UK, not North Korea, source of DDOS attacks, researcher says

Analysis contradicts assertions made by some governments of North Korean involvement

The U.K. was the likely source of a series of attacks last week that took down popular Web sites in the U.S. and South Korea, according to an analysis performed by a Vietnamese computer security analyst.

The results contradict assertions made by some in the U.S. and South Korean governments that North Korea was behind the attack. Security analysts had been skeptical of the claims, which were reportedly made in off-the-record briefings and for which proof was never delivered.

The week-long distributed denial of service attack involved sending multiple requests to a handful of Web sites from tens of thousands of computers so the sites became overloaded. Among the sites taken offline at some time during the week were those of the U.S. Departments of Transportation and Treasury, the U.S. Federal Trade Commission, the South Korea's president's home page, the South Korean national assembly and U.S. Forces Korea.

The computers used to send the flood of requests had been infected with a virus that allowed attackers to use them anonymously.

Every three minutes the infected computers randomly selected one of eight servers to connect to and receive orders, said Nguyen Minh Duc, senior security director at Bach Khoa Internetwork Security (Bkis), in a blog posting on the company's Web site. Bkis says it gained control of two of the eight servers and through this has been able to discover the master server.

That server has an IP address in the 195.90.118.x range, Nguyen said.

The address is registered to Global Digital Broadcast in the U.K. The company could not immediately be contacted.

"Having located the attacking source in UK, we believed that it is completely possible to find out the hacker," Nguyen wrote.

Through analyzing the log files of the two servers it controls, Bkis said the attacks utilized 166,908 PCs in 74 countries that had been infected. That figure is significantly higher than the "several tens of thousands" that other security companies had estimated were involved.

The largest number of infected PCs were in South Korea followed by the U.S., China, Japan, Canada, Australia, the Philippines, New Zealand, the U.K. and Vietnam.

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags north koreaddosUK

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Martyn Williams

IDG News Service
Show Comments

Cool Tech

Toys for Boys

Family Friendly

Stocking Stuffer

SmartLens - Clip on Phone Camera Lens Set of 3

Learn more >

Christmas Gift Guide

Click for more ›

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Maryellen Rose George

Brother PT-P750W

It’s useful for office tasks as well as pragmatic labelling of equipment and storage – just don’t get too excited and label everything in sight!

Cathy Giles

Brother MFC-L8900CDW

The Brother MFC-L8900CDW is an absolute stand out. I struggle to fault it.

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?