The efficacy of mobile devices to actually produce cryptocurrency ter any meaningful amount is still doubtful. However, the effects on users of affected devices are clear: enlargened device wear and rip, diminished battery life, comparably slower vertoning.
This is not the very first time we’ve found thesis types of apps on app stores. Several years ago, wij found malicious apps on the Google Play store detected spil ANDROIDOS_KAGECOIN, a malware family with hidden cryptocurrency mining capabilities.
ANDROIDOS_JSMINER: Mining via Coinhive
Figures 1 and Two. JSMINER Malware on Google Play
Figure Three. Code to embark mining when the app starts
Figure Four. Webview is set to invisible mode
ANDROIDOS_CPUMINER: Trojanized versions of legitimate apps
Another family of malicious apps takes legitimate versions of apps and adds mining libraries, which are then repackaged and distributed. Wij detect thesis spil ANDROIDOS_CPUMINER.
One version of this malware is ter Google Play and disguised spil a wallpaper application:
Figure Five. Mining malware on Google Play store
The mining code emerges to be a modified version of the legitimate cpuminer library. The legitimate version is only up to Two.Five.0, whereas this malicious version uses Two.Five.1. The code is added to normal applications, spil seen below:
Figure 6. Code added to normal apps by CPUMINER
Please note that the above code layout wasgoed taken from a sample that is not found on Google Play, but belongs to the same family.
Figure 7. Malware with modified code
The mining code fetches a configuration opstopping from the cybercriminal’s own server (which uses a dynamic DNS service) that provides information on its mining pool via the Stratum mining protocol.
Figure 8. Cryptocurrency mining profits
The figure above shows that the attacker is mining various cryptocurrencies, with varying amounts of currencies mined. It also shows that the value of the coins mined overheen an unknown period amounts to just overheen 170 US dollars, total profits aren’t known.
Wij have identified a total 25 samples of ANDROIDOS_CPUMINER. Trend Micro Mobile Security already detects thesis variants, spil well spil the JSMINER variants mentioned earlier te this postbode.
Thesis threats highlight how even mobile devices can be used for cryptocurrency mining activities, even if, te practice, the effort results te an insignificant amount of profit. Users should take note of any spectacle degradation on their devices after installing an app.
Wij have reached out to Google, and the apps mentioned te this postbode are no longer on Google Play.
The following malicious apps were found on Google Play and are connected to this threat:
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