Elastic low stable eql
Shortcut File Written or Modified on Startup Folder
Identifies shortcut files written to or modified in the startup folder. Adversaries may use this technique to maintain persistence.
Detection Logic
file where host.os.type == "windows" and event.type != "deletion" and file.extension == "lnk" and
file.path : (
"C:\\Users\\*\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\*",
"C:\\ProgramData\\Microsoft\\Windows\\Start Menu\\Programs\\StartUp\\*"
) and
not (
(process.name : "ONENOTE.EXE" and process.code_signature.status: "trusted" and file.name : "*OneNote.lnk") or
(process.name : "OktaVerifySetup.exe" and process.code_signature.status: "trusted" and file.name : "Okta Verify.lnk") or
(process.name : "OneLaunch.exe" and process.code_signature.status: "trusted" and file.name : "OneLaunch*.lnk") or
(process.name : "APPServerClient.exe" and process.code_signature.status: "trusted" and file.name : "Parallels Client.lnk")
) Field Validations
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