Follow Us

We use cookies to provide you with a better experience. If you continue to use this site, we'll assume you're happy with this. Alternatively, click here to find out how to manage these cookies

hide cookie message

New spy rootkit targets industrial secrets

Windows virus takes aim at Siemens SCADA management systems

Article comments

Siemens is warning customers of a new and highly sophisticated virus that targets the computers used to manage large-scale industrial control systems used by manufacturing and utility companies.

Siemens learned about the issue on 14 July, Siemens Industry spokesman Michael Krampe said in an email message Friday. "The company immediately assembled a team of experts to evaluate the situation. Siemens is taking all precautions to alert its customers to the potential risks of this virus," he said.

Security experts believe the virus appears to be the kind of threat they have worried about for years - malicious software designed to infiltrate the systems used to run factories and parts of the critical infrastructure.

Some have worried that this type of virus could be used to take control of those systems, to disrupt operations or trigger a major accident, but experts say an early analysis of the code suggests it was probably designed to steal secrets from manufacturing plants and other industrial facilities.

"This has all the hallmarks of weaponised software, probably for espionage," said Jake Brodsky, an IT worker with a large utility, who asked that his company not be identified because he was not authorised to speak on its behalf.

Other industrial systems security experts agreed, saying the malicious software was written by a sophisticated and determined attacker. The software does not exploit a bug in the Siemens system to get onto a PC, but instead uses a previously undisclosed Windows bug to break into the system.

The virus targets Siemens management software called Simatic WinCC, which runs on the Windows operating system.

"Siemens is reaching out to its sales team and will also speak directly to its customers to explain the circumstances," Krampe said. "We are urging customers to carry out an active check of their computer systems with WinCC installations and use updated versions of antivirus software in addition to remaining vigilant about IT security in their production environments."

Late Friday, Microsoft issued a security advisory warning of the issue, saying it affects all versions of Windows, including its latest Windows 7 operating system. The company has seen the bug exploited only in limited, targeted attacks, Microsoft said.

The systems that run the Siemens software, called SCADA (supervisory control and data acquisition) systems, are typically not connected to the Internet for security reasons, but this virus spreads when an infected USB stick is inserted into a computer.

Once the USB device is plugged into the PC, the virus scans for a Siemens WinCC system or another USB device, according to Frank Boldewin, a security analyst with German IT service provider GAD, who has studied the code. It copies itself to any USB device it finds, but if it detects the Siemens software, it immediately tries to log in using a default password. Otherwise it does nothing, he said in an email interview.

That technique may work, because SCADA systems are often badly configured, with default passwords unchanged, Boldewin said.

The virus was discovered last month by researchers with VirusBlokAda, a little-known antivirus firm based in Belarus, and reported Thursday by security blogger Brian Krebs.

To get around Windows systems that require digital signatures - a common practice in SCADA environments - the virus uses a digital signature assigned to semiconductor maker Realtek. The virus is triggered anytime a victim tries to view the contents of the USB stick. A technical description of the virus can be found here (pdf).

It's unclear how the authors of the virus were able to sign their code with Realtek's digital signature, but it may indicate that Realtek's encryption key has been compromised. The Taiwanese semiconductor maker could not be reached for comment Friday.

In many ways, the virus mimics proof-of-concept attacks that security researchers like Wesley McGrew have been developing in laboratories for years. The systems it targets are attractive to attackers because they can provide a treasure-trove of information about the factory or utility where they're used.

Whoever wrote the virus software may have been targeting a specific installation, said McGrew, founder of McGrew Security and a researcher at Mississippi State University. If the authors had wanted to break into as many computers as possible, rather than a specific target, they would have tried to exploit more popular SCADA management systems such as Wonderware or RSLogix, he said.

According to experts there are several reasons why someone might want to break a SCADA system "There may be money in it," McGrew said. "Maybe you take over a SCADA system and you hold it hostage for money."

Criminals could use the information from a manufacturer's WinCC system to learn how to counterfeit products, said Eric Byres, chief technology officer with security consultancy Byres Security. "This looks like a grade A case of focused IP-harvesting," he said. "This looks focused and real."

Robert McMillan covers computer security and general technology breaking news for The IDG News Service. Follow Robert on Twitter at @bobmcmillan. Robert's e-mail address is robert_mcmillan@idg.com



Share:

More from Techworld

More relevant IT news

Comments



Send to a friend

Email this article to a friend or colleague:

PLEASE NOTE: Your name is used only to let the recipient know who sent the story, and in case of transmission error. Both your name and the recipient's name and address will not be used for any other purpose.

Techworld White Papers

Choose – and Choose Wisely – the Right MSP for Your SMB

End users need a technology partner that provides transparency, enables productivity, delivers...

Download Whitepaper

10 Effective Habits of Indispensable IT Departments

It’s no secret that responsibilities are growing while budgets continue to shrink. Download this...

Download Whitepaper

Gartner Magic Quadrant for Enterprise Information Archiving

Enterprise information archiving is contributing to organisational needs for e-discovery and...

Download Whitepaper

Advancing the state of virtualised backups

Dell Software’s vRanger is a veteran of the virtualisation specific backup market. It was the...

Download Whitepaper

Techworld UK - Technology - Business

Innovation, productivity, agility and profit

Watch this on demand webinar which explores IT innovation, managed print services and business agility.

Techworld Mobile Site

Access Techworld's content on the move

Get the latest news, product reviews and downloads on your mobile device with Techworld's mobile site.

Find out more...

From Wow to How : Making mobile and cloud work for you

On demand Biztech Briefing - Learn how to effectively deliver mobile work styles and cloud services together.

Watch now...

Site Map

* *