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Conficker virus begins to attack PCs - experts
Published in Saudi Press Agency on 24 - 04 - 2009


A malicious software program
known as Conficker that many feared would wreak havoc on April
1 is slowly being activated, weeks after being dismissed as a
false alarm, Reuters quoted security experts as saying.
Conficker, also known as Downadup or Kido, is quietly
turning an unknown number of personal computers into servers of
e-mail spam, they added.
The worm started spreading late last year, infecting
millions of computers and turning them into "slaves" that
respond to commands sent from a remote server that effectively
controls an army of computers known as a botnet.
Its unidentified creators started using those machines for
criminal purposes in recent weeks by loading more malicious
software onto a small percentage of computers under their
control, said Vincent Weafer, a vice president with Symantec
Security Response, the research arm of the world's largest
security software maker, Symantec Corp.
Conficker installs a second virus, known as Waledac, that
sends out e-mail spam without knowledge of the PC's owner,
along with a fake anti-spyware program, Weafer said.
The Waledac virus recruits the PCs into a second botnet
that has existed for several years and specializes in
distributing e-mail spam.
Conficker also carries a third virus that warns users their
PCs are infected and offers them a fake anti-virus program,
Spyware Protect 2009 for $49.95, according to Russian-based
security researcher Kaspersky Lab. If they buy it, their credit
card information is stolen and the virus downloads even more
malicious software.
Weafer said that while he believes the number of infected
machines that have become active is relatively small, he
expects a consistent stream of attacks to follow, with other
types of malware distributed by Conficker's authors.
"Expect this to be long-term, slowly changing," he said of
the worm. "It's not going to be fast, aggressive."
Researchers feared the network controlled by the Conficker
worm might be deployed on April 1 for the first time since the
worm surfaced last year because it was programmed to increase
communication attempts from that date.
The security industry formed a task force to fight the
worm, bringing widespread attention that experts said probably
scared off the criminals who command the slave computers.
That task force thwarted the worm partially by using the
Internet's traffic control system to block access to servers
that control the slave computers.
Viruses that turn PCs into slaves exploit weaknesses in
Microsoft's Windows operating system. The Conficker worm is
especially tricky because it can evade corporate firewalls by
passing from an infected machine onto a USB memory stick, then
onto another PC.
The Conficker botnet is one of many such networks
controlled by syndicates that authorities believe are based in
eastern Europe, southeast Asia, China and Latin America.


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