What is "download.ject"

In computing, Download.ject (also known as Toofer and Scob) is a malware program for Microsoft Windows servers. When installed on an insecure website running on Microsoft Internet Information Services (IIS), it appends malicious JavaScript to all pages served by the site.

Download.ject was the first noted case in which users of Internet Explorer for Windows could infect their computers with malware (a backdoor and key logger) merely by viewing a web page. It came to prominence during a widespread attack starting June 23, 2004. Infected servers included several financial sites. Security consultants prominently started promoting the use of Opera or Mozilla Firefox instead of IE in the wake of this attack.

Download.ject is not a virus or a worm; it does not spread by itself. The June 23 attack is hypothesised to have been put into place by automatic scanning of servers running IIS.