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Suspicious Svchost Registry Modification
Identifies modification of the Windows shared services registry key. Adversaries may use this technique to maintain persistence or run with System privileges.
Detection Logic
registry where registry.key : "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Svchost" and
registry.data.type : "REG_MULTI_SZ" and process.executable : ("?:\\*", "\\Device\\Mup\\*") and registry.data.strings != null and
not (registry.value : "print" and registry.data.strings : "PrintNotify") and
not (process.executable : "?:\\Windows\\System32\\poqexec.exe" and user.id : "S-1-5-18") and
not (process.executable : "?:\\Program Files*\\Microsoft\\AzureAttestService\\AzureAttestServiceInstaller.exe" and
registry.value : "AzureAttestService") and
not process.executable :
("?:\\Windows\\System32\\msiexec.exe",
"?:\\Windows\\System32\\svchost.exe",
"?:\\Windows\\WinSxS\\*\\TiWorker.exe",
"?:\\Windows\\System32\\drvinst.exe",
"?:\\Windows\\System32\\spoolsv.exe",
"?:\\Windows\\System32\\regsvr32.exe",
"?:\\Windows\\System32\\wbem\\WinMgmt.exe",
"C:\\Windows\\System32\\PrintIsolationHost.exe",
"?:\\Windows\\Regedit.exe",
"?:\\Windows\\VeeamVssSupport\\VeeamGuestHelper.exe",
"?:\\Program Files\\ForeScout SecureConnector\\SecureConnector.exe",
"?:\\Program Files\\UVK - Ultra Virus Killer\\UVK_en64.exe",
"C:\\Windows\\SoftwareDistribution\\Download\\Install\\osrssinst.exe") and
not (process.code_signature.subject_name == "Arcadia Laboratories Inc." and process.code_signature.trusted == true) Field Validations
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