Trojan:Android/Tetus monitors incoming SMS messages and forwards the message contents to a remote server.

Automatic action

Once the scan is complete, the F-Secure security product will ask if you want to uninstall the file, move it to the quarantine or keep it installed on your device.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

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Technical Details

Tetus.A is an information stealing trojan disguised as an entertainment or social networking application, or a helper tool. It is distributed via a third-party Android app market, and may use the following package file names:

  • com.appsmediaworld.fitpal
  • com.appengines.fastphone
  • com.mobilityplus.friendly
  • com.coolmasterz.flirt
  • com.droidmojo.celebstalker
  • com.droidmojo.awesomejokes
  • com.stephbrigg5.batteryimprove
  • com.supersocialmob.allfriends
  • com.nogginfunsite.zgames

Tetus.A spies on incoming SMS messages. Once an event handler is successfully set, it will notify one of these command and control (C&C) servers:

  • http://[...]/android/[...]/
  • http://[...]/android-gaming-zone/[...]/.com

Whenever a new SMS message arrives, Tetus.A will turn the content into one long string (replacing spaces with ‘_’) and forward it to the C&C server. The server recognizes different infected devices by the International Mobile Equipment Identity (IMEI) number.