Threat Description



Category: Malware
Platform: W32
Aliases: Skulls.E, SymbOS/Skulls.E


Skulls.E is a new variant of Skulls SIS file trojan. Is drops slightly modified Cabir.F on to the device, and disables built in applications.

The Skulls.E is still under analysis, further details will be published in near future.


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details

Installation to system

Skulls.E is a SIS file that replaces system ROM binaries related to bluetooth control, drops Cabir.F and other applications into the system and disables third party file managers.

Spreading in: "ThNdRbRd !.sis"


Replaces built in and third party applications with non-functional ones, installs Cabir.F worm.


Generic detection that detects Skulls.E was published for F-Secure Mobile Anti-Virus on December 13th, 2004 in

Detection Type: Mobile
Database: database build number 15

Description Details: Jarno Niemela March 8th, 2005;


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