Threat Description



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


Skulls.I is an edited version of Skulls.D SIS file trojan, it contains several variants of Cabir worm, and several copies of Locknut.B trojan.


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.

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Technical Details


Replaces built in and third party applications with non-functional ones, installs Cabir worm variants, Locknut.B trojan and starts animation that shows flashing skull picture.


Generic detection that detects Skulls.I 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 29th, 2005;


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