Skulls.T, SymbOS/Skulls.T


Skulls.T is a SIS file trojan that pretends to be installation file for Bluetooth range extender software.


Disinfection with two Series 60 phones

Download F-Skulls tool from our FTP server to your computer or to a clean phone, then:

  • 1. Install F-Skulls.sis into infected phones memory card with a clean phone
  • 2. Put the memory card with F-Skulls into infected phone
  • 3. The F-Skulls starts automatically upon insertion and frees menu and application manager
  • 4. Go to application manager and uninstall the SIS file in which you installed the Skulls.U
  • 5. Download and install F-Secure Mobile Security on your computer to remove other malware dropped by the Skulls.T, or directly onto the mobile itself
  • 6. Remove the F-Skulls with application manager as the phone is now cleaned
Find out more

Knowledge Base

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User Guide

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Submit a sample

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Technical Details

Spreading in: Bluetoothextender.sis

When installed Skulls.T disables several built in applications, drops component files from Locknut.A, Doomboot.A and installs Cabir.B and Cabir.M

In addition of directly installing damaging files, Skulls.T also drops Locknut.C and Commwarrior.C into the device.

Skulls.T also installs a pirate copied version of Simworks Anti-Virus into the device.

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