RwDrv.sys - Suspicious (58/100) - DriverShield Analysis

Analysis of RwDrv.sys: suspicious verdict, risk score 58/100. 4 YARA matches, 2/75 multi-engine detections. SHA256 3c5bf92c26398695. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

RwDrv.sys - Analysis Report

DriverShield analyzed the Windows kernel driver RwDrv.sys and assigned a verdict of Suspicious with a composite risk score of 58/100, indicating some risk signals warranting review (30-59 band).

Verdict	Suspicious (58/100)
YARA matches	4
Multi-engine detections	2 / 75
File size	22312 bytes
Code-signing signer	VeriSign Time Stamping Services Signer - G2
Analyzed	2026-09-06
SHA256	3c5bf92c26398695f9ced7ce647a7e9f6ddcc89eea66b45aa3607196a187431b
SHA1	db6245578ec57bd767b27ecf8085095e1c8e5a6e
MD5	08cb435809a48b51fd31cd557ff86ef3

Driver identity

Version resource data embedded in the RwDrv.sys PE header, as extracted by the analysis engine.

File description	RW-Everything Read & Write Driver
Product	RW-Everything Read & Write Driver
Company	RW-Everything
Original filename	RwDrv.sys
Internal name	RwDrv.sys
File version	1.00.00.0000 built by: WinDDK
Copyright	Copyright (C) 2008 RW-Everything

How the 58/100 score breaks down

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	30 / 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 imports (16)

Kernel-mode APIs resolved from the Import Address Table of RwDrv.sys, ranked by exploitation relevance.

API	Risk	Why it matters
MmMapIoSpace	critical	Highly dangerous - potential for arbitrary code execution, memory corruption, or process termination
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
KeBugCheckEx	medium	Moderate risk - system modification capability
MmUnmapIoSpace	medium	Moderate risk - system modification capability
IoGetDeviceObjectPointer	medium	Moderate risk - system modification capability
ExAllocatePoolWithTag	low	Standard kernel API - generally benign
IoCreateSymbolicLink	low	Standard kernel API - generally benign
IoDeleteDevice	low	Standard kernel API - generally benign
IoDeleteSymbolicLink	low	Standard kernel API - generally benign
RtlInitUnicodeString	low	Standard kernel API - generally benign
IoCreateDevice	low	Standard kernel API - generally benign
IoBuildDeviceIoControlRequest	low	Standard kernel API - generally benign
IofCompleteRequest	low	Standard kernel API - generally benign
KeInitializeEvent	low	Standard kernel API - generally benign
KeWaitForSingleObject	low	Standard kernel API - generally benign

IOCTL dispatch codes (10)

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
0x00222858	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #2582
0x00222830	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #2572
0x00222834	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #2573
0x0022285C	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #2583
0x00222880	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #2592
0x0080248C	medium	METHOD_BUFFERED	FILE_DEVICE_CUSTOM Function #2339
0x0034035C	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #215
0x0022006C	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #27
0x00220064	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #25

PE sections

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	0x1D88	0x1E00	6.27	CODE, EXEC, READ
.rdata	0x02FC	0x0400	3.64	IDATA, READ
.data	0x0130	0x0200	0.3	IDATA, READ, WRITE
.pdata	0x0108	0x0200	2.19	IDATA, READ
INIT	0x06F0	0x0800	4.93	CODE, EXEC, READ, WRITE, DISCARD
.rsrc	0x03C0	0x0400	3.16	IDATA, READ, DISCARD

Exploit mitigations

Control Flow Guard	Not enabled
ASLR	Not enabled
DEP	Not enabled
Integrity check	Not enforced
Mitigation score	5 / 100

No CFG - Control Flow Guard is not enabled. Indirect call targets are not validated, making the driver susceptible to control flow hijacking via corrupted function pointers or vtables.
No ASLR - ASLR is disabled. The driver loads at a predictable address, enabling reliable exploitation of memory corruption vulnerabilities.
No DEP - DEP is disabled. Data pages are executable, allowing shellcode execution from stack/heap buffers.
Expired Certificate - The driver is signed but the certificate has expired. Windows may still load it depending on revocation policy.

YARA rule matches (4)

Rule	Severity	Detects
PUA_VULN_Driver_Rweverything_Rwdrvsys_Rweverythingreadwritedriver_0AAF	medium	Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - AsrRapidStartDrv.sys. Investigate matches in context: expected filenames or ...
PUA_VULN_Driver_Rweverything_Rwdrvsys_Rweverythingreadwritedriver_2A65	medium	Detects vulnerable driver mentioned in known-vulnerable driver corpus project using VersionInfo values from the PE header - AsrIbDrv.sys
BYOVD_MemRW	critical	Phys memory mapping + device creation
SUSP_PhysMem	high	Physical memory mapping

MITRE ATT&CK techniques (13)

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
T1569.002	Service Execution	Execution
T1652	Device Driver Discovery	Discovery

Code-signing chain

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

Certificate revision: 0x0200
Certificate type: PKCS#7
Chain: VeriSign Time Stamping Services CA
Chain: VeriSign Class 3 Public Primary Certification Authority - G5
Chain: ASROCK Incorporation
Chain: VeriSign Class 3 Code Signing 2010 CA

Symbolic execution

Engine angr, status completed, 30 paths explored at a maximum depth of 30. Vulnerability classes reached: 1. Exploitable paths: 0.

Frequently asked questions about RwDrv.sys

Is RwDrv.sys safe?

Based on DriverShield static and dynamic analysis, RwDrv.sys shows some suspicious signals and warrants manual review. Its composite risk score is 58/100 (verdict: suspicious). Always validate findings independently before acting.

What is the risk score of RwDrv.sys?

RwDrv.sys has a DriverShield composite risk score of 58/100, placing it in the suspicious verdict band. SHA256: 3c5bf92c26398695f9ced7ce647a7e9f6ddcc89eea66b45aa3607196a187431b.

What is RwDrv.sys?

RwDrv.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.