{"DetectionScope":"context-only","ResearchEvidence":{"Id":"96ba5e53-6a40-4813-b6f1-ccce31a883cf","Tags":["xhunter1.sys"],"Verified":"TRUE","Author":"Michael Haag","Created":"2026-06-16","MitreID":"T1562.001","CVE":"CVE-2026-3609","Category":"vulnerable driver","Commands":{"Command":"sc.exe create xhunter1 binPath= C:\\windows\\temp\\xhunter1.sys type= kernel && sc.exe start xhunter1","Description":"Wellbia xhunter1.sys is an XIGNCODE3 anti-cheat kernel component affected by CVE-2026-3609 through version 2023.12.7.78. Public research demonstrates that its unauthenticated command channel can expose protected-process handles, read cross-process memory, terminate security processes, elevate privileges, and inject code from kernel context. Beazley Security also reported this driver family in an INC ransomware affiliate intrusion; the report does not identify the exact sample hash for this family.","Usecase":"Terminate protected processes by abusing vulnerable xhunter1 kernel command paths.","Privileges":"kernel","OperatingSystem":"Windows 10, Windows 11"},"Resources":["https://labs.beazley.security/articles/an-inc-ransomware-affiliates-byovd-buffet","https://github.com/BlackSnufkin/BYOVD/tree/main/Xhunter1-Killer","https://web.archive.org/web/20180820182619/https://x86.re/blog/xigncode3-xhunter1.sys-lpe/","https://blacksnufkin.github.io/posts/Hunting-the-Hunter/","https://github.com/BlackSnufkin/AxHunter","https://www.cve.org/CVERecord?id=CVE-2026-3609"],"Detection":[],"Acknowledgement":{"Person":"BlackSnufkin","Handle":"@BlackSnufkin42"},"KnownVulnerableSamples":[{"Filename":"xhunter1.sys","SHA256":"e727d0753d2cd0b2f6eeba4cea53aa10b3ff3ed2afeb78f545fcf6d840f85c3e","MD5":"c61c16de83acabd35ee18e410c1c37c1","SHA1":"852049ecfd6a42370f2d6ed0d5e67e52c8d88211","Imphash":"49fb0d422e6e128d1184af793f7f8c79","Authentihash":{"MD5":"fab640bd776f3d1098bbc4fb366f1515","SHA1":"5aca2a43c5a9f1fc59bff578e739a8ab8edecc6f","SHA256":"85a3cacfb0eb01fc5784695ccf6bd92a537637ecad747eb162331e78da68eee4"},"RichPEHeaderHash":{"MD5":"1d925fc376773fb63431ac44c280f7b3","SHA1":"040040149603ea0f6dc317b7c1ebc274309b7ba2","SHA256":"6ee450f7bfef5e77fd8c04fc7d82568e83aa57251b7aa6e370e1ec0320440c17"},"Sections":{".text":{"Entropy":6.355870361218269,"Virtual Size":"0x615b"},".rdata":{"Entropy":4.43281138034867,"Virtual Size":"0xc34"},".data":{"Entropy":3.8021598542735324,"Virtual Size":"0x3cf0"},".pdata":{"Entropy":4.3800626807963585,"Virtual Size":"0x5c4"},".gfids":{"Entropy":0.8112781244591328,"Virtual Size":"0x4"},"INIT":{"Entropy":5.2836731808358985,"Virtual Size":"0x934"},".rsrc":{"Entropy":3.5901822862425985,"Virtual Size":"0x428"},".reloc":{"Entropy":5.03169135698492,"Virtual Size":"0x208"}},"MagicHeader":"50 45 0 0","CreationTimestamp":"2018-04-16 02:45:02","Description":"XIGNCODE3 System Guard","Company":"Wellbia.com Co., Ltd.","InternalName":"xhunter1.sys","OriginalFilename":"xhunter1.sys","FileVersion":"10.0.10011.16384","Product":"XIGNCODE3","ProductVersion":"10.0.10011.16384","Copyright":"Copyright (c) 2006-2013 Wellbia.com Co., Ltd.","MachineType":"AMD64","Imports":["ntoskrnl.exe"],"ExportedFunctions":"","ImportedFunctions":["wcsrchr","RtlInitUnicodeString","ExAllocatePoolWithTag","ExFreePoolWithTag","ObReferenceObjectByHandle","ObfDereferenceObject","ZwOpenFile","ZwReadFile","ZwClose","PsGetCurrentProcessId","KeStackAttachProcess","KeUnstackDetachProcess","ZwWaitForSingleObject","ObReferenceObjectByName","ZwQueryInformationProcess","ObSetHandleAttributes","__C_specific_handler","IoDriverObjectType","MmGetSystemRoutineAddress","MmIsAddressValid","PsGetProcessId","PsProcessType","PsThreadType","KeEnterGuardedRegion","KeLeaveGuardedRegion","KeAcquireSpinLockRaiseToDpc","KeReleaseSpinLock","IoGetCurrentProcess","KeSetEvent","ExQueryDepthSList","ExpInterlockedPopEntrySList","ExpInterlockedPushEntrySList","ExInitializeNPagedLookasideList","ExDeleteNPagedLookasideList","IoCreateNotificationEvent","_wcsnicmp","RtlEqualUnicodeString","KeInitializeMutex","KeReleaseMutex","KeWaitForSingleObject","PsSetCreateProcessNotifyRoutine","PsLookupProcessByProcessId","KeInitializeDpc","KeInsertQueueDpc","KeSetImportanceDpc","KeSetTargetProcessorDpc","KeDelayExecutionThread","ExAllocatePool","ProbeForRead","ProbeForWrite","MmProbeAndLockPages","MmUnlockPages","MmMapLockedPagesSpecifyCache","MmUnmapLockedPages","IoAllocateMdl","IoFreeMdl","ZwCreateFile","ZwQueryInformationFile","IoThreadToProcess","ObOpenObjectByPointer","PsLookupProcessThreadByCid","KeNumberProcessors","IofCompleteRequest","IoCreateDevice","IoCreateSymbolicLink","IoDeleteDevice","IoDeleteSymbolicLink","ZwUnloadDriver","_stricmp","ZwQuerySystemInformation","KeBugCheckEx","PsGetVersion"],"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=KR, ST=Seoul, L=Guro,Gu, O=Wellbia.com Co., Ltd., CN=Wellbia.com Co., Ltd.","ValidFrom":"2018-04-12 00:00:00","ValidTo":"2020-05-11 23:59:59","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.11","IsCertificateAuthority":false,"SerialNumber":"1734520c9aabc257a502ec5dbf615354","Version":3,"CertificateType":"Leaf (Code Signing)","IsCodeSigning":true,"IsCA":false,"TBS":{"MD5":"6dee25e9833b43f283c47c8aa7198c70","SHA1":"fc914def7c965d213634d1e95942ac95f9cf47b1","SHA256":"12db45f8d63173d8d41489c6e9f94ea13f922033be01aabde4d5fe002aac4bad","SHA384":"851d3c7c0364cd406199d2057ae41fdef12330f023648d22ea76b930b094d26095ba32d516e73c9cb8d0ce31544ddcb5"}},{"Subject":"C=US, O=Symantec Corporation, OU=Symantec Trust Network, CN=Symantec Class 3 SHA256 Code Signing CA","ValidFrom":"2013-12-10 00:00:00","ValidTo":"2023-12-09 23:59:59","Signature":"13851a1e69a937f7a0bda4af7e1d6153fe9d8c5e0ca6751e781723ddfdec1a035539fb7195c7655aa78e30d2445a61db706fda2105c22e73ba49f1d193fe5dc9cd5e03e0899e3f741ed7f7388ba9d6cfbb352f3358a89256d1c84d3b82e6798416fc28b0b147f31da23eee87d9a67fa456a53fad842e29de7cbca8aaa33d0401eaba93a20e502229174c87e43a115fd6a425899b056b2fb4c9014c277b0bac190522a060153fdac9fb4d4c8ffb726777fd2794c7ba350e8849fe8dfd28af4a12bd0db39705de440c15fa362b03dcc15001f1a1115d14e5e2bd274b54be2b845e0fa6c374050aef97c38922b11f77f3bdcd43d4f14ca93fb58b84af64f2d01421","SignatureAlgorithmOID":"1.2.840.113549.1.1.11","IsCertificateAuthority":true,"SerialNumber":"3d78d7f9764960b2617df4f01eca862a","Version":3,"CertificateType":"CA","IsCodeSigning":true,"IsCA":true,"TBS":{"MD5":"1f056ff7d5f874984dc605402b7cb042","SHA1":"bdb348353a2203deb4b767914fa1bd7248dd728b","SHA256":"a08e79c386083d875014c409c13d144e0a24386132980df11ff59737c8489eb1","SHA384":"fa2729064b49e0d77540c1ee95d5f74acaf8eaf55197851a3a40383335f8113e51190bc48b552196edf8ac5cf0c89278"}},{"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"}}],"Signer":[{"SerialNumber":"1734520c9aabc257a502ec5dbf615354","Issuer":"C=US, O=Symantec Corporation, OU=Symantec Trust Network, CN=Symantec Class 3 SHA256 Code Signing CA","Version":1}]}]},{"Filename":"xhunter1.sys","SHA256":"0d1fd685dc98d0c193529df3ddde7144d839f56b7b38251fd7039c33c0fcf760","MD5":"01d01adc1241c8f0a4caf6764439679c","SHA1":"722a040af40397626f701b7e02ef3a6715c8259a","Imphash":"1b6804e310b6be3b3a4fd962cf3e7973","Authentihash":{"MD5":"1234fcf09d3fd5643e17eaab620a40dc","SHA1":"bd42b25e6cb86e49c1ae0f6c563545c53b9c1c24","SHA256":"12d5000637d3894acd900082f22efd5aa2133b679b1cc145444493e25297f1ee"},"Sections":{".text":{"Entropy":6.986480673253291,"Virtual Size":"0xe268"},".rdata":{"Entropy":3.900119481609735,"Virtual Size":"0xdecc"},".data":{"Entropy":5.15563439109634,"Virtual Size":"0x4170"},".pdata":{"Entropy":7.948146327158821,"Virtual Size":"0xcd8"},"INIT":{"Entropy":5.420108420397148,"Virtual Size":"0xdda"},".~