Cardtrap.H is a minor variation of Cardtrap.C, the main differences are
that Cardtrap.C does contain components from many other viruses and installs itself
completely in a memory card.
Cardtrap.H also drops components from SymbOS/Doomboot.A, which prevent the phone from
booting. So if your phone is infected with Cardtrap.H it is important not to reboot the phone
before disinfecting it.
Disinfection
The Cardtrap.H disables Application manager to prevent it's uninstallation but
it does not prevent installation of Anti-Virus. F-Secure Mobile Anti-Virus can
detect and disinfect the files Cardtrap.H uses to disable the phone.
1. Remove memory card from the phone
2. Open web browser on the phone
3. Go to http://mobile.f-secure.com
4. Select link "Download F-Secure Mobile Anti-Virus" and then select phone model
5. Download the file and select open after download
6. Install F-Secure Mobile Anti-Virus
7. Go to applications menu and start Anti-Virus
8. Activate Anti-Virus and scan all files. Anti-Virus then removes files that
block application manager and other critical functions
9. Insert memory card into phone
10. Go to application manager and uninstall the file in which the Cardtrap.H was
installed
Spreading in
Offical Symbian OS Update v80 ® 2005 Symbian Ltd.sis
Installation to system
When installed Cardtrap.H will replace the main executable of several
third party applications by overwriting their main executable file.
If any third party applications targeted by the trojan are installed
on the device, their main executable will be overwritten, and must be
reinstalled to repair the damage.
Payload
Disables most of the phone built in and several third party applications and drops
components from SymbOS/Doomboot.A
