Threat Description



Category: Malware
Type: Trojan
Platform: SymbOS
Aliases: Singlejump.E, SymbOS/Skudoo.B


The Singlejump.E (renamed Onehop.E) is a combination of several previous Skulls variants. Singlejump.E contains component files from Skulls.D and Skulls.N among other variants.

Singlejump.E also drops several Cabir variants on the phone and component files Doomboot.A 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.

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

The Doomboot component dropped by Singlejump.E prevents phone from rebooting, so if your phone is infected with Singlejump.E, it is critical not to reboot the phone.

As Singlejump.E breaks the application manager and application installer, the only currently working method of disinfection works with phones that have removable memory card.


F-Secure Mobile Anti-Virus for Symbian detects this malware starting from the

Detection Type: Mobile
Database: update build number 15

Description Details: Jarno Niemela September 26th, 2005
Description Last Modified: Mika Tolvanen, February 15, 2006


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