ESET researchers have analysed a newly discovered set of apps on Google Play, Google’s official Android app store, that pose as security applications. Instead of security, all they provide is unwanted ads and ineffective pseudo-security.
According to AV-Comparatives, an independent testing organisation, there are significant differences in the level of protection provided by mobile security solutions. However, even the poorest of them are still far better than questionable apps that impersonate security applications in order to display ads to users. Thirty-five such applications have recently been discovered in the Google Play Android app store.
These ads have flown under the radar for years, with Google Play statistics showing a minimum of over six million installs, cumulatively. However, not all those were necessarily real installations: it’s a common practice to make fake downloads by bots that subsequently post positive reviews and improve their respective app’s ratings.
All 35 apps have been flagged by ESET and removed from the store.
On top of annoying their victims with ads, disguising these apps as security software has some serious negative side effects, too. In mimicking basic security functions, in fact they all act as very primitive security checkers relying on a few trivial hardcoded rules, and they often detect legitimate apps as malicious. And last but not least, they create a false sense of security in the victims, which might expose them to real risks from malicious apps that are not detected as such.
ESET’s analysis has shown that among these 35 apps, only a handful stand out for their specific features: one app is not completely free as it offers a paid upgrade; one app has implemented a primitive, easily bypassed, app-locker manager; another app flags other apps from this group as dangerous by default; and finally, one misuses ESET’s branding.
In order to stay under the radar, all the shady ad-displaying apps mimic actual mobile security solutions. However, their ‘detection mechanisms’ are incomplete and very primitive , which makes them easy to bypass and prone to false positives.
Additional security ‘functionality’
Some of the questionable security apps are capable of protecting a user’s apps with a password or a pattern locker. The idea behind this seemingly useful feature is to provide the user with another layer of security in selected apps. However, due to insecure implementation, this feature also fails to provide true security to the user.
The problem is that relevant information is not stored safely on the device. Instead of using encryption, which is common baseline practice in cybersecurity, these apps store the names of locked apps and the passwords to unlock them as plaintext. This means that the data can be accessed after the device is rooted.
Besides compromising the unencrypted data by rooting the phone, there is another way to bypass the app lock. An attacker with physical access to the device can change the app-locking password without knowing the old one.
Conclusion
Having a security solution installed in an Android phone is definitely a good thing. However, not all apps featuring ‘security’ or ‘antivirus’ in their name do what the name promises. Before installing a security solution, think twice: is it really a tool you can safely rely on?
The 35 pseudo-security apps described in this article are not, say, ransomware or other hardcore malware. The only harm they do is displaying annoying ads, making false-positive detections and giving the victim a false sense of security. However, those millions of unwary users who downloaded them could easily have ended up downloading true malware in some similar disguise.
Instead of shady apps with flashy names and icons and outlandish, unsubstantiated promises, seek a reputable security solution. And which one to choose? An independent test by a well-respected testing organisation might help.
Beware ad slingers thinly disguised as security apps.
© Technews Publishing (Pty) Ltd. | All Rights Reserved.
printer friendly version