Feeds

Researcher cracks Wi-Fi passwords with Amazon cloud

Return of the Caveman attack

Boost IT visibility and business value

A security researcher has tapped Amazon's cloud computing service to crack Wi-Fi passwords in a fraction of the time and for a fraction of the cost of using his own gear.

Thomas Roth of Cologne, Germany told Reuters he used custom software running on Amazon's Elastic Compute Cloud service to break into a WPA-PSK protected network in about 20 minutes. With refinements to his program, he said he could shave the time to about six minutes. With EC2 computers available for 28 cents per minute, the cost of the crack came to just $1.68.

“People tell me there is no possible way to break WPA, or, if it were possible, it would cost you a ton of money to do so,” Roth told the news service. “But it is easy to brute force them.”

Roth is the same researcher who in November used Amazon's cloud to brute force SHA-1 hashes. Roth said he cracked 14 hashes from a 160-bit SHA-1 hash with a password of between one and six characters in about 49 minutes. He told The Register at the time he'd be able to significantly reduce that time with minor tweaks to his software, which made use of “Cluster GPU Instances” of the EC2 service.

As the term suggests, brute force cracks are among the least sophisticated means of gaining unauthorized access to a network. Rather than exploit weaknesses, they try huge numbers of possible passwords until the right phrase is entered. Roth has combined this caveman approach with a highly innovative technique that applies it to extremely powerful servers that anyone can rent at highly affordable rates.

Roth's latest program uses EC2 to run through 400,000 possible passwords per second, a massive amount that only a few years ago would have required the resources of a supercomputer. He is scheduled to present his findings at next week's Black Hat security conference in Washington, DC. ®

Gartner critical capabilities for enterprise endpoint backup

More from The Register

next story
Microsoft: We plan to CLEAN UP this here Windows Store town
Paid-for apps that provide free downloads? Really
Snowden on NSA's MonsterMind TERROR: It may trigger cyberwar
Plus: Syria's internet going down? That was a US cock-up
Who needs hackers? 'Password1' opens a third of all biz doors
GPU-powered pen test yields more bad news about defences and passwords
e-Borders fiasco: Brits stung for £224m after US IT giant sues UK govt
Defeat to Raytheon branded 'catastrophic result'
Hear ye, young cyber warriors of the realm: GCHQ wants you
Get involved, get a job and then never discuss work ever again
Chinese hackers spied on investigators of Flight MH370 - report
Classified data on flight's disappearance pinched
Microsoft cries UNINSTALL in the wake of Blue Screens of Death™
Cache crash causes contained choloric calamity
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
7 Elements of Radically Simple OS Migration
Avoid the typical headaches of OS migration during your next project by learning about 7 elements of radically simple OS migration.
BYOD's dark side: Data protection
An endpoint data protection solution that adds value to the user and the organization so it can protect itself from data loss as well as leverage corporate data.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?