New Windows worm builds massive botnet
Half a million PCs infected, botnet still growing, says researcher
Computerworld - The worm exploiting a critical Windows bug that Microsoft Corp. patched with an emergency fix in late October is being used to build a new botnet, a security researcher said today.
Ivan Macalintal, a senior research engineer with Trend Micro Inc., said that the worm, which his company has dubbed "Downad.a" -- it's called "Conficker.a" by Microsoft and "Downadup" by Symantec Corp. -- is a key component in a new botnet that criminals are creating.
"We think 500,000 is a ball park figure," said Macalintal when asked the size of the new botnet. "That's not as large as some, such as [the] Kraken [botnet], or Storm earlier, but it's still starting to grow."
Last week, Microsoft warned that the worm was behind a spike in exploits of a bug in the Windows Server service, which is used by the operating system to connect to network file and print servers. Microsoft patched the service with an emergency fix it issued Oct. 23, shortly after it discovered a small number of infected PCs in Southeast Asia.
However, the new worm is a global threat, said Macalintal. "This has real potential to do damage," he said. Trend Micro has spotted infected IP addresses on the networks of Internet service providers (ISPs) in the U.S., China, India, the Middle East, Europe and Latin America.
The worm first appeared about a week and a half ago, and began spreading in earnest just before Thanksgiving, he added.
Macalintal also said that it appears the botnet is being built by a new group of cyber-criminals, not one of the gangs that lost control of compromised computers when McColo Corp., a California hosting company, was yanked off the Internet. When McColo went offline, crooks lost access to the command-and-control servers which gave marching orders to some of the world's biggest botnets, including "Srizbi" and "Rustock."
One result of the McColo takedown was a temporary slump in spam; some message security vendors said last week that they had seen a sharp increase in spam as the hackers managed to regain control of their botnets.
Security experts, including those at Trend Micro, are coordinating efforts, said Macalintal, to pass along their lists of worm-infected PCs to ISPs, who have been asked to contact the computers' owners and urge them to clean their machines of the worm.
"But that's an uphill climb," admitted Macalintal.
Users who haven't applied the emergency patch -- labeled MS08-067 by Microsoft -- should do so as soon as possible, Macalintal said.
- Estonian ISP cuts off control servers for Srizbi botnet
- Massive botnet returns from the dead, starts spamming
- Spam levels fluctuate as crooks try to revive botnets
- Spam is silenced, but where are the feds?
- Dodgy ISP McColo briefly comes online, updates botnet
- McColo shutdown forces botnets to relocate
- Hosting firm takedown bags 500,000 bots
- Spam plummets after Calif. hosting service shuttered
- McColo takedown: Internet vigilantism or online Neighborhood Watch?
- IT Blogwatch: McColo is McShut McDown
Read more about Security in Computerworld's Security Topic Center.
- Best iPhone, iPad Business Apps for 2014
- 14 Tech Conventions You Should Attend in 2014
- 10 Desktop Apps to Power Your Windows PC
- How to Add New Job Skills Without Going Back to School
- Slideshow: 7 security mistakes people make with their mobile device
- iOS vs. Android: Which is more secure?
- 11 sure signs you've been hacked
Red Hat Enterprise Linux - The Original Cloud Operating System
Linux adoption is growing against a number of measures, such as the
number of supercomputers that run Linux and the size of the contributing...
- OpenStack Hype vs. Reality: CIO Quick Pulse Open-source architecture can enable IT departments to build infrastructure-as-a-service (IaaS) clouds running on standard hardware.
- Building a Bridge to the Next Generation Data Center Selecting a widely adopted operating system is a foundational component of a standardization strategy.
- OpenStack and Red Hat: IDC White paper Most OpenStack deployments are by public cloud providers that are early adopters of technology and use OpenStack in a do-it-yourself deployment and support...
- Webinar: Building a Big Data solution that's production-ready Big data solutions are no longer just a nice-to-have.
- Meg Whitman presents Unlocking IT with Big Data During this Web Event you will hear Meg Whitman, President and CEO, HP discuss HAVEn - the #1 Big Data platform, as well... All Knowledge Center White Papers | Webcasts