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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Skulls.B

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Skulls.B
Technical name:SymbOS/Skulls.B
Threat level:Low
Alias:SymbOS.Skulls, Skulls
Type:Trojan
Effects:  

It only affects cellular phones that use the operating system Symbian. It changes the application icons, and prevents the user from using most of the features of the cellphone. It installs the worm Cabir.A.

Affected platforms:

Symbian

First detected on:Nov. 30, 2004
Detection updated on:April 26, 2005
StatisticsNo

Brief Description 

    

Skulls.B is a Trojan that only affects cellular phones that use the operating system Symbian. Initially, it aims Nokia 7610 cellphones, but other devices based in the same software could also be affected.

Skulls.B changes all the icons into another icon belonging to a certain system application. At the same time, it blocks the cellphone menu, so that no other functionalities than calling and answering calls will be available.

Additionally, it installs files belonging to other malware affecting Symbian-based cellphones, detected as SymbOS/Cabir.A.worm.

Both Skulls.B and Cabir.A need the user intervention in order to be run on the cellphone. Before the malicious files are installed, the user receives a security warning.

Skulls.B has been distributed via forums specialized in cellular telephony.

Visible Symptoms 

    

Skulls.B is easy to recognize once it has affected the cellphone, as it changes all the application icons into a different one.