Skulls.M is a variant of SymbOS/Skulls.A trojan, which has
similar functionality to the Skulls.A but uses different files.
Skulls.M is a malicious SIS file trojan that replaces the system
applications with non-functional versions and disables third party
applications that could be used to disinfect with such as FExplorer and
System Explorer.
Like Skulls.A the Skulls.M replaces the application icons with it's skull
icon, this time so that each replaced application has caption "Khalid"
If Skulls.M is installed only the calling from the phone and answering
calls works. All functions which need some system application,
such as SMS and MMS messaging, web browsing and camera no longer function.
If you have installed Skulls.M, the most important thing is not to
reboot the phone and follow the disinfection instruction in this
description.
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. Start up the infected phone, the application menu should work now
4. Go to application manager and uninstall the SIS file in which you installed the skulls variant
5. Remove the F-Skulls with application manager as the phone is now cleaned
Installation to system
Like Skulls.A Skulls.M is a SIS file that installs critical System ROM
binaries and Cabir.F worm into C: drive. The System ROM files
are installed with exact same names and locations as in the ROM drive.
Symbian operating system has a feature which causes any file that is
in C: drive replace file in ROM drive with identical name and location.
Spreading in
X-Ray Full byDotSis.SIS
Payload
Replaces built in and third party applications with non-functional ones.
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