71d930a7-3465-4d27-90d4-2a1a08bebb92

RtsUer.sys

Description

The Realtek SD card reader driver, RtsUer.sys, versions below or equal to 10.0.22000.31273 contain multiple vulnerabilities that pose significant security risks. These flaws allow non-privileged users to write to kernel memory and access the DMA controller from unprivileged accounts, potentially enabling privilege escalation and system compromise. The most severe issues include the ability to write to kernel memory and access the DMA controller, which could lead to unauthorized system modifications. These vulnerabilities affect various Realtek SD card reader models used by major OEM laptop manufacturers. Due to the widespread use of this driver, the impact is considerable, potentially affecting a large number of systems across different brands. Users with laptops equipped with Realtek SD card readers should ensure their drivers are updated to a version higher than 10.0.22000.31273 to mitigate these security risks.

UUID: 71d930a7-3465-4d27-90d4-2a1a08bebb92
Created: 2024-09-10
Author: Michael M.
Acknowledgement: |

Download Block

This download link contains the vulnerable driver!

Commands

sc.exe create RtsUer.sys binPath=C:\windows\temp\RtsUer.sys type=kernel &amp;&amp; sc.exe start RtsUer.sys

Use Case	Privileges	Operating System
Elevate privileges	kernel	Windows 10

Detections

YARA 🏹

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Exact Match

with header and size limitation

Threat Hunting

without header and size limitation

Renamed

for renamed driver files

Sigma 🛡️

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Names

detects loading using name only

Hashes

detects loading using hashes only

Sysmon 🔎

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Block

on hashes

Alert

on hashes

Resources

https://www.linkedin.com/pulse/vulnerabilities-realtek-sd-card-reader-driver-part-1-myngerbayev-czqmf, https://github.com/zwclose/realteksd

Known Vulnerable Samples

Property	Value
Filename
Creation Timestamp	2021-12-17 02:20:30
MD5	11966f98a92e039f1d14689538cccd99
SHA1	9ae0c6d1612a84e664c9896fafcc50232831f630
SHA256	39171fcaff172d6b38762acef3d3352f9a375e3db7e54a7b51261a53b3c94266
Authentihash MD5	63485bea17db891ce3c16c2b24e947b5
Authentihash SHA1	f4f5efe24ab8119e1fe4a9d62c0f153b1fb6d42c
Authentihash SHA256	0f78dd64abcb5a3e1d60f9e9c92422f34a52e009770e6434d2d8aabb6d370737
RichPEHeaderHash MD5	23a6d4678f3d9899c904995daa9e68b4
RichPEHeaderHash SHA1	8b24c38e0d2cc16c82d987526815a41be61b414a
RichPEHeaderHash SHA256	9bff0d505a98a035c3186285f9d347fe22240f0793217f0f1affba9a9d2718ac
Company	Realsil Semiconductor Corporation
Description	RTS USB READER Driver
Product	Windows (R) Win 7 DDK driver
OriginalFilename	RTSUER.SYS

Download

Certificates

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Certificate 08ad40b260d29c4c9f5ecda9bd93aed9

Field	Value
ToBeSigned (TBS) MD5	5d8003a64dfa5a4d88365da1566038cb
ToBeSigned (TBS) SHA1	79465b56bc7ad55a37bdf633943da8bfc84db228
ToBeSigned (TBS) SHA256	84bdc82e2f2a7f7aaa782667dac556ffcb2b33240c1f9c0a00a3264526a98332
Subject	C=US, O=DigiCert, Inc., CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1
ValidFrom	2021-04-29 00:00:00
ValidTo	2036-04-28 23:59:59
Signature	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
SignatureAlgorithmOID	1.2.840.113549.1.1.12
IsCertificateAuthority	True
SerialNumber	08ad40b260d29c4c9f5ecda9bd93aed9
Version	3

Certificate 05101d15d8f858ee5327dc9bf4b5e60b

Field	Value
ToBeSigned (TBS) MD5	c1b9c90ceda4e9618acdd67d666e6e65
ToBeSigned (TBS) SHA1	7eaa35bb031c66efb03060247524666adef774e4
ToBeSigned (TBS) SHA256	6f3f9fd2fb30731e281c4bd92bb2e37119d4d8d10d34f6f260ae5481456bdfd4
Subject	??=Private Organization, ??=TW, serialNumber=22671299, C=TW, L=HSINCHU, O=Realtek Semiconductor Corp., CN=Realtek Semiconductor Corp.
ValidFrom	2021-07-15 00:00:00
ValidTo	2022-01-13 23:59:59
Signature	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
SignatureAlgorithmOID	1.2.840.113549.1.1.11
IsCertificateAuthority	False
SerialNumber	05101d15d8f858ee5327dc9bf4b5e60b
Version	3

Imports

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USBD.SYS
ntoskrnl.exe
HAL.DLL

Imported Functions

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USBD_CreateConfigurationRequestEx
USBD_ParseConfigurationDescriptorEx
KeReleaseSemaphore
KeWaitForSingleObject
ExRaiseStatus
ProbeForWrite
MmProbeAndLockPages
MmMapLockedPagesSpecifyCache
IoAllocateMdl
IofCallDriver
IofCompleteRequest
IoFreeMdl
IoIs32bitProcess
IoCsqInsertIrp
__C_specific_handler
KeAcquireSpinLockRaiseToDpc
KeReleaseSpinLock
_vsnprintf
RtlInitUnicodeString
MmGetSystemRoutineAddress
KeInitializeEvent
KeClearEvent
KeSetEvent
IoAllocateWorkItem
IoFreeWorkItem
IoQueueWorkItem
PoRequestPowerIrp
PoFxSetDeviceIdleTimeout
RtlUnicodeStringToInteger
RtlInitAnsiString
RtlQueryRegistryValues
RtlAnsiStringToUnicodeString
RtlFreeUnicodeString
RtlCompareMemory
KeReleaseMutex
KeDelayExecutionThread
IoBuildSynchronousFsdRequest
IoDeleteDevice
IoGetDeviceProperty
IoOpenDeviceRegistryKey
ObReferenceObjectByHandle
ObfDereferenceObject
ZwClose
ExAllocatePoolWithTag
ZwOpenKey
ZwDeleteKey
ZwDeleteValueKey
ZwEnumerateKey
ZwFlushKey
ZwQueryValueKey
ZwSetValueKey
memcmp
wcscmp
wcsstr
KeInitializeMutex
KeInitializeSemaphore
IoAttachDeviceToDeviceStack
IoCreateDevice
IoDetachDevice
IoRegisterShutdownNotification
IoCsqInitialize
IoRegisterDeviceInterface
IoAllocateIrp
IoBuildDeviceIoControlRequest
IoFreeIrp
IoGetAttachedDeviceReference
IoUnregisterShutdownNotification
IoSetDeviceInterfaceState
PoSetPowerState
ObfReferenceObject
IoCancelIrp
PoCallDriver
PoStartNextPowerIrp
KeWaitForMultipleObjects
PsCreateSystemThread
PsTerminateSystemThread
IoCsqRemoveNextIrp
IoInvalidateDeviceRelations
MmUnlockPages
MmBuildMdlForNonPagedPool
IoWMIOpenBlock
IoWMIQueryAllData
RtlTimeToTimeFields
ExSystemTimeToLocalTime
ExFreePoolWithTag
ZwCreateKey
IoGetRequestorProcessId
RtlGetVersion
wcscat_s
wcscpy_s
ObQueryNameString
swprintf_s
_vsnwprintf
ExUuidCreate
strncpy_s
PsGetVersion
ExAllocatePoolWithQuotaTag
ZwQuerySystemInformation
KeStallExecutionProcessor

Exported Functions

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Sections

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.text
.rdata
.data
.pdata
PAGE
INIT
.rsrc
.reloc

Signature

Expand

{
  "Certificates": [
    {
      "IsCertificateAuthority": true,
      "SerialNumber": "08ad40b260d29c4c9f5ecda9bd93aed9",
      "Signature": "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",
      "SignatureAlgorithmOID": "1.2.840.113549.1.1.12",
      "Subject": "C=US, O=DigiCert, Inc., CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1",
      "TBS": {
        "MD5": "5d8003a64dfa5a4d88365da1566038cb",
        "SHA1": "79465b56bc7ad55a37bdf633943da8bfc84db228",
        "SHA256": "84bdc82e2f2a7f7aaa782667dac556ffcb2b33240c1f9c0a00a3264526a98332",
        "SHA384": "65b1d4076a89ae273f57e6eeedecb3eae129b4168f76fa7671914cdf461d542255c59d9b85b916ae0ca6fc0fcf7a8e64"
      },
      "ValidFrom": "2021-04-29 00:00:00",
      "ValidTo": "2036-04-28 23:59:59",
      "Version": 3
    },
    {
      "IsCertificateAuthority": false,
      "SerialNumber": "05101d15d8f858ee5327dc9bf4b5e60b",
      "Signature": "151048dc9ff0e31ea762d2448203360d71a4b8c54f7718b1e812acb6afef4975711bdbdc87425479d93554c9d8267c73511dd87d333c913c1236c1c757fdb3295f5d7c0c6170e3aceee359a99671d587b0b771966eec4f190ffe58941812dc269054705a599efcbdad02e1bbd3ba80f1e63008317dab04fc8acf431120e96a55de3fb7860e2aa49520abf426488f69754048b7bcdcf638b5a1d1c1f4cda2076c3068aefb40deec5ead04e57f1037b6d89ce205adeb4f3741dcb936ec195ffdcd9f8c95d2158784b2757b19ec6146d2f54e4d9dbe2e88df94d310413659b15e0a884c88371ff4f2c6378299994d2c081bfb49cb50fc36773f42d0808ba0aebd9f7f4d9b17e68f70bd30c8116c6f76cfabd23770abbe60a9b9d1d315f9f4f34f2636f73bd9451af7929621e36145fac35091d2653901cf5e578cd8a0295ef6ce25a6f7bc975a9b800712f75eef729ce0ab5ebe86668b5c80ea76ee9c74ce0ce1dc4f840d3a1299718ffc24077baa260298221fa9492fd8dbdf01ebd18e9cd7a44d0818bb38432624e6ce766334e5a6898352b096fb067a943df3f1921656bc33bbd91335e6419f5beb3e36afb826b3e76219554b819ae3f546e1da129f9aafa6ec3573594879a606f11be7bb739989c6ea797baebe7a39e9579404bdf1cb05ab93fefd0fde80057aefeaabe932e2cedfa14b9076f79027d4be8f863b4eae9713a4",
      "SignatureAlgorithmOID": "1.2.840.113549.1.1.11",
      "Subject": "??=Private Organization, ??=TW, serialNumber=22671299, C=TW, L=HSINCHU, O=Realtek Semiconductor Corp., CN=Realtek Semiconductor Corp.",
      "TBS": {
        "MD5": "c1b9c90ceda4e9618acdd67d666e6e65",
        "SHA1": "7eaa35bb031c66efb03060247524666adef774e4",
        "SHA256": "6f3f9fd2fb30731e281c4bd92bb2e37119d4d8d10d34f6f260ae5481456bdfd4",
        "SHA384": "a59e3d9c053618b9081d72e4764a64b811d9927a35cb96f314ad19635405ac3c3a05e29fa592fa2b59db1fd1a16a09da"
      },
      "ValidFrom": "2021-07-15 00:00:00",
      "ValidTo": "2022-01-13 23:59:59",
      "Version": 3
    }
  ],
  "CertificatesInfo": "",
  "Signer": [
    {
      "Issuer": "C=US, O=DigiCert, Inc., CN=DigiCert Trusted G4 Code Signing RSA4096 SHA384 2021 CA1",
      "SerialNumber": "05101d15d8f858ee5327dc9bf4b5e60b",
      "Version": 1
    }
  ],
  "SignerInfo": ""
}

source

last_updated: 2025-01-13