{"Id":"3ac0eda2-a844-4a9d-9cfa-c25a9e05d678","Tags":["Bs_Def.sys"],"Verified":"FALSE","Author":"Michael Haag","Created":"2023-01-09","MitreID":"T1068","Category":"vulnerable driver","Commands":{"Command":"sc.exe create Bs_Def.sys binPath=C:\\windows\\temp\\Bs_Def.sys type=kernel && sc.exe start Bs_Def.sys","Description":"","OperatingSystem":"Windows 10","Privileges":"kernel","Usecase":"Elevate privileges"},"Resources":["https://learn.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-driver-block-rules"],"Detection":[{"type":"yara_signature","value":"https://github.com/magicsword-io/LOLDrivers/blob/main/detections/yara/5f5e5f1c93d961985624768b7c676d488c7c7c1d4c043f6fc1ea1904fefb75be.yara"},{"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"},{"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":[{"Authentihash":{"MD5":"f27b347b5124473a3a9a46986889e408","SHA1":"69ca963ec00bdd2a92a9777e91d0174bbe97e29c","SHA256":"410f02303292798ab2a8b3e7d253938b466e83071b15e7d3aaa25f4995b27187"},"Company":"AsusTek Computer Inc.","Copyright":"Copyright (C) AsusTek Computer. 1992-2004","CreationTimestamp":"2008-01-13 21:30:32","Date":"","Description":"Default BIOS Flash Driver","ExportedFunctions":"","FileVersion":"1.24 built by: WinDDK","Filename":"Bs_Def.sys","ImportedFunctions":["MmBuildMdlForNonPagedPool","IoAllocateMdl","MmGetPhysicalAddress","MmAllocateContiguousMemory","IoFreeMdl","MmUnmapLockedPages","KeDelayExecutionThread","DbgPrint","MmUnmapIoSpace","MmMapIoSpace","RtlZeroMemory","IoDeleteDevice","IoCreateSymbolicLink","IoCreateDevice","MmMapLockedPages","IofCompleteRequest","IoDeleteSymbolicLink","ZwClose","ZwMapViewOfSection","ObReferenceObjectByHandle","ZwOpenSection","ZwUnmapViewOfSection","strncpy","KeLeaveCriticalRegion","KeEnterCriticalRegion","IoIs32bitProcess","strstr","strncmp","RtlInitUnicodeString","MmFreeContiguousMemory","HalTranslateBusAddress"],"Imports":["ntoskrnl.exe","HAL.dll"],"InternalName":"Bs_Def64.sys","MD5":"a9f220b1507a3c9a327a99995ff99c82","MachineType":"AMD64","MagicHeader":"50 45 0 0","OriginalFilename":"Bs_Def64.sys","Product":"Support SST39SF020,SST29EE020,AT49F002T,AT29C020,AM29F002NT,AM29F002NB,V29C51002T,V29C51002B,M29F002T,W29C020.","ProductVersion":"1.24","Publisher":"","RichPEHeaderHash":{"MD5":"b9778f4f7aef605da31955e8c8dce73b","SHA1":"c238d428e1d44bf02fff788a0116e22fe52eced5","SHA256":"e2a2300457038c8e2fb727789dc596bc4613ad168457b2335dba604e2432fa5c"},"SHA1":"2c5ff272bd345962ed41ab8869aef41da0dfe697","SHA256":"5f5e5f1c93d961985624768b7c676d488c7c7c1d4c043f6fc1ea1904fefb75be","Sections":{".text":{"Entropy":6.292910223541919,"Virtual Size":"0x1ef2"},".rdata":{"Entropy":4.119337235735607,"Virtual Size":"0x2b0"},".data":{"Entropy":0.020393135236084953,"Virtual Size":"0x4540"},".pdata":{"Entropy":3.8139163392612154,"Virtual Size":"0x120"},"INIT":{"Entropy":4.72379419775939,"Virtual Size":"0x3ca"},".rsrc":{"Entropy":3.495555403797425,"Virtual Size":"0x458"}},"Signature":["ASUSTeK Computer Inc.","VeriSign Class 3 Code Signing 2004 CA","VeriSign Class 3 Public Primary CA"],"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=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"}},{"Subject":"C=TW, ST=Taiwan, L=Taipei / Peitou, O=ASUSTeK Computer Inc., OU=Digital ID Class 3 , Microsoft Software Validation v2, OU=Quality Testing Department, CN=ASUSTeK Computer Inc.","ValidFrom":"2007-07-03 00:00:00","ValidTo":"2008-07-26 23:59:59","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":false,"SerialNumber":"23eab3ac30c7016a299c8d31d99f3ae8","Version":3,"CertificateType":"Leaf (Code Signing)","IsCodeSigning":true,"IsCA":false,"TBS":{"MD5":"54f73eaca10fe12ff2e14194e2f019b8","SHA1":"471cb77202e7d4941a5bff8ba813f5ed221dc32e","SHA256":"9dba2d4765226ca91fb7104e0cbd01308c4e8ed9727ea661eeaa473d7825ee35","SHA384":"272d877ad02e5487a0864e4d876a9e06fea5ead9cd149e7a48c4f111cfa8dc2f05f1042f2822b42360896da334e6390d"}}],"Signer":[{"SerialNumber":"23eab3ac30c7016a299c8d31d99f3ae8","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}]}],"Imphash":"e5fd4339e7b94543b16624a27ba1c872","LoadsDespiteHVCI":"FALSE"}]}