[Aetae]

var fso = new ActiveXObject("Scripting.FileSystemObject");
var list = fso.OpenTextFile("D:\\list.txt", 1, true);            
var rest = /12/g;
var rezt = /ab/g;
while (!list.AtEndOfStream) { 
  var file = list.ReadLine();
  var myInputTextStream = fso.OpenTextFile(file, 1, true); 
  var myOutputTextStream = fso.OpenTextFile(
    file.slice(0,-4) + ".wow"
  , 2, true); 
  myOutputTextStream.Write(
    myInputTextStream
      .ReadAll()
      .replace(rest, "34")
      .replace(rezt, "34")
  )
  myInputTextStream.Close(); 
  myOutputTextStream.Close();
}
list.Close();