{"Id":"a4795ab6-d908-44cf-9ebf-a47db367d385","Tags":["WiRwaDrv.sys"],"Verified":"TRUE","Author":"Takahiro Haruyama","Created":"2023-11-02","MitreID":"T1068","Category":"vulnerable driver","Commands":{"Command":"sc.exe create WiRwaDrvsys binPath= C:\\windows\\temp\\WiRwaDrvsys.sys type=kernel && sc.exe start WiRwaDrvsys","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":"Wistron Corporation","Date":"","Description":"Wistron RWA Driver","FileVersion":"1.0.0.1016","Filename":"","MD5":"7be3a7a743f2013c3e90355219626c2c","MachineType":"AMD64","OriginalFilename":"WiRwaDrv.sys","Product":"Wistron RWA Driver","ProductVersion":"1.0.0.1016","Publisher":"","SHA1":"a951953e3c1bb08653ed7b0daec38be7b0169c27","SHA256":"d8fc8e3a1348393c5d7c3a84bcbae383d85a4721a751ad7afac5428e5e579b4e","Signature":"","Imphash":"21f58b1f2de6ad0e9c019da7a4e7317b","Authentihash":{"MD5":"b27ddf036b235b1a2a0f9c3869cf12e5","SHA1":"d6540f9784c51a4bf08b59e7398de5bacb4e9011","SHA256":"c7e5bd0090962b4f31e17ab3d1f97bd9870d23238b591a70e27a0c91db138f95"},"RichPEHeaderHash":{"MD5":"c5599f502c132e4cd94d522a8cadd663","SHA1":"d726b26c064ab532c55824107f0340b8b618b35e","SHA256":"5927d293c65d42091d25a0554140352e17a69c69953e583671bc6fad80728249"},"Sections":{".text":{"Entropy":6.462033360013696,"Virtual Size":"0x1543"},".rdata":{"Entropy":3.739190983334858,"Virtual Size":"0x454"},".data":{"Entropy":2.620879970154579,"Virtual Size":"0x28"},".pdata":{"Entropy":3.480354095113092,"Virtual Size":"0xb4"},"INIT":{"Entropy":4.855913278600088,"Virtual Size":"0x1f6"},".rsrc":{"Entropy":3.5094540781323795,"Virtual Size":"0x410"},".reloc":{"Entropy":2.684183719779189,"Virtual Size":"0x14"}},"MagicHeader":"50 45 0 0","CreationTimestamp":"2019-10-18 04:40:37","InternalName":"WiRwaDrv.sys","Copyright":"Copyright (C) 2019 Wistron Corporation","Imports":["ntoskrnl.exe","HAL.dll"],"ExportedFunctions":"","ImportedFunctions":["MmMapIoSpace","MmUnmapIoSpace","IofCompleteRequest","DbgPrint","IoCreateSymbolicLink","IoDeleteDevice","IoDeleteSymbolicLink","IoIs32bitProcess","IoCreateDevice","RtlInitUnicodeString","KeStallExecutionProcessor"],"Signatures":[{"CertificatesInfo":"","SignerInfo":"","Certificates":[{"Subject":"C=US, O=Symantec Corporation, OU=Symantec Trust Network, CN=Symantec Class 3 Extended Validation Code Signing CA , G2","ValidFrom":"2014-03-04 00:00:00","ValidTo":"2024-03-03 23:59:59","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.11","IsCertificateAuthority":true,"SerialNumber":"191a32cb759c97b8cfac118dd5127f49","Version":3,"CertificateType":"CA","IsCodeSigning":true,"IsCA":true,"TBS":{"MD5":"788b61bd26da89253179e3de2cdb527f","SHA1":"7d06f16e7bf21bce4f71c2cb7a3e74351451bf69","SHA256":"b3c925b4048c3f7c444d248a2b101186b57cba39596eb5dce0e17a4ee4b32f19","SHA384":"2955e28cb7ec0ea9730b499a0f189f9621eceb02591a9486b583f12bb845885a30d6a871826318a167cc5f06b274e58c"}},{"Subject":"??=TW, ??=Taipei City, ??=Taipei City, ??=Private Organization, serialNumber=12868358, C=TW, L=Taipei City, O=Wistron Corporation, CN=Wistron Corporation","ValidFrom":"2019-07-10 00:00:00","ValidTo":"2021-04-10 23:59:59","Signature":"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","SignatureAlgorithmOID":"1.2.840.113549.1.1.11","IsCertificateAuthority":false,"SerialNumber":"3fab6983c8188ce80d06ddd6b92ef292","Version":3,"CertificateType":"Leaf (Code Signing)","IsCodeSigning":true,"IsCA":false,"TBS":{"MD5":"05bc106762d78fe49ebb5136aba4f0ed","SHA1":"a5f824c6cb64fad75d9adcb6e1bb85eafd6bfb40","SHA256":"04b2175a32b3b2aa1c4523f6e6668c5ae4081ce76175f6cfe2a0fff19481b987","SHA384":"07a7d53cee7840bc277f18fc445986b9d951c577a3ab46a6a985ac21e15705e9c1556a19de3993c3af13724e5e9a5d49"}},{"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":"3fab6983c8188ce80d06ddd6b92ef292","Issuer":"C=US, O=Symantec Corporation, OU=Symantec Trust Network, CN=Symantec Class 3 Extended Validation Code Signing CA , G2","Version":1}]}],"LoadsDespiteHVCI":"FALSE"}]}