Menu
Apple shuts down first-ever ransomware attack against Mac users

Apple shuts down first-ever ransomware attack against Mac users

The ransomware was seeded inside a legitimate BitTorrent application called Transmission

Image credit: US Federal Bureau of Investigation

Image credit: US Federal Bureau of Investigation

With the help of security researchers, Apple over the weekend quickly blocked a cyberattack aimed at infecting Mac users with file-encrypting malware known as ransomware.

The incident is believed to be the first Apple-focused attack using ransomware, which typically targets computers running Windows.

Victims of ransomware are asked to pay a fee, usually in bitcoin, to get access to the decryption key to recover their files.

Security company Palo Alto Networks wrote on Sunday that it found the "KeRanger" ransomware wrapped into Transmission, which is a free Mac BitTorrent client.

Transmission warned on its website that people who downloaded the 2.90 version of the client "should immediately upgrade to 2.92."

It was unclear how the attackers managed to upload a tampered version of Transmission to the application's website. But compromising legitimate applications is a commonly used method.

"It’s possible that Transmission's official website was compromised and the files were replaced by re-compiled malicious versions, but we can’t confirm how this infection occurred," Palo Alto wrote on its blog.

The tainted Transmission version was signed with a legitimate Apple developer's certificate. If a Mac user's security settings are set to allow downloads from identified Apple developers, the person may not see a warning from Apple's GateKeeper that the application could be dangerous.

Apple revoked the certificate after being notified on Friday, Palo Alto wrote. The company has also updated its XProtect antivirus engine.

After it is installed on a system, KeRanger waits three days before connecting to a remote command-and-control server using the Tor system. It is coded to encrypt more than 300 types of files.

The ransom is 1 bitcoin, or about US$404.

There are few defenses against ransomware. Antivirus programs often do not catch it since the attackers frequently make modifications to fool security software. The best method is to ensure files are regularly backed up and that the backup system is isolated in a way to protect it from being infected as well.

Disturbingly, KeRanger appears to also try to encrypt files on Apple's Time Machine, its consumer backup drive, Palo Alto wrote.

Ransomware schemes have been around for more than a decade, but over the last few years have spiked.

At first the attacks struck consumer computers, with the aim of extracting a few hundred dollars. But it appears attackers are targeting companies and organizations that may pay a much larger ransom to avoid disruption.

Last month, a Los Angeles hospital said it paid a $17,000 ransom after saying it was the quickest, most effective way to restore its systems. The ransomware had affected it electronic medical records.

Although Apple's share of the desktop computing market is much lower than Windows, cyberattackers have been showing increasing interest in it. But so far, ransomware hasn't been a problem, although some researchers have created proof-of-concept file-encrypting malware for Macs.

Last November, Brazilian security researcher Rafael Salema Marques published a video showing how he coded ransomware for Mac in a couple of a days. He didn't release the source code.

Also, OS X security expert Pedro Vilaca posted proof-of-concept code on GitHub for Mac ransomware he wrote, another experiment showing how simple it would be for attackers to target the platform.

Follow Us

Join the New Zealand Reseller News newsletter!

Error: Please check your email address.

Featured

Slideshows

Reseller News launches inaugural Hall of Fame lunch

Reseller News launches inaugural Hall of Fame lunch

Reseller News welcomed 2015 and 2016 inductees - Darryl Swann, Dave Rosenberg, Gary Bigwood, Keith Watson, Mike Hill and Scott Green - to the inaugural Reseller News Hall of Fame lunch, held at the French Cafe in Auckland. The inductees discussed how the channel can collectively work together to benefit New Zealand, the Kiwi skills shortage and the future of the industry. Photos by Maria Stefina.

Reseller News launches inaugural Hall of Fame lunch
Educating from the epicentre - Why distributors are the pulse checkers of the channel

Educating from the epicentre - Why distributors are the pulse checkers of the channel

​As the channel changes and industry voices deepen, the need for clarity and insight heightens. Market misconceptions talk of an “under pressure” distribution space, with competitors in that fateful “race for relevance” across New Zealand. Amidst the cliched assumptions however, distribution is once again showing its strength, as a force to be listened to, rather than questioned. Traditionally, the role was born out of a need for vendors and resellers to find one another, acting as a bridge between the testing lab and the marketplace. Yet despite new technologies and business approaches shaking the channel to its very core, distributors remain tied to the epicentre - providing the voice of reason amidst a seismic industry shift. In looking across both sides of the vendor and partner fences, the middle concept of the three-tier chain remains centrally placed to understand the metrics of two differing worlds, as the continual pulse checkers of the local channel. This exclusive Reseller News Roundtable, in association with Dicker Data and rhipe, examined the pivotal role of distribution in understanding the health of the channel, educating from the epicentre as the market transforms at a rapid rate.

Educating from the epicentre - Why distributors are the pulse checkers of the channel
Kiwi channel reunites as After Hours kicks off 2017

Kiwi channel reunites as After Hours kicks off 2017

After Hours made a welcome return to the channel social calendar last night, with a bumper crowd of distributors, vendors and resellers descending on The Jefferson in Auckland to kickstart 2017. Photos by Maria Stefina.

Kiwi channel reunites as After Hours kicks off 2017
Show Comments