Threat Descriptions

Trojan:Android/Moghava

Classification

Category :

Malware

Type :

Trojan

Platform :

Android

Aliases :

Trojan:Android/Moghava, Trojan:Android/Moghava.A

Summary

Trojan:Android/Moghava repeatedly searches for and modifies JPEG images stored on the device.

Removal

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

Trojan:Android/Moghava was found being distributed in unofficial third party Android application websites in late 2011. Unlike most Android malware, it is not designed for monetary profit but for political ridicule.

Moghava.A.s malicious activity is triggered each time the device boots, activating a service named 'stamper'. This service waits for five minutes before searching for JPEG image files stored in the memory card, looking in the /sdcard/DCIM/Camera/ location in particular because that is where pictures taken from the device.s camera are stored.

For every found image file, it will superimpose another image on top of the original one. This routine will be repeated over and over in every five minutes, which effectively increases the size of the image file , and consumes the free space in the memory card.

This activity continues for a certain time interval before exiting.

More

This malware is discussed in further detail in: Q1 2012 Mobile Threat Report (PDF).