Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Mobile

SLocker Ransomware Variants Surge

SLocker, one of the top 20 Android malware families, has seen a six-fold increase in the number of new versions over the past six months.

New variants of an Android ransomware family have surged over the past six months to some 600 unique versions.

That's a dramatic jump from the 100 variants created between October to the start of December, says Michael Covington, vice president of product strategy for Wandera, which published new data on the ransomware today.

The new strains of the mobile ransomware use a range of disguises to avoid detection. The SLocker variations are repackaged as altered icon, for example, or offer unique resources and executable files. SLocker encrypts images, documents, and videos, as well as blocks access to the device before demanding payment to unlock the phone and its contents.

Chief security officers and their teams have reason to worry about the rapid rise in the number of SLocker strains, say security experts. The malware has morphed beyond just locking users' screens on their Android devices and demanding payment, to taking over administrative rights and controlling the device, including its microphone, speakers, and the camera.

Bogdan Botezatu, senior e-threat analyst with Bitdefender, says an Android smartphone infected with SLocker could potentially broadcast highly sensitive information presented during a closed-door boardroom meeting without the user's knowledge, for example.

Wandera's Covington points to potential risks to sales and consulting staff, for example. "In a lot of situations where the employees work out in the field like in sales or consulting, it can have a massive impact on their business if they are locked out of their phone and data," he explains.

Victim organizations paid an estimated $10 million in ransom to unlock confidential data stored on Android phones that fell victim to SLocker, according to Wandera's report.

By the Numbers

Android ransomware first emerged in 2014, after creators of the Reveton/IcePol ransomware for PCs turned their attention to Android devices and cooked up the Android.Trojan. Koler.A and then later Android.Trojan.SLocker, according to Bitdefender's Botezatu.

For the first two years, SLocker was among the top 20 Android malware families and then shot up to the top 10 in 2016, notes Botezatu. "Its rise to the top 10 was mostly because of the frustration factor. It's a psychological thing when people can't get information from their smartphone," he says. "People were willing to pay the ransom. The mobile device is more personal than the personal computer."

But now SLocker ranks in the No. 14 to No. 18 spot among the top 20 Android malware families, as cyberthieves create new types of Android malware and enlarge the pool of contenders and dilute SLocker's influence, Botezatu says.

Related Content:

Dawn Kawamoto is an Associate Editor for Dark Reading, where she covers cybersecurity news and trends. She is an award-winning journalist who has written and edited technology, management, leadership, career, finance, and innovation stories for such publications as CNET's ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Oldest First  |  Newest First  |  Threaded View
US Turning Up the Heat on North Korea's Cyber Threat Operations
Jai Vijayan, Contributing Writer,  9/16/2019
MITRE Releases 2019 List of Top 25 Software Weaknesses
Kelly Sheridan, Staff Editor, Dark Reading,  9/17/2019
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: "He's too shy to invite me out face to face!"
Current Issue
7 Threats & Disruptive Forces Changing the Face of Cybersecurity
This Dark Reading Tech Digest gives an in-depth look at the biggest emerging threats and disruptive forces that are changing the face of cybersecurity today.
Flash Poll
The State of IT Operations and Cybersecurity Operations
The State of IT Operations and Cybersecurity Operations
Your enterprise's cyber risk may depend upon the relationship between the IT team and the security team. Heres some insight on what's working and what isn't in the data center.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2019-16669
PUBLISHED: 2019-09-21
The Reset Password feature in Pagekit 1.0.17 gives a different response depending on whether the e-mail address of a valid user account is entered, which might make it easier for attackers to enumerate accounts.
CVE-2019-16656
PUBLISHED: 2019-09-21
joyplus-cms 1.6.0 allows remote attackers to execute arbitrary PHP code via /install by placing the code in the name of an object in the database.
CVE-2019-16657
PUBLISHED: 2019-09-21
TuziCMS 2.0.6 has XSS via the PATH_INFO to a group URI, as demonstrated by index.php/article/group/id/2/.
CVE-2019-16658
PUBLISHED: 2019-09-21
TuziCMS 2.0.6 has index.php/manage/notice/do_add CSRF.
CVE-2019-16659
PUBLISHED: 2019-09-21
TuziCMS 2.0.6 has index.php/manage/link/do_add CSRF.