Your Android device could be at risk from a new class of attack that allows for full takeover of the smartphone. Researchers at Georgia Tech recently discovered an attack known as Cloak and Dagger. It gives cyberattackers the opportunity to undertake malicious control of an Android device without users noticing the errant activity.

Overall, malicious malware is becoming a frequent issue in the app marketplace. Researchers recently uncovered several Android apps that masqueraded as a Funny Videos app on the Google Play Store but distributed a banking Trojan.

How Is Your Device Affected?

The Cloak and Dagger attack abuses a pair of legitimate app permissions that are used across certain features on Androids. These permissions are known as SYSTEM_ALERT_WINDOW (“draw on top”) and BIND_ACCESSIBILITY_SERVICE (“a11y”). The first permission allows apps to overlap on a device’s screen, and the second lets disabled users enter inputs via voice commands.

Abuse of these permissions makes it easier for cybercriminals to potentially develop and then submit a malicious app to Google Play Store. Mashable reported that an actor could use these accepted permissions paired with a “God-Mode” app to access messages and calls, keylog and clickjack a smartphone.

In this specific attack case, the user does not necessarily need to grant permission and is not even notified of a change in device behavior. In fact, the researchers performed a 20-person user study, and no one could detect malicious activity.

How Is the Issue Being Resolved?

These attacks affect all recent versions of Android, including 7.1.2, and researchers suggested that the flaws are not yet fixed. They also said the problem could be difficult to resolve because the issues involve two standard features in Android OS.

A Google spokesperson told The Register that the technology giant has been in close contact with the researchers in Georgia. The spokesperson added the company refreshed Google Play Protect to prevent the installation of malware and detect any similar malicious apps in the future.

Google said it already built new security protections into Android O that will strengthen protection in the future. However, Google O is scheduled for release later this year, and users will need to wait for higher levels of protection.

How Should Users React?

Georgia Tech said users should check which applications have access to the draw on top and the a11y permissions. They can also disable the draw on top permission used in Android 7.1.2.

The Hacker News explained the most comprehensive way to avoid hacking is to download apps from trusted and verified developers in the Google Play Store. The article also advised users to check for app permissions before installation.

News of this attack comes in the wake of a continuing run of stories involving mobile malware and banking Trojans. Users should stay alert to potential security risks and ensure app permissions are both monitored and restricted. If an app seems to ask for more permissions than necessary, avoid it all together.

More from

Detecting Insider Threats: Leverage User Behavior Analytics

3 min read - Employees often play an unwitting role in many security incidents, from accidental data breaches to intentional malicious attacks. Unfortunately, most organizations don’t have the right protocols and processes to identify potential risks posed by their workforce. Based on a survey conducted by SANS Institute, 35% of respondents said they lack visibility into insider threats, while 30% said the inability to audit user access is a security blind spot in their organizations. In addition, the 2023 X-Force Threat Intelligence Index reported that…

3 min read

Poor Communication During a Data Breach Can Cost You — Here’s How to Avoid It

5 min read - No one needs to tell you that data breaches are costly. That data has been quantified and the numbers are staggering. In fact, the IBM Security Cost of a Data Breach estimates that the average cost of a data breach in 2022 was $4.35 million, with 83% of organizations experiencing one or more security incidents. But what’s talked about less often (and we think should be talked about more) is how communication — both good and bad — factors into…

5 min read

Increasingly Sophisticated Cyberattacks Target Healthcare

4 min read - It’s rare to see 100% agreement on a survey. But Porter Research found consensus from business leaders across the provider, payer and pharmaceutical/life sciences industries. Every single person agreed that “growing hacker sophistication” is the primary driver behind the increase in ransomware attacks. In response to the findings, the American Hospital Association told Porter Research, “Not only are cyber criminals more organized than they were in the past, but they are often more skilled and sophisticated.” Although not unanimous, the…

4 min read

Ransomware Renaissance 2023: The Definitive Guide to Stay Safer

2 min read - Ransomware is experiencing a renaissance in 2023, with some cybersecurity firms reporting over 400 attacks in the month of March alone. And it shouldn’t be a surprise: the 2023 X-Force Threat Intelligence Index found backdoor deployments — malware providing remote access — as the top attacker action in 2022, and aptly predicted 2022’s backdoor failures would become 2023’s ransomware crisis. Compounding the problem is the industrialization of the cybercrime ecosystem, enabling adversaries to complete more attacks, faster. Over the last…

2 min read