{"Id":"a6dd3aef-d3a7-4c72-abcd-e633e0c0706c","Tags":["kdhacker64_ev.sys"],"Verified":"TRUE","Author":"Michael Haag","Created":"2026-04-13","MitreID":"T1068","Category":"vulnerable driver","Commands":{"Command":"sc.exe create KDHacker binPath=C:\\windows\\temp\\kdhacker64_ev.sys type=kernel && sc.exe start KDHacker","Description":"kdhacker64_ev.sys is a kernel driver from Beijing Kingsoft Security software bundled with Kingsoft AntiVirus and Liebao Browser. The driver exposes a kernel heap buffer overflow via IOCTL 0x120140 with approximately 512 bytes of overflow into adjacent kernel pool allocations. The root cause is a size validation mismatch -- input is validated at 0x488 bytes per element but only 0x248 bytes are allocated per element. RtlInitUnicodeString is called on user-controlled buffers without null terminator bounds checking, producing oversized ANSI strings that overflow 64-byte destination buffers. No authentication is required to access the device. The driver also includes TDI hooks for TCP/UDP/RawIP interception, process creation notification callbacks, filesystem filter attachments to NTFS/FAT/CDFS, camera device monitoring, and HTTP header parsing. Other Kingsoft drivers (ksapi.sys, mydrivers.sys) are already tracked in LOLDrivers.","Usecase":"Elevate privileges","Privileges":"kernel","OperatingSystem":"Windows 10"},"Resources":["https://github.com/magicsword-io/LOLDrivers/issues/309"],"Detection":[],"Acknowledgement":{"Person":"Patrick Saif","Handle":"@weezerOSINT"},"KnownVulnerableSamples":[{"Filename":"kdhacker64_ev.sys","MD5":"ba3cd54ee9e5bde6f4155348e8c6e31a","SHA1":"881b7b87284ea81d88ac2f8c6c3c5a19b786b3ef","SHA256":"597eff2718073b11da3d4bcade9a03fb4684f9be57d184fce65ac70a2ef07246","Signature":"","Date":"","Publisher":"","Company":"Kingsoft Corporation","Description":"Kingsoft Firewall TdiFilter Driver","Product":"Kingsoft Internet Security","ProductVersion":"9,3,312876,367","FileVersion":"2017,07,03,367","MachineType":"AMD64","OriginalFilename":"ktdifilt.sys","Authentihash":{"MD5":"ce514a135d2f04b72bb4405f0e1d6229","SHA1":"55954405254649b08814128e7f4b586396d5297a","SHA256":"9d49c2dbbfecf36aec181b93ff33956edd705a23a771401683293ff7e5d77ac0"},"RichPEHeaderHash":{"MD5":"ccb32d71348b94240a785f91d3ca25b2","SHA1":"c10290dcaa8c4584c1955d66fd7793813e8bf4a1","SHA256":"610c44fb821ffd3e5bc9093a208aa7edbba0167f5f5be8ea19ca84ff1ba361fa"},"Sections":{".text":{"Entropy":5.467132678500833,"Virtual Size":"0x26a20"},".rdata":{"Entropy":4.630829690391067,"Virtual Size":"0x1a68"},".data":{"Entropy":3.4202103831068573,"Virtual Size":"0x7cc"},".pdata":{"Entropy":5.14714605370414,"Virtual Size":"0x1adc"},"PAGE":{"Entropy":5.256672768531553,"Virtual Size":"0xc32"},"INIT":{"Entropy":5.463136100121643,"Virtual Size":"0xf52"},".rsrc":{"Entropy":3.3343602089085356,"Virtual Size":"0x3d0"},".reloc":{"Entropy":2.146502323368273,"Virtual Size":"0x28c"}},"MagicHeader":"50 45 0 0","CreationTimestamp":"2017-07-03 00:46:27","InternalName":"KTdiFilt","Copyright":"Copyright (C) 1998-2017 Kingsoft Corporation","Imports":["ntoskrnl.exe","TDI.SYS"],"ExportedFunctions":"","ImportedFunctions":["DbgPrint","ZwCreateKey","IoAttachDevice","ZwSetValueKey","IoDeleteDevice","ZwFlushKey","IoDetachDevice","IoAttachDeviceToDeviceStack","IofCompleteRequest","KeQueryTimeIncrement","IofCallDriver","_stricmp","RtlCompareMemory","wcslen","_wcsnicmp","ZwCreateFile","ZwQueryInformationFile","KeSetEvent","KeInitializeEvent","RtlInitUnicodeString","ZwOpenKey","ZwClose","ExAllocatePool","KeWaitForSingleObject","ObQueryNameString","ZwQueryValueKey","RtlCopyUnicodeString","ExFreePoolWithTag","ObReferenceObjectByHandle","KeAcquireSpinLockRaiseToDpc","KeReleaseSpinLock","RtlUnicodeStringToAnsiString","RtlFreeAnsiString","strlen","_strlwr","MmIsAddressValid","ExAllocatePoolWithTag","ExInitializeResourceLite","ExDeleteResourceLite","ExInterlockedRemoveHeadList","KeEnterCriticalRegion","ExAcquireResourceSharedLite","ExReleaseResourceLite","KeLeaveCriticalRegion","ExAcquireResourceExclusiveLite","InitSafeBootMode","wcscpy","_wcsupr","strcpy","_strupr","_vsnwprintf","RtlCompareUnicodeString","ZwOpenDirectoryObject","ZwQueryDirectoryObject","_wcsicmp","wcscat","ObReferenceObjectByName","ObfDereferenceObject","MmGetSystemRoutineAddress","IoGetAttachedDeviceReference","PsGetCurrentProcessId","PsGetCurrentThreadId","PoStartNextPowerIrp","PoCallDriver","wcsncpy","strncpy","IoWMIWriteEvent","RtlQueryRegistryValues","RtlStringFromGUID","RtlFreeUnicodeString","IoWMIRegistrationControl","IoCreateSymbolicLink","IoRegisterShutdownNotification","PsSetCreateProcessNotifyRoutine","PsGetVersion","IoUnregisterShutdownNotification","IoDeleteSymbolicLink","IoGetTopLevelIrp","wcsncmp","KeDelayExecutionThread","ExInitializeNPagedLookasideList","PsCreateSystemThread","ExpInterlockedPopEntrySList","ExpInterlockedPushEntrySList","ExQueryDepthSList","ExDeleteNPagedLookasideList","ExInterlockedInsertTailList","KeReleaseSemaphore","ExGetPreviousMode","IoFreeMdl","IoAllocateMdl","MmBuildMdlForNonPagedPool","IoBuildDeviceIoControlRequest","ExInterlockedAddLargeInteger","_strnicmp","strcat","MmMapLockedPagesSpecifyCache","PsLookupProcessByProcessId","IoRegisterFsRegistrationChange","IoUnregisterFsRegistrationChange","ExQueueWorkItem","ZwOpenSymbolicLinkObject","ZwQuerySymbolicLinkObject","MmMapLockedPages","MmProbeAndLockPages","MmUnlockPages","ExAcquireFastMutex","ExReleaseFastMutex","ZwWriteFile","ZwSetInformationFile","RtlVolumeDeviceToDosName","IoGetCurrentProcess","wcsrchr","IoDriverObjectType","IoCreateDevice","__C_specific_handler","TdiMapUserRequest"],"Signatures":[{"CertificatesInfo":"","SignerInfo":"","Certificates":[{"Subject":"C=US, O=Symantec Corporation, CN=Symantec Time Stamping Services CA , G2","ValidFrom":"2012-12-21 00:00:00","ValidTo":"2020-12-30 23:59:59","Signature":"03099b8f79ef7f5930aaef68b5fae3091dbb4f82065d375fa6529f168dea1c9209446ef56deb587c30e8f9698d23730b126f47a9ae3911f82ab19bb01ac38eeb599600adce0c4db2d031a6085c2a7afce27a1d574ca86518e979406225966ec7c7376a8321088e41eaddd9573f1d7749872a16065ea6386a2212a35119837eb6","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":true,"SerialNumber":"7e93ebfb7cc64e59ea4b9a77d406fc3b","Version":3,"CertificateType":"CA","IsCodeSigning":false,"IsCA":true,"TBS":{"MD5":"d0785ad36e427c92b19f6826ab1e8020","SHA1":"365b7a9c21bd9373e49052c3e7b3e4646ddd4d43","SHA256":"c2abb7484da91a658548de089d52436175fdb760a1387d225611dc0613a1e2ff","SHA384":"eab4fe5ef90e0de4a6aa3a27769a5e879f588df5e4785aa4104debd1f81e19ea56d33e3a16e5facf99f68b5d8e3d287b"}},{"Subject":"C=US, O=Symantec Corporation, CN=Symantec Time Stamping Services Signer , G4","ValidFrom":"2012-10-18 00:00:00","ValidTo":"2020-12-29 23:59:59","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":false,"SerialNumber":"0ecff438c8febf356e04d86a981b1a50","Version":3,"CertificateType":"Intermediate","IsCodeSigning":false,"IsCA":false,"TBS":{"MD5":"e9d38360b914c8863f6cba3ee58764d3","SHA1":"4cba8eae47b6bf76f20b3504b98b8f062694a89b","SHA256":"88901d86a4cc1f1bb193d08e1fb63d27452e63f83e228c657ab1a92e4ade3976","SHA384":"e9f2a75334a9e336c5a4712eadee88d0374b0fdc273262f4e65c9040ad2793067cc076696db5279a478773485e285652"}},{"Subject":"C=CN, ST=Beijing, L=Beijing, O=Beijing Kingsoft Security software Co.,Ltd, OU=IT, CN=Beijing Kingsoft Security software Co.,Ltd","ValidFrom":"2017-02-17 00:00:00","ValidTo":"2019-03-19 23:59:59","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":false,"SerialNumber":"4c6d7b5ea289c274426434e65b417aba","Version":3,"CertificateType":"Leaf (Code Signing)","IsCodeSigning":true,"IsCA":false,"TBS":{"MD5":"926f275e20569cb88069ecd4cc0a94bf","SHA1":"5d767ae1c6d051b4872bb020faed9b867b8b589c","SHA256":"79f52876b273ad0c7ee45c5d7298651797f9f5eb37d5916f7f79a9b404373e4e","SHA384":"ad0c57d8fced327ff5b5c6ab55a473e77229368cf866c39ca7a58222e3f3a0883bd39c86182d026c7c30c7baa14d9802"}},{"Subject":"C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=(c) 2006 VeriSign, Inc. , For authorized use only, CN=VeriSign Class 3 Public Primary Certification Authority , G5","ValidFrom":"2011-02-22 19:25:17","ValidTo":"2021-02-22 19:35:17","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":true,"SerialNumber":"611993e400000000001c","Version":3,"CertificateType":"CA","IsCodeSigning":false,"IsCA":true,"TBS":{"MD5":"78a717e082dcc1cda3458d917e677d14","SHA1":"4a872e0e51f9b304469cd1dedb496ee9b8b983a4","SHA256":"317fa1d234ebc49040ebc5e8746f8997471496051b185a91bdd9dfbb23fab5f8","SHA384":"b71052da4eb9157c8c1a5d7f55df19d69b9128598b72fcca608e5b7cc7d64c43c5504b9c86355a6dc22ee40c88cc385c"}},{"Subject":"C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=Terms of use at https://www.verisign.com/rpa (c)10, CN=VeriSign Class 3 Code Signing 2010 CA","ValidFrom":"2010-02-08 00:00:00","ValidTo":"2020-02-07 23:59:59","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":true,"SerialNumber":"5200e5aa2556fc1a86ed96c9d44b33c7","Version":3,"CertificateType":"CA","IsCodeSigning":true,"IsCA":true,"TBS":{"MD5":"b30c31a572b0409383ed3fbe17e56e81","SHA1":"4843a82ed3b1f2bfbee9671960e1940c942f688d","SHA256":"03cda47a6e654ed85d932714fc09ce4874600eda29ec6628cfbaeb155cab78c9","SHA384":"bbda8407c4f9fc4e54d772f1c7fb9d30bc97e1f97ecd51c443063d1fa0644e266328781776cd5c44896c457c75f4d7da"}}],"Signer":[{"SerialNumber":"4c6d7b5ea289c274426434e65b417aba","Issuer":"C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=Terms of use at https://www.verisign.com/rpa (c)10, CN=VeriSign Class 3 Code Signing 2010 CA","Version":1}]}],"LoadsDespiteHVCI":"FALSE","Imphash":"c15e287657486d03f28019eaddc0718e"}]}