SymbOS.Cabir.F

SymbOS.Cabir.F is a proof-of-concept worm that replicates on Series 60 phones. The worm is a minor variant of SymbOS.Cabir.

The only differences are:

• The worm spreads as skulls.SIS.
• The worm creates MOD.MDL instead of FLO.MDL.
• The worm displays the following message after infection:
  
  skulls

The worm repeatedly sends itself to the first Bluetooth-enabled device that it can find, regardless of the type of device. For example, even a Bluetooth-enabled printer will be attacked if it is within range.

The worm spreads as a .SIS file, which is installed into the APPS directory. There is no payload, apart from the vastly shortened battery life caused by the constant scanning for Bluetooth-enabled devices.



Symantec recommends the following to protect against this threat:

• If Bluetooth is not required, it should be turned off.
• If you require the use of Bluetooth, ensure that the device's visibility setting is set to "Hidden" so that it can not be scanned by other Bluetooth devices.
• Avoid use of device pairing. If it must be used, ensure that all paired devices are set to "Unauthorized". This requires each connection request to be authorized by the user.
• Do not accept unsigned applications (no digital signature) or applications sent from unknown sources. Be absolutely sure of the origin of the application before accepting it.

Protection

• Initial Rapid Release version January 6, 2005
• Latest Rapid Release version August 20, 2008 revision 017
• Initial Daily Certified version January 6, 2005
• Latest Daily Certified version August 20, 2008 revision 016
• Initial Weekly Certified release date January 12, 2005

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

• Wild Level: Low
• Number of Infections: 0 - 49
• Number of Sites: 0 - 2
• Geographical Distribution: Low
• Threat Containment: Easy
• Removal: Easy

Damage

• Damage Level: Low

Distribution

• Distribution Level: Low