Today, the Oxygen3 24h-365d report deals with Freedesktop (W32/Win64.A), a mass-mailing worm designed to propagate rapidly, and a Trojan called Backdoor/CCInvader2. Freedesktop uses 'social engineering' techniques in the e-mail it used to spread. In fact, it gets into systems in a file whose name is that of a fake Internet address "w w w.freedesktopthemes.com". Through this disguise, it tries to trick users into believing that they have received a web address >from which they can download desktop themes. However, if the user runs the attached file, Freedesktop will send itself out to every entry it finds in the Windows and any mail program's address books. Moreover, the worm looks for the default mail server in order to connect to it directly and send itself massively. At regular intervals, Freedesktop attempts to connect to 19 URLS belonging to different communications companies in order to provoke a DoS (Denial of Service) attack on their servers. Furthermore, the worm creates a file called "status.ini" in the affected computer. In computers whose operating system is in English, Freedesktop also generates a file named "setup.exe" in the Windows startup directory. In this way, the worm ensures it is run on every system startup. Backdoor/CCInvader2 is a Trojan that modifies the Windows Registry and carries out a number of actions on the affected computer: it opens and closes the CD-ROM tray, manages files, controls the monitor, etc.