How can you send a keylogger software to a remote computer thru internet?
Perhaps the easiest way is to upload the keylogger client to a website such as rapidshare and download the file and execute it manually using the target computer. If you do not have access to said computer, then you can trick the user into downloading and executing the file. A more advanced way is to gain administrative access to a vulnerable website and rig the website with a Trojan downloader that is designed to download a certain file from a specified URL to drop a keylogger or a backdoor onto vulnerable computers that visit the website. You can then trick the target into going to that website, which will make it significantly less specific. If you already have remote access to the computer with a remote administration tool, then just upload the server onto the target computer. Hope this helps.
