Threat Descriptons



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Trojan:Android/Exprespam silently gathers information from the affected device and forwards the data to a remote server.


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.

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 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.

Technical Details

Exprespam.A is a trojan that harvests personal information from an infected device. It has been circulating in the unofficial Android app market and targets Android users in Japan. During the installation process, it requests for permissions which will essentially allow it to access or view these items:

  • Accounts listed in the Account Service
  • Internet
  • Phone state
  • User’s contacts data

Exprespam.A places an icon on the main application menu. When clicked to launch, it will display a message.

Meanwhile in the background, it collects information such as phone numbers and contact details (i.e. names and email addresses) stored on the device. The collected information is later forwarded to a remote server, http://ftuk[...]

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