Elastic low stable eql

File and Directory Permissions Modification

Identifies the change of permissions/ownership of files/folders through built-in Windows utilities. Threat actors may require permission modification of files/folders to change, modify or delete them.

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Detection Logic

process where event.type == "start" and host.os.type == "windows" and
(
  ((process.name: "icacls.exe" or process.pe.original_file_name == "iCACLS.EXE") and process.args: ("*:F", "/reset", "/setowner", "*grant*")) or
  ((process.name: "cacls.exe" or process.pe.original_file_name == "CACLS.EXE") and process.args: ("/g", "*:f")) or
  ((process.name: "takeown.exe" or process.pe.original_file_name == "takeown.exe") and process.args: ("/F")) or
  ((process.name: "attrib.exe" or process.pe.original_file_name== "ATTRIB.EXE") and process.args: "-r")
) and not user.id : "S-1-5-18" and
not (
  process.args : ("C:\\ProgramData\\Lenovo\\*", "C:\\ProgramData\\Adobe\\*", "C:\\ProgramData\\ASUS\\ASUS*")
)

Field Validations

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