{"DetectionScope":"context-only","ResearchEvidence":{"Id":"5901421f-7929-487d-87bd-632f29290352","Tags":["VdBSv64.sys"],"Verified":"TRUE","Author":"Takahiro Haruyama","Created":"2023-11-02","MitreID":"T1068","Category":"vulnerable driver","Commands":{"Command":"sc.exe create VdBSv64sys binPath= C:\\windows\\temp\\VdBSv64sys.sys type=kernel && sc.exe start VdBSv64sys","Description":"The Carbon Black Threat Analysis Unit (TAU) discovered 34 unique vulnerable drivers (237 file hashes) accepting firmware access. Six allow kernel memory access. All give full control of the devices to non-admin users. By exploiting the vulnerable drivers, an attacker without the system privilege may erase/alter firmware, and/or elevate privileges. As of the time of writing in October 2023, the filenames of the vulnerable drivers have not been made public until now.","OperatingSystem":"Windows 10","Privileges":"kernel","Usecase":"Elevate privileges"},"Resources":["https://blogs.vmware.com/security/2023/10/hunting-vulnerable-kernel-drivers.html"],"Detection":[{"type":"yara_signature","value":"https://github.com/magicsword-io/LOLDrivers/blob/main/detections/yara/yara-rules_vuln_drivers_strict_renamed.yar"},{"type":"sigma_hash","value":"https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sigma/driver_load_win_vuln_drivers.yml"},{"type":"sigma_names","value":"https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sigma/driver_load_win_vuln_drivers_names.yml"},{"type":"sysmon_hash_detect","value":"https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sysmon/sysmon_config_vulnerable_hashes.xml"},{"type":"sysmon_hash_block","value":"https://github.com/magicsword-io/LOLDrivers/blob/main/detections/sysmon/sysmon_config_vulnerable_hashes_block.xml"}],"Acknowledgement":{"Handle":"","Person":""},"KnownVulnerableSamples":[{"Company":"MiTAC Technology Corporation","Date":"","Description":"MiTAC System Service Provider","FileVersion":"21, 1, 1, 0","Filename":"","MD5":"4353b713487a2945b823423bbbf709bd","MachineType":"AMD64","OriginalFilename":"VdBSv64.sys","Product":"MiTAC System Service Provider","ProductVersion":"21, 1, 1, 0","Publisher":"","SHA1":"4ffa89f8dbdade28813e12db035cf9bd8665ef72","SHA256":"91afa3de4b70ee26a4be68587d58b154c7b32b50b504ff0dc0babc4eb56578f4","Signature":"","Imphash":"9523103b30fb194643b97ccc3ab7abb0","Authentihash":{"MD5":"16f4705fc75a0769f46b2d1745240aad","SHA1":"52da22f92d5d022eaae66ef9e5ebca7ef27b674d","SHA256":"d2da77e10d2fd2b8b2aa68ab4af1483ef270311c846644e0ec61ace146ee6feb"},"RichPEHeaderHash":{"MD5":"43a480628499054a660e90855d10145f","SHA1":"e8a0d07090bd1290ef7ac69969f325f6cb74fa0a","SHA256":"55900664a6be8d7981c6ce2236870f5576a0d01d18b0d40f0b1f50d6f2de6b30"},"Sections":{".text":{"Entropy":6.537004459207361,"Virtual Size":"0x22d0"},".rdata":{"Entropy":5.074604634830452,"Virtual Size":"0xaa0"},".data":{"Entropy":2.126592634957593,"Virtual Size":"0x430"},".pdata":{"Entropy":3.926224846841215,"Virtual Size":"0x180"},"PAGE":{"Entropy":5.850620166824451,"Virtual Size":"0x6a4"},"INIT":{"Entropy":5.329381958602971,"Virtual Size":"0x386"},".rsrc":{"Entropy":3.3520653582370166,"Virtual Size":"0x3c8"},".reloc":{"Entropy":3.6294909850169517,"Virtual Size":"0x102"}},"MagicHeader":"50 45 0 0","CreationTimestamp":"2009-07-23 03:42:31","InternalName":"VdBSv64.sys","Copyright":"Copyright (C) 2007 MiTAC Technology Corporation","Imports":["ntoskrnl.exe"],"ExportedFunctions":"","ImportedFunctions":["IofCompleteRequest","KeInitializeMutex","KeWaitForSingleObject","KeReleaseMutex","RtlInitUnicodeString","IoDeleteDevice","IoCreateSymbolicLink","KeSetEvent","KeClearEvent","IoCreateDevice","ExInterlockedInsertTailList","KeInitializeEvent","MmUnmapIoSpace","MmMapIoSpace","RtlTimeToTimeFields","ExAllocatePool","KeBugCheckEx","DbgPrint","RtlUnicodeToMultiByteN"],"Signatures":[{"CertificatesInfo":"","SignerInfo":"","Certificates":[{"Subject":"C=US, O=VeriSign, Inc., CN=VeriSign Time Stamping Services Signer , G2","ValidFrom":"2007-06-15 00:00:00","ValidTo":"2012-06-14 23:59:59","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":false,"SerialNumber":"3825d7faf861af9ef490e726b5d65ad5","Version":3,"CertificateType":"Intermediate","IsCodeSigning":false,"IsCA":false,"TBS":{"MD5":"d6c7684e9aaa508cf268335f83afe040","SHA1":"18066d20ad92409c567cdfde745279ff71c75226","SHA256":"a612fb22ce8be6dab75e47c98508f98496583e79c9c97b936a8caee9ea9f3fff","SHA384":"35c249d6ad0261a6229b2a727067ac6ba32a5d24b30b9249051f748c7735fbe2ec2ef26a702c50df1790fbe32a65aee7"}},{"Subject":"C=US, O=VeriSign, Inc., CN=VeriSign Time Stamping Services CA","ValidFrom":"2003-12-04 00:00:00","ValidTo":"2013-12-03 23:59:59","Signature":"4a6bf9ea58c2441c318979992b96bf82ac01d61c4ccdb08a586edf0829a35ec8ca9313e704520def47272f0038b0e4c9934e9ad4226215f73f37214f703180f18b3887b3e8e89700fecf55964e24d2a9274e7aaeb76141f32acee7c9d95eddbb2b853eb59db5d9e157ffbeb4c57ef5cf0c9ef097fe2bd33b521b1b3827f73f4a","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":true,"SerialNumber":"47bf1995df8d524643f7db6d480d31a4","Version":3,"CertificateType":"CA","IsCodeSigning":false,"IsCA":true,"TBS":{"MD5":"518d2ea8a21e879c942d504824ac211c","SHA1":"21ce87d827077e61abddf2beba69fde5432ea031","SHA256":"1ec3b4f02e03930a470020e0e48d24b84678bb558f46182888d870541f5e25c7","SHA384":"53e346bbde23779a5d116cc9d86fdd71c97b1f1b343439f8a11aa1d3c87af63864bb8488a5aeb2d0c26a6a1e0b15f03f"}},{"Subject":"C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=Terms of use at https://www.verisign.com/rpa (c)04, CN=VeriSign Class 3 Code Signing 2004 CA","ValidFrom":"2004-07-16 00:00:00","ValidTo":"2014-07-15 23:59:59","Signature":"ae3a17b84a7b55fa6455ec40a4ed494190999c89bcaf2e1dca7823f91c190f7feb68bc32d98838dedc3fd389b43fb18296f1a45abaed2e26d3de7c016e000a00a4069211480940f91c1879672324e0bbd5e150ae1bf50edde02e81cd80a36c524f9175558aba22f2d2ea4175882f63557d1e545a9559cad93481c05f5ef67ab5","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":true,"SerialNumber":"4191a15a3978dfcf496566381d4c75c2","Version":3,"CertificateType":"CA","IsCodeSigning":true,"IsCA":true,"TBS":{"MD5":"41011f8d0e7c7a6408334ca387914c61","SHA1":"c7fc1727f5b75a6421a1f95c73bbdb23580c48e5","SHA256":"88dd3952638ee82738c03168e6fd863fe4eab1059ee5e2926ad8cb587c255dc0","SHA384":"a00aa5ed457c41e37967882644d63366bae014f03a986576d8514164d7027acf7d0b5e03d764db2558f60db148954459"}},{"Subject":"C=TW, ST=Taiwan, L=Taipei, O=Mitac Technology Corporation, OU=Digital ID Class 3 , Microsoft Software Validation v2, CN=Mitac Technology Corporation","ValidFrom":"2008-10-08 00:00:00","ValidTo":"2009-10-23 23:59:59","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":false,"SerialNumber":"6088078ee11491f60ccddef11374431a","Version":3,"CertificateType":"Leaf (Code Signing)","IsCodeSigning":true,"IsCA":false,"TBS":{"MD5":"b2b41fe37981c6cd7f41eb207443bf3b","SHA1":"2c72e3c0f306a754b1c2f235eb2e1e9b8a5a4a19","SHA256":"2b6a21c61ca95ed2727b13f085a67f552a66f45b13d9db2943ed96a062dd3089","SHA384":"ef4cebd45206c18ea14e7ff1bffe3cfe4b26714128f4d064036a793aa65728fccf6b82b4d6e123152f4dd22688a80bf4"}},{"Subject":"C=US, O=VeriSign, Inc., OU=Class 3 Public Primary Certification Authority","ValidFrom":"2006-05-23 17:01:29","ValidTo":"2016-05-23 17:11:29","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":true,"SerialNumber":"610c120600000000001b","Version":3,"CertificateType":"Intermediate","IsCodeSigning":false,"IsCA":false,"TBS":{"MD5":"53c41bc1164e09e0cd1617a5bf913efd","SHA1":"93c03aac8951d494ecd5696b1c08658541b18727","SHA256":"40bddadac24dc61ca4fb5cab2a2bc5d876bc36808311039a7a3e1a4066f7489b","SHA384":"f51d4e75ba638f7314cd59b8d6d45f3b34d35ce6986e9d205cd6f333e8e8d8e9c91f636e6bc84731b6661673f40963d8"}}],"Signer":[{"SerialNumber":"6088078ee11491f60ccddef11374431a","Issuer":"C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=Terms of use at https://www.verisign.com/rpa (c)04, CN=VeriSign Class 3 Code Signing 2004 CA","Version":1}]}],"LoadsDespiteHVCI":"FALSE"}]}}