Wesber.A is a Java 2 Micro Edition (J2ME) based Java Midlet that sends SMS messages to a specific phone number. Wesber does not contain any social engineering tricks. Wesber sends SMS messages to one specific number and thus it may cause financial losses to the user of the infected phone.

Automatic action

F-Secure Mobile Anti-Virus is capable of detecting and deleting the Wesber.A trojan. It is also possible to remove the Wesber.A trojan by uninstalling it with the Symbian application manager.

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

Sending SMS Messages

Wesber.A contains a fixed phone number (1717) to which it will send SMS messages. The sending function of Wesber.A attempts to send the SMS message five times and then quits. Each of those messages will be charged to the user's account and each message requires the users approval.

Wesber.A is of Russian origin. The 1717 number that it dials is in service in Russia. If users in other locales install this trojan, then 1717 may or may not be a number in service.

The Trojan arrives in a .jar file, named 'pomoshnik.jar'. The .jar file also contains following images: