002 | Subvert Trust Controls: Code Signing | Defense Evasion |
| T1562.001 | Disable/Modify Tools | Defense Evasion |
| T1562.006 | Indicator Blocking | Defense Evasion |
| T1564.001 | Hidden Files and Directories | 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.
Based on DriverShield static and dynamic analysis, GoFly64.sys is flagged as vulnerable and is a potential Bring Your Own Vulnerable Driver (BYOVD) risk. Its composite risk score is 60/100 (verdict: vulnerable). Always validate findings independently before acting.
GoFly64.sys has a DriverShield composite risk score of 60/100, placing it in the vulnerable verdict band. SHA256: 2fdfdd13a0c548bb68c9d5aa8599a9265d4659da3e237fe7a42ac6ac06b9a06a.
GoFly64.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