{"Id":"97ed6c7b-be4c-4f60-9157-c788a555ca9f","Tags":["iscflashx64.sys"],"Verified":"TRUE","Author":"Takahiro Haruyama","Created":"2023-10-12","MitreID":"T1542","Category":"vulnerable driver","Commands":{"Command":"sc.exe create iscflashx64.sys binPath=C:\\windows\\temp\\iscflashx64.sys type=kernel && sc.exe start iscflashx64.sys","Description":"CVE-2021-33834","Usecase":"firmware erasing/modification","Privileges":"kernel","OperatingSystem":"Windows 11"},"Resources":[""],"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":{"Person":"","Handle":""},"KnownVulnerableSamples":[{"Filename":"","MD5":"1f8a9619ab644728ce4cf86f3ad879ea","SHA1":"46be4e6cd8117ac13531bff30edcf564f39bcc52","SHA256":"ce0a4430d090ba2f1b46abeaae0cb5fd176ac39a236888fa363bf6f9fd6036d9","Signature":"","Date":"","Publisher":"","Company":"Insyde Software","Description":"iscflashx64.sys","Product":"Insyde Flash Utility 64 bit Driver","ProductVersion":"5, 2, 1, 1","FileVersion":"5, 2, 1, 1","MachineType":"AMD64","OriginalFilename":"iscflashx64.sys","Imphash":"31a3c2c72c9a565dc4ba75ef26677569","Authentihash":{"MD5":"89fd5d30f33a1c6c052f9561fae3c6c8","SHA1":"cc6e7cf720925c3c3206b5089eac0521fac338d0","SHA256":"68105d0f74ab436d36a741095d9ac08b8316e926727d59f3fe874395b291615c"},"RichPEHeaderHash":{"MD5":"3a58b995b412f2da523684e6020016e2","SHA1":"0a47041d91ef860f1ae51288847e2d5dfba241a6","SHA256":"820ffc66f9ac7817ebf2df3102df2a1d202e3e54ff38dedd766fd1b5b8717be6"},"Sections":{".text":{"Entropy":6.03892428401328,"Virtual Size":"0x21c6"},"init":{"Entropy":6.098854011144051,"Virtual Size":"0x9f9"},"page":{"Entropy":6.22401160507768,"Virtual Size":"0x80e7"},".rdata":{"Entropy":4.952595204182577,"Virtual Size":"0x970"},".data":{"Entropy":0.378703493487675,"Virtual Size":"0x399c"},".pdata":{"Entropy":4.396910354129109,"Virtual Size":"0x570"},"INIT":{"Entropy":5.122839794345092,"Virtual Size":"0x362"},".rsrc":{"Entropy":3.350240716548938,"Virtual Size":"0x3c0"}},"MagicHeader":"50 45 0 0","CreationTimestamp":"2015-01-05 01:43:38","InternalName":"InsydeFlash","Copyright":"Copyright (c) 2015 Insyde Software Corp. All Rights Reserved.","Imports":["ntoskrnl.exe"],"ExportedFunctions":"","ImportedFunctions":["_vsnprintf","IofCompleteRequest","IoDeleteDevice","IoDeleteSymbolicLink","RtlInitUnicodeString","MmFreeContiguousMemorySpecifyCache","MmGetPhysicalAddress","MmAllocateContiguousMemorySpecifyCache","MmUnmapIoSpace","MmMapIoSpace","ExFreePoolWithTag","RtlCompareMemory","ExAllocatePoolWithTag","IoCreateSymbolicLink","IoCreateDevice","MmMapLockedPagesSpecifyCache","RtlQueryRegistryValues","ZwCreateFile","ZwClose","ZwWriteFile","RtlTimeToTimeFields","ExSystemTimeToLocalTime","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":"783bb4912a004cf08f62303778a38427076f18b2de25dca0d49403aa864e259f9a40031cddcee379cb216806dab632b46dbff42c266333e449646d0de6c3670ef705a4356c7c8916c6e9b2dfb2e9dd20c6710fcd9574dcb65cdebd371f4378e678b5cd280420a3aaf14bc48829910e80d111fcdd5c766e4f5e0e4546416e0db0ea389ab13ada097110fc1c79b4807bac69f4fd9cb60c162bf17f5b093d9b5be216ca13816d002e380da8298f2ce1b2f45aa901af159c2c2f491bdb22bbc3fe789451c386b182885df03db451a179332b2e7bb9dc20091371eb6a195bcfe8a530572c89493fb9cf7fc9bf3e226863539abd6974acc51d3c7f92e0c3bc1cd80475","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=TW, ST=Taiwan, L=Taipei, O=Insyde Software Corp., OU=Digital ID Class 3 , Microsoft Software Validation v2, CN=Insyde Software Corp.","ValidFrom":"2012-12-28 00:00:00","ValidTo":"2016-01-27 23:59:59","Signature":"19cf4cfe8a901a2d50614d496664fcdaaa80098ec50cec3e3f56a3d08a399d96d13046789c8281a1a9bf1054c79351f73e091664da593dcd39ec4ad7077513b01270666042cb743d4cd2387b61067384d5ed20ee0773e7e61fc1a8a750c3882c6e64ad0f8819b91c19c50708510467ee34ac845fb0a68259e90c7dbef65dcc4b75c72fde8d954ef37d53bba6f00a40e1c85deeb81531772b07232f8e8fe791eac42ab152b5e970c008f14bdec7a7e1ac114bae73ae1ba4f3a525a169f37de670a9447f65653426abb77c6a8b7f91c2d5428a63059129ba94818d3f6cceac0e0790ddb23d56f598e0a9083fc8b92a3b100c0dc1729290ba44fb1538ac4cedf926","SignatureAlgorithmOID":"1.2.840.113549.1.1.5","IsCertificateAuthority":false,"SerialNumber":"0355af7ef9418e476d877eecd9f9e9e2","Version":3,"CertificateType":"Leaf (Code Signing)","IsCodeSigning":true,"IsCA":false,"TBS":{"MD5":"768c1a47836a7536fbc50e7be60e65ff","SHA1":"569a77bd8a095070b13b75bc81cd0422f746daa3","SHA256":"d5289c20d1f89ac5000b691627764379d369c68ab7d53425baa8e83f09b5b369","SHA384":"92eb214d60e1c7342eb7b4863dd634d364d80494b4090301e872fba4d2efbec2a799d49f0ac9590f8c61e0fb3b905af3"}},{"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"}},{"Subject":"C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=Terms of use at https://www.verisign.com/rpa (c)10, CN=VeriSign Class 3 Code Signing 2010 CA","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":"0355af7ef9418e476d877eecd9f9e9e2","Issuer":"C=US, O=VeriSign, Inc., OU=VeriSign Trust Network, OU=Terms of use at https://www.verisign.com/rpa (c)10, CN=VeriSign Class 3 Code Signing 2010 CA","Version":1}]}],"LoadsDespiteHVCI":"TRUE"}]}