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Botnet shutdown divides experts
By Maggie Shiels
Technology reporter, BBC News, Silicon Valley
Security experts are split over the effectiveness of Microsoft's efforts to shut down a network of computers that spewed out 1.5 billion spam messages.
The firm persuaded a US judge to issue a court order to cripple 277 internet domains used by the Waledac botnet.
Botnets are armies of infected computers that send spam or malware.
"We aim to be more proactive in going after botnets to help protect the internet," said Richard Boscovich, the head of Microsoft's digital crime unit.
"We will do whatever it takes to look out for our customers and our brand. We hope it will spur similar actions," Mr Boscovich told the BBC.
The impact of Waledac was seen as devastating. Microsoft cited one 18-day period between from 3-12 December when the botnet sent more than 650 million spam e-mails to Hotmail accounts for everything from online pharmacies to fake designer goods, jobs and more.
"This was a worldwide problem and we scored a big, big victory," said Mr Boscovich.
"Microsoft has taken a bold move in addressing this problem and it will be interesting to see how it develops," said Sandra Toms LaPedis, general manager of the RSA Conference, the world's biggest gathering of security professionals.
To get Waledac shut down, Microsoft said it employed "an innovative application of a tried and true legal strategy".
The court hearing at which the order to sever the domains was issued took place behind closed doors, granted under seal and ex-parte meaning Waledac administrators did not have to attend. In civil cases this is seen as unusual as courts are reluctant to rule without everyone in attendance.
“ "Given the recent spread of botnets, we are getting more creative and agressive in the fight against botnets and all forms of cybercrime." ”
Mr Boscovich said this was the only way it could ensure the success of what it dubbed Operation b49.
"If the organisation behind Waledac had any idea we were trying to shut them down like this, they would have moved their operation.
"But we convinced the court that Microsoft's customers and those of other companies worldwide were suffering irreparable damage and that there was a high probability that evidence would be destroyed," said Mr Boscovich.
He also said that Microsoft's approach was a "unique way to solve a 21st century problem".
The software giant claimed its approach had "quickly and effectively cut off traffic to Waledac and severed the connection to most of its thousands of zombie computers".
Others in the security industry were unconvinced.
"This will not make the problem disappear. It is a temporary reprieve," Amichai Shulman, chief technology officer for security vendor Imperva, told BBC News.
"In the short term other gangs will fill the void while the people behind Waledac regroup and start their operations all over again."
Security expert Jose Nazario of cybersecurity company Arbor Networks told the Wall Street Journal that the internet addresses Microsoft has brought down could be a small percentage of those used by hackers to control the network.
"The botnet will survive in many cases," said Mr Nazario.
Some in the industry have claimed Waledac was not a prolific spammer and that the effect of its take-down will be minimal.
"If this did affect spam, we haven't noticed," Richard Cox, the chief information officer at anti-spam service Spamhaus told ComputerWorld.com.
"Waledac was not a high threat, it's less than 1% of spam traffic."
Microsoft said although it had effectively shut down the network, thousands of computers would still be infected with malware and advised users to run anti-virus software and keep up to date with security patches.
Security firm Symantec has estimated that over 80% of unsolicited e-mail comes from botnets.
FUK OOOOOOOOF - Mrs Cooker James
you are a fo0l forever because you are not worthy to be a human being but an Animal.
.something that cannot take 10minutes is taking you 2months- barrister lawrence
N N N Master of Master Baiters
Joined: 26 Sep 2008
Fri Feb 26, 2010 11:47 am
The best thing Microsoft could do to reduce spam would be to go out of business.
Rodus Baiting Guru
Joined: 13 Dec 2006
Location: Back under the cold shower
Fri Feb 26, 2010 10:46 pm
Sadly it'll do bugger all in the long run. A downturn in spam (slightly) for a few days, then back to normal.
_________________ I will kiss you romance u,suck and penetrate u - Williams Muyeke
now am as poor as a church rat - Lou1s Mar1on
I AM FINANCIALLY DEAD RIGHT AWAY - Louis in Accra
u can keep sending money to Gomer and leave me alone - Agent Smith cracks up
Lou1s Mar1on - Lagos to Accra (satellite IP) - "so, what i need to do to get out of these place?"
- 18 mths: Louis
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