Elastic Defend high stable eql

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.

View Source

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

Loading…

Comments (0)

Loading comments...