Analysis of magdrv.sys: vulnerable verdict, risk score 72/100. 2 YARA matches, 0/74 multi-engine detections. SHA256 3c51c95e93cf2823. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.
DriverShield analyzed the Windows kernel driver magdrv.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 | 2 |
| Multi-engine detections | 0 / 74 |
| File size | 15800 bytes |
| Code-signing signer | Symantec Time Stamping Services CA - G2 |
| Analyzed | 2026-07-22 |
| SHA256 | 3c51c95e93cf282312feca198f8913bd10523efab5f77ca869eeba39c36d1d91 |
| SHA1 | 9ec90894f587eeeea86264758d74d5974b678fbc |
| MD5 | 5d84e25eb0be704b1d6f9e4f6917cc3c |
Version resource data embedded in the magdrv.sys PE header, as extracted by the analysis engine.
| File description | Samsung Magician Application Resource |
|---|---|
| Product | Samsung Magician |
| Company | Samsung India Software Operations (SISO) |
| Original filename | Driver |
| Internal name | Driver |
| File version | 1, 0, 0, 396 |
| Copyright | Copyright © 2015 SAMSUNG Electronics Co. Ltd. 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 | 80 / 100 |
| Dangerous kernel imports | 100 / 100 |
| IOCTL dispatch surface | 6 / 100 |
| Known-vulnerable corpus | 0 / 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 magdrv.sys, ranked by exploitation relevance.
| API | Risk | Why it matters |
|---|---|---|
| MmMapIoSpace | critical | Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination |
| WRITE_PORT_ULONG | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| READ_PORT_ULONG | high | Potentially dangerous - could be used for privilege escalation or security bypass |
| MmUnmapIoSpace | medium | Moderate risk - system modification capability |
| IoCreateSymbolicLink | low | Standard kernel API - generally benign |
| IoCreateDevice | low | Standard kernel API - generally benign |
| RtlInitUnicodeString | low | Standard kernel API - generally benign |
| IoDeleteSymbolicLink | low | Standard kernel API - generally benign |
| IofCompleteRequest | 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 |
|---|---|---|---|
| 0x00800068 | medium | METHOD_BUFFERED | FILE_DEVICE_CUSTOM Function #26 |
| 0x0034038C | medium | METHOD_BUFFERED | FILE_DEVICE_DISK Function #227 |
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 | 0x06FD | 0x0800 | 5.13 | CODE, EXEC, READ |
| .rdata | 0x0030 | 0x0200 | 0.34 | IDATA, READ |
| .data | 0x052F | 0x0600 | 4.53 | IDATA, READ, WRITE |
| INIT | 0x014C | 0x0200 | 3.35 | CODE, EXEC, READ, WRITE, DISCARD |
| .rsrc | 0x0484 | 0x0600 | 4.11 | IDATA, READ, DISCARD |
| .reloc | 0x0088 | 0x0200 | 1.18 | 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 |
|---|---|---|
| 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 |
| T1569.002 | Service Execution | Execution |
| T1601 | Modify System Image | Defense Evasion |
| 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 completed, 1 paths explored at a maximum depth of 1. Vulnerability classes reached: 0. Exploitable paths: 1.
Based on DriverShield static and dynamic analysis, magdrv.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.
magdrv.sys has a DriverShield composite risk score of 72/100, placing it in the vulnerable verdict band. SHA256: 3c51c95e93cf282312feca198f8913bd10523efab5f77ca869eeba39c36d1d91.
magdrv.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 · CVE-2018-19320 · What an IOCTL dispatch code is · How YARA matching feeds the score · BYOVD research index · full driver database · CVE library · code signing atlas