Conficker,which is known by different names like KIDO,DOWNANDUP,DOWNUP was first analysed and seen in the month of october 2008;when researchers claimed that the worm exploits a known vulnerability of the WINDOWS SERVER and attacks only the windows operating system's like windows 2000 ,vista,xp,windows server 2008 and also the newly released windows 7 beta.Till now OR as of date it has infected 10 million computers including PC's and infranets.It has been confirmed that since october it was just installing on machines and was spreading by scanning weak/compromised servers.
BUT now it has also been confirmed that on april 1 it will get further instructions from its main server.IT will begin checking for a payload to download on April 1, 2009.
HENCE THE COUNTDOWN.
The Payload
The "A" variant of Conficker will create an HTTP server and open a random port between 1024 and 10000. If the remote machine is exploited successfully, the victim will connect back to the HTTP server and download a worm copy. It will also reset System Restore points, and download files to the target computer.The other variants are said to have payload that will activate on April 1.
Symptoms of infection
Account lockout policies being reset automatically.
Certain Microsoft Windows services such as Automatic Updates, Background Intelligent Transfer Service (BITS), Windows Defender and Error Reporting Services are automatically disabled.
Domain controllers respond slowly to client requests.
System network gets unusually congested. This can be checked with network traffic chart on Windows Task Manager.
On websites related to antivirus software, Windows system updates cannot be accessed.
Launches a brute force dictionary attack against administrator passwords to help it spread through ADMIN$ shares, making choice of sensible passwords advisable.
Impact
Experts say it is the worst infection since the SQL Slammer.[14] Estimates of the number of computers infected range from almost 9 million PCs[15][16] to 15 million computers.
Another antivirus software vendor, Panda Security, reported that of the 2 million computers analyzed through ActiveScan, around 115,000 (6%) were infected with this malware.
The potential scale of infection is large because 30 percent of Windows computers do not have the Microsoft Windows patch released in October 2008 to block this vulnerability.
The U.K. Ministry of Defence reported that some of its major systems and desktops were infected. The worm has spread across administrative offices, NavyStar/N* desktops aboard various Royal Navy warships and Royal Navy submarines, and Hospitals across the city of Sheffield reported infection of over 800 computers.
On February 1, 2009, Schools in the town of Rochdale, England were infected. The virus spread to 13 schools estimated to have infected 7,500 computers.
On February 6, 2009, the computers used by the Houston Municipal Courts were infected with Conficker. How the virus got into the system is unknown.
On February 13, the Bundeswehr reported that some hundred of their computers were infected.
On March 27, 2009, the British Director of Parliamentary ICT released a (leaked) memo stating that the House of Commons computer network has been infected with the virus and called for all people who have access the network to use caution and to not connect any unauthorized equipment to the network.
Response
On February 12, 2009, Microsoft announced the formation of a technology industry collaboration to combat the effects of Conficker. Organizations involved in this collaborative effort include Microsoft, Afilias, ICANN, Neustar, Verisign, CNNIC, Public Internet Registry, Global Domains International, Inc., M1D Global, AOL, Symantec, F-Secure, ISC, researchers from Georgia Tech, The Shadowserver Foundation, Arbor Networks and Support Intelligence.
As of February 13, 2009, Microsoft is offering a $250,000 USD reward for information leading to the arrest and conviction of the individuals behind the creation and/or distribution of Conficker.
Patching and removal
On 15 October 2008 Microsoft released a patch (MS08-067) to fix the vulnerability.Removal tools are available from Microsoft,BitDefender,ESET, Symantec,Sophos,and Kaspersky Lab,while McAfee and AVG can remove it with an on-demand scan.While Microsoft has released patches for the later Windows XP Service Packs 2 and 3 and Windows 2000 SP4 and Vista, it has not released any patch for Windows XP Service Pack 1 or earlier versions (excluding Windows 2000 SP4), as the support period for these service packs has expired. Since the virus can spread via USB drives that trigger AutoRun, disabling the AutoRun feature for external media (through modifying the Windows Registry) is recommended.[39] However the United States Computer Emergency Readiness Team describe Microsoft's guidelines on disabling Autorun as being "not fully effective," and they provide their own guides.Microsoft has released a removal guide for the worm via the Microsoft website.
Also, on March 16, 2009, BitDefender released an updated tool to remove the already famous Downadup/Conficker worm on a new domain that has not been blocked by the malicious computer code at a website called "bdtools.net", it also comes as a separate installer dedicated to network administrators. In this way, the scanner can be dispatched throughout networks in order to remotely scan and disinfect workstations.
The Final Countdown
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