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

10/13/2017
04:55 PM
50%
50%

DoubleLocker Delivers Unique Two-Punch Hit to Android

Combines Android ransomware with capability to change users device PINs.

Android users downloading a fake Adobe Flash Player from a malicious website may find themselves victimized by a unique strain of Android ransomware called DoubleLocker, ESET researchers disclosed today.

DoubleLocker, which was discovered in the wirld in August, will not only encrypt users' Android device data, but it takes the additional step of changing the device PIN, according to Lukas Stefanko, ESET malware researcher.

"The most interesting thing here is that it uses a dangerous combination of three aspects we have not seen before: accessibility services, which performs a click on the user's behalf; it encrypts data; and it can reset a PIN for a user's device," Stefanko told Dark Reading.

DoubleLocker was created based on mobile banking malware that misuses accessibility services to gain control over the infected device.

The bogus Adobe Flash player, asks to activate a bogus version of "Google Play Service" through the malware's accessibility service. 

"There are no exploited vulnerabilities, they're just using the system as it is designed," Stefanko says.

Once DoubleLocker secures accessibility permissions, it leverages them to snag administrator rights for the device and establishes itself as the default Home application without the user's approval.

As the default home app, or launcher, DoubleLocker is activated after the user presses the home button. It then changes the PIN and sets it to a random value that is not stored on the device or sent out, according to ESET's report. As a result, neither the user or security teams can recover the PIN. If a user pays the ransom, the attacker remotely resets the PIN and unlocks the device.

DoubleLocker can also act as traditional ransomware and encrypt files in the primary storage directory on the device. Users will realize they have been attacked if they find the ".cryeye" filename extension, according to ESET.

To Pay or Not to Pay

DoubleLocker demands 0.0130 Bitcon, or roughly $54, in ransom, and victims are ordered to make a payment within 24 hours. If they do so, they get their data back.

Meanwhile, there is a way to reset a hijacked PIN, according to ESET's report.

Devices that have not been rooted and are without a mobile device management system that can reset the PIN can be restored with a factory reset. While that will remove the PIN lock screen, it will also delete whatever data was on the device.

For devices that are rooted and have debugging enabled in the settings, a user can connect the device by the Android Debug Bridge (ADB) and remove the file where the PIN is stored, ESET advises.

Join Dark Reading LIVE for two days of practical cyber defense discussions. Learn from the industry’s most knowledgeable IT security experts. Check out the INsecurity agenda here.

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
 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Oldest First  |  Newest First  |  Threaded View
johnp140
100%
0%
johnp140,
User Rank: Apprentice
2/16/2018 | 2:31:36 AM
DoubleLocker
Malware specialists have recently found another variant of Android infection that may fill in as a saving money trojan and versatile ransomware. Known as DoubleLocker, malware, is by all accounts identified with Erricson Routers Customer Service the Svpeng keeping money trojan. Be that as it may, this pernicious program is by all accounts more advanced.
COVID-19: Latest Security News & Commentary
Dark Reading Staff 7/2/2020
Ripple20 Threatens Increasingly Connected Medical Devices
Kelly Sheridan, Staff Editor, Dark Reading,  6/30/2020
DDoS Attacks Jump 542% from Q4 2019 to Q1 2020
Dark Reading Staff 6/30/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
How Cybersecurity Incident Response Programs Work (and Why Some Don't)
This Tech Digest takes a look at the vital role cybersecurity incident response (IR) plays in managing cyber-risk within organizations. Download the Tech Digest today to find out how well-planned IR programs can detect intrusions, contain breaches, and help an organization restore normal operations.
Flash Poll
The Threat from the Internetand What Your Organization Can Do About It
The Threat from the Internetand What Your Organization Can Do About It
This report describes some of the latest attacks and threats emanating from the Internet, as well as advice and tips on how your organization can mitigate those threats before they affect your business. Download it today!
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-9498
PUBLISHED: 2020-07-02
Apache Guacamole 1.1.0 and older may mishandle pointers involved inprocessing data received via RDP static virtual channels. If a userconnects to a malicious or compromised RDP server, a series ofspecially-crafted PDUs could result in memory corruption, possiblyallowing arbitrary code to be executed...
CVE-2020-3282
PUBLISHED: 2020-07-02
A vulnerability in the web-based management interface of Cisco Unified Communications Manager, Cisco Unified Communications Manager Session Management Edition, Cisco Unified Communications Manager IM & Presence Service, and Cisco Unity Connection could allow an unauthenticated, remote attack...
CVE-2020-5909
PUBLISHED: 2020-07-02
In versions 3.0.0-3.5.0, 2.0.0-2.9.0, and 1.0.1, when users run the command displayed in NGINX Controller user interface (UI) to fetch the agent installer, the server TLS certificate is not verified.
CVE-2020-5910
PUBLISHED: 2020-07-02
In versions 3.0.0-3.5.0, 2.0.0-2.9.0, and 1.0.1, the Neural Autonomic Transport System (NATS) messaging services in use by the NGINX Controller do not require any form of authentication, so any successful connection would be authorized.
CVE-2020-5911
PUBLISHED: 2020-07-02
In versions 3.0.0-3.5.0, 2.0.0-2.9.0, and 1.0.1, the NGINX Controller installer starts the download of Kubernetes packages from an HTTP URL On Debian/Ubuntu system.