{"Id":"85f8ad5b-c5aa-468b-99f3-4b0aacfaa724","Author":"Michael Haag","Created":"2025-08-08","MitreID":"T1068","Category":"vulnerable driver","Verified":"TRUE","Commands":{"Command":"sc.exe create cyvrlpc.sys binPath=C:\\windows\\temp\\cyvrlpc.sys type=kernel && sc.exe start cyvrlpc.sys","Description":"Per Sophos X-Ops research\n(Aug 06, 2025), threat actors deploy an EDR-killer that loads a malicious\nkernel driver (often with a random five-letter name) signed with\ncompromised or revoked code-signing certificates (e.g., Changsha Hengxiang\nInformation Technology; Fuzhou Dingxin Trade). The tool targets many\nsecurity products by killing their services and processes and is frequently\ndistributed packed with HeartCrypt by ransomware groups (e.g., RansomHub,\nINC). Driver names are hard-coded per sample (e.g., mraml.sys, noedt.sys).\n","Usecase":"Elevate privileges","Privileges":"kernel","OperatingSystem":"Windows 10"},"Resources":["https://news.sophos.com/en-us/2025/08/06/shared-secret-edr-killer-in-the-kill-chain/"],"Acknowledgement":{"Person":"Michael Haag","Handle":"m_haggis"},"Detection":[],"KnownVulnerableSamples":[{"Filename":"05f8f514d1367aca856564af5443a75f47d22a30ce63f0b024a41e6b9553a527","MD5":"43e12d7695fb568b5fce049341ae9175","SHA1":"6b76184d186d93cef98df43f1e307eb2ab866c1b","SHA256":"05f8f514d1367aca856564af5443a75f47d22a30ce63f0b024a41e6b9553a527","Filesize":2105856,"Signature":"","Date":"","Publisher":"","Company":"Palo Alto Networks, Inc.","Description":"Cortex XDR LPC Driver","Product":"Cortex XDR™ Advanced Endpoint Protection","ProductVersion":"8.2.2.49708","FileVersion":"8.2.2.49708","MachineType":"AMD64","OriginalFilename":"cyvrlpc.sys","InternalName":"cyvrlpc.sys","Copyright":"© Palo Alto Networks, Inc. All rights reserved","Imports":["ntoskrnl.exe","HAL.dll","ntoskrnl.exe","HAL.dll"],"ExportedFunctions":"","ImportedFunctions":["KeInitializeEvent","HalReturnToFirmware","ExAllocatePool","NtQuerySystemInformation","ExFreePoolWithTag","IoAllocateMdl","MmProbeAndLockPages","MmMapLockedPagesSpecifyCache","MmUnlockPages","IoFreeMdl","KeQueryActiveProcessors","KeSetSystemAffinityThread","KeRevertToUserAffinityThread","DbgPrint","KeQueryPerformanceCounter"],"PDBPath":"","Authentihash":{"MD5":"c39d7606489fa399976e2f18373b3e24","SHA1":"ebf6b77266869267e01671eba82f24497954f1f4","SHA256":"44c718f75ae2a58e22923644d0caa621d78e8b83fe239d3c1bbba8851274904f"},"Imphash":"ce10082e1aa4c1c2bd953b4a7208e56a","RichPEHeaderHash":{"MD5":"ffdf660eb1ebf020a1d0a55a90712dfb","SHA1":"3e905e3d061d0d59de61fcf39c994fcb0ec1bab3","SHA256":"2b3f99a94b7a7132854be769e27b331419c53989ef42f686d6f5ba09ddefefd6"},"Sections":{".text":{"Entropy":0,"Virtual Size":"0x26e8"},".rdata":{"Entropy":0,"Virtual Size":"0x6ac"},".data":{"Entropy":0,"Virtual Size":"0x98"},".pdata":{"Entropy":0,"Virtual Size":"0x198"},"INIT":{"Entropy":0,"Virtual Size":"0x5b4"},".?mW":{"Entropy":0,"Virtual Size":"0xf9b82"},".rr)":{"Entropy":0.7768003667231973,"Virtual Size":"0x290"},".k:-":{"Entropy":7.7579740680833,"Virtual Size":"0x1ffd78"},".reloc":{"Entropy":3.3561335216142396,"Virtual Size":"0x64"},".rsrc":{"Entropy":3.3825510566470958,"Virtual Size":"0x4d8"}},"MagicHeader":"50 45 0 0","CreationTimestamp":"2023-06-23 11:18:09","Signatures":[{"CertificatesInfo":"","SignerInfo":"","Certificates":[{"Subject":"CN=长沙恒祥信息技术有限公司,O=长沙恒祥信息技术有限公司,L=长沙市,ST=湖南省,C=CN","ValidFrom":"2015-03-20 00:00:00","ValidTo":"2016-03-19 23:59:59","Signature":"ca84c8ad3a1c9e9b8bfe2e19f98d222c970dcd9db773e56d964090656869bd15920e174b7bb29636f6a8ea72f0ea0f577cf75d763fa291dd31c575fcd35ced7fc52ef7dee9af0567ff60e8645b97b33ec06789f992b541c8cccc80975476a51c7bdeacb9a80527e769bb336d1a5ba0da5137b67e8d18fb218a95e5523465a5deff0c8905850e430d354420456c06664078e42d97b25fde7e524a907258477ea725c1c227131d03d308a55a7aba8d4a49a4ca7c5325454d24ed90d3d15888ea27574014a33bf51fd84cf55d941c845503155864cea2d89b3f0f57ac8227926d2c27b0a8157918bfe9d9da123de7d6b051cac51acf19e99f4f14978dfafd321cf7","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":false,"SerialNumber":"75e8e7b9043b13df60e76499663021c1","Version":3,"CertificateType":"Leaf (Code Signing)","IsCodeSigning":true,"IsCA":false,"TBS":{"MD5":"c744e90982da6083d0d56173dba4c9fa","SHA1":"633b38d9372b85e02e013beca47cf5b1b7b10bee","SHA256":"09a47ae5b166910e92028c035d2550ccec79b4c9b221bc476380ddb69b5b4770","SHA384":"240cbfa8fdb38172da35d1f761200717e8824a6eb58cf2be0421e825fc7ddf5c62a93136a6f844af06d2c5779d80841a"}},{"Subject":"CN=VeriSign Class 3 Public Primary Certification Authority , G5,OU=(c) 2006 VeriSign, Inc. , For authorized use only,OU=VeriSign Trust Network,O=VeriSign, Inc.,C=US","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":"CN=VeriSign Class 3 Code Signing 2010 CA,OU=Terms of use at https://www.verisign.com/rpa (c)10,OU=VeriSign Trust Network,O=VeriSign, Inc.,C=US","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":"75e8e7b9043b13df60e76499663021c1","Issuer":"CN=VeriSign Class 3 Code Signing 2010 CA,OU=Terms of use at https://www.verisign.com/rpa (c)10,OU=VeriSign Trust Network,O=VeriSign, Inc.,C=US","Version":1}]}]}],"Tags":["cyvrlpc.sys"]}