{"Id":"fb783760-cb3f-4cf4-b4ac-8edb756b9821","Tags":["atlAccess.sys"],"Verified":"TRUE","Author":"Takahiro Haruyama","Created":"2023-11-02","MitreID":"T1068","Category":"vulnerable driver","Commands":{"Command":"sc.exe create atlAccesssys binPath= C:\\windows\\temp\\atlAccesssys.sys type=kernel && sc.exe start atlAccesssys","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":[],"Acknowledgement":{"Handle":"","Person":""},"KnownVulnerableSamples":[{"Company":"Windows (R) Win 7 DDK provider","Date":"","Description":"Simple PCI access driver","FileVersion":"6.1.7600.16385 built by: WinDDK","Filename":"","MD5":"08001b0cdb0946433366032827d7a187","MachineType":"AMD64","OriginalFilename":"atlAccess.sys","Product":"Windows (R) Win 7 DDK driver","ProductVersion":"6.1.7600.16385","Publisher":"","SHA1":"6b54b8f7edca5fb25a8ef1a1d31e14b9738db579","SHA256":"0b57569aaa0f4789d9642dd2189b0a82466b80ad32ff35f88127210ed105fe57","Signature":"","Imphash":"8b47d6faba90b5c89e27f7119c987e1a","Authentihash":{"MD5":"b9bac046427a6f1664a5af4baebd3a61","SHA1":"c5d83d40db80c87b370af91c67713658c6ae0a79","SHA256":"c25cb17f5879e9c2fb4c91adb18e24b50a94738d5deb62a4189065bcf2c1d86b"},"RichPEHeaderHash":{"MD5":"ae583efa641b5b3adcd20b1b1f8a468c","SHA1":"26b53309451f6cb17ebcd2e6adaf2ff420605f24","SHA256":"e5fc90cce8f3fbf1937764ed5b2b36b9d7346be931e177172ef52aaa225183f6"},"Sections":{".text":{"Entropy":5.315744591990343,"Virtual Size":"0xc24"},".rdata":{"Entropy":3.9728170876693523,"Virtual Size":"0x168"},".data":{"Entropy":0.4975521352521052,"Virtual Size":"0x11c"},".pdata":{"Entropy":3.294395845770031,"Virtual Size":"0x84"},"INIT":{"Entropy":5.075371650679493,"Virtual Size":"0x2bc"},".rsrc":{"Entropy":3.4471340230661465,"Virtual Size":"0x3f8"}},"MagicHeader":"50 45 0 0","CreationTimestamp":"2020-03-31 03:35:36","InternalName":"atlAccess.sys","Copyright":"© Microsoft Corporation. All rights reserved.","Imports":["ntoskrnl.exe"],"ExportedFunctions":"","ImportedFunctions":["MmUnmapLockedPages","ExAllocatePoolWithTag","IoDeleteSymbolicLink","ExFreePoolWithTag","RtlInitUnicodeString","IoDeleteDevice","MmUnmapIoSpace","MmBuildMdlForNonPagedPool","IoFreeMdl","MmMapLockedPagesSpecifyCache","MmMapIoSpace","IofCompleteRequest","IoCreateSymbolicLink","IoCreateDevice","RtlAssert","DbgPrint","IoAllocateMdl","KeBugCheckEx"],"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=US, ST=California, L=San Jose, O=Aquantia Corp., OU=IT, CN=Aquantia Corp.","ValidFrom":"2018-11-06 00:00:00","ValidTo":"2020-11-05 23:59:59","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.11","IsCertificateAuthority":false,"SerialNumber":"7c3eead1d01e25d1efe1e3a788d520e8","Version":3,"CertificateType":"Leaf (Code Signing)","IsCodeSigning":true,"IsCA":false,"TBS":{"MD5":"72de81c11261fe09bcf8e625f61bf119","SHA1":"5b1dfe2c24c571c2c5ead9824c2aa2c2cbc2f514","SHA256":"c0df23f328bcc3055572746dedad7427b548921bf757d8bf59e89ad321f08307","SHA384":"0e73dd74284a89d8938530f40031b1838cc58ef25523d585222505d65f1a1d50b47f6c983acd36105c0e62b5e2412b33"}},{"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":"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","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":"7c3eead1d01e25d1efe1e3a788d520e8","Issuer":"C=US, O=Symantec Corporation, OU=Symantec Trust Network, CN=Symantec Class 3 SHA256 Code Signing CA","Version":1}]}],"LoadsDespiteHVCI":"FALSE"}]}