The Threat:
A new Trojan affecting Android devices has recently emerged in China. Dubbed “Geinimi” based on its first known incarnation, this Trojan can compromise a significant amount of personal data on a user’s phone and send it to remote servers. The most sophisticated Android malware we’ve seen to date, Geinimi is also the first Android malware in the wild that displays botnet-like capabilities. Once the malware is installed on a user’s phone, it has the potential to receive commands from a remote server that allow the owner of that server to control the phone.
Who is affected?
Currently we only have evidence that Geinimi is distributed through third-party Chinese app stores. To download an app from a third-party app store, Android users need to enable the installation of apps from “Unknown sources” (often called “sideloading”). Geinimi could be packaged into applications for Android phones in other geographic regions. We have not seen any applications compromised by the Geinimi Trojan in the official Google Android Market.
How to Stay Safe:
- Only download applications from trusted sources, such as reputable application markets. Remember to look at the developer name, reviews, and star ratings.
- Always check the permissions an app requests. Use common sense to ensure that the permissions an app requests match the features the app provides.
- Be aware that unusual behavior on your phone could be a sign that your phone is infected. Unusual behaviors include: unknown applications being installed without your knowledge, SMS messages being automatically sent to unknown recipients, or phone calls automatically being placed without you initiating them.
- Download a mobile security app for your phone that scans every app you download. Lookout users automatically receive protection against this Trojan.
