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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

Locknut.A

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:Locknut.A
Technical name:SymbOS/Locknut.A
Threat level:Low
Type:Trojan
Effects:  

It only affects cellular phones that use the operating system Symbian. It blocks the cellphone, as it replaces some operating system components. Some variants also install the worm Cabir.A.

Affected platforms:

Symbian

First detected on:Feb. 2, 2005
Detection updated on:Feb. 2, 2005
StatisticsNo
Country of origin:RUSSIA

Brief Description 

    

Locknut.A is a Trojan that only affects cellular phones that use the operating system Symbian 7.0S or later.

Locknut.A passes itself off as a patch for the cellphone, thus attempting to trick the user into running it. Once it is run, Locknut.A replaces the operating system components, which prevents some applications from being run. As a result, the cellphone blocks.

Some variants of this Trojan install a copy of a Symbian worm, detected as SymbOS/Cabir.A.worm.

Keep in mind that Locknut.A needs the user intervention in order to be run on the cellphone. Before the malicious file is installed, the user receives a security warning.

Visible Symptoms 

    

Locknut.A is difficult to recognize, as it does not display any messages or warnings that indicate it has reached the computer.