The Downadup worm (also known as Conficker,or Kido) continues to spread across the world affecting more than 20 million systems as security experts fear the results should it kick-off other malicious activities.
Referred to as "very well-engineered" by Alfred Huger, vice president of development at Symantec Corp.'s security response group. Alfred Huger also called the malicious software "very complex" adding that "At the byte level, it implements [things] in some novel ways." Compared to most malware, which Huger said is "written off the cuff," Downadup is downright elegant.
The worm first surfaced in November and appears to have originated in the Ukraine. It currently keeps users from accessing antivirus sites to obtain updates, though the worm is capable of downloading a second stage of code for as yet unknown intentions, though security experts are saying we could see that soon.
Microsoft Virus Alert for Downadup, Conficker
F-Secure.com has a Disinfecting Tool available and has excellent Downadup (Conficker) Information.