Cold-calling scammers target antivirus customers, diversify their tactics

Tech support scammers are impersonating customer representatives from antivirus companies

Tech support scammers have started targeting antivirus customers and have diversified their techniques, according to reports from antivirus vendors Avast and ESET.

Cold-calling scams that target English-speaking computer users have been a common occurrence during the past two years. The scammers usually pose as tech support engineers who work for Microsoft or ISPs in an attempt to trick victims into buying questionable security or PC optimization software.

However, it seems that these attacks are becoming increasingly more targeted, with callers beginning to impersonate employees from companies that users have already entrusted with their computers' protection.

"During the past week or so, we have received some complaints and it appears that some of our customers are being targeted by a new scam," said Adam Riley, head of third party suppliers at antivirus firm Avast Software, in a blog post on Tuesday.

A small number of Avast customers have recently received unsolicited phone calls from people claiming to be Avast customer service representatives, who asked for money to fix problems identified on their computers, Riley said.

However, Avast's customers are not the only antivirus users targeted by tech support scammers. "I recently learned from my colleagues at ESET UK that cold-callers from Mumbai have developed a new twist on this cold-calling scam, calling people in the UK and apparently claiming to offer paid support in response to problems that don't exist, because, they claim, 'ESET doesn't offer free support'," said David Harley, a senior research fellow at antivirus vendor ESET, in a blog post.

Harley has been tracking tech support scams for a long time and has recently observed the development of new tactics by the people behind them.

In order to trick victims into believing that their computers have a problem, scammers commonly leverage the Windows Event Viewer, a legitimate Microsoft application that lists various errors and warnings logged on the system. Most of them are not of critical importance, but can appear worrisome to non-technical users.

However, attackers have recently started to ask users to open the Run dialog box by pressing Win key + R and type commands like "prefetch hidden virus" or "inf trojan malware," Harley said.

The PREFETCH and INF commands open the C:\Windows\Prefetch and C:\Windows\Inf folders respectively, which contain legitimate system files. However, less technical users might be inclined to think that these are malicious files revealed by the "hidden virus" or "trojan malware" command parameters.

"In fact, neither of these commands accepts parameters in the Run box," Harley said. "You could type 'inf elvish fantasy' or 'prefetch me a gin and tonic' and you'd get exactly the same directory listing, showing legitimate files."

Fortunately, antivirus companies almost never contact their customers by phone regarding technical support issues, so receiving unsolicited phone calls from people claiming to represent such companies is a good indication of a scam, Harley said. "I can't guarantee that you won't get marketing calls but they should be within acceptable legal and ethical boundaries, and that doesn't include pretending to see malware on a system they don't have access to."

Another sign that users are dealing with a scam is the caller's intention to use free or trial versions of commercial remote desktop software. "If a professional AV company needs access to your machine, they won't do it by misusing free licences for another company's software," Harley said.

Sponsored Content: Collaboration has become the new movement in IT. Servers will become an integral part of this industry transition. Click here to learn more.

Join the ARN newsletter!

Error: Please check your email address.

More about AvastMicrosoft

ARN Directory | Distributors relevant to this article

 
Computerworld
CIO
Techworld
CMO

Latest News

11:16AM
US rejects North Korea offer to investigate Sony hack, reaches out to China
Dec 21
North Korea wants joint probe into Sony hack, warns of consequences if not
Dec 20
Staples says hack may have compromised 1 million-plus payment cards
Dec 20
Judge questions evidence on whether NSA spying is too broad
More News
05 May
CeBIT Australia 2015
27 May
World Business Forum Sydney
View all events