Singlejump.C (renamed Onehop.C) is a malicious SIS file dropper, that disables most well known third party file managers and Anti-Virus software. It uses modified Cabir to send itself forward and drops Singlejump.B torjan.
The modified Cabir is started automatically when the Singlejump.C is installed and will start spreading. When spreading from infected phone, the SIS files it sends will contain only the Singlejump.B.
Singlejump.C tries to disable F-Secure Mobile Anti-Virus by replacing it's files with non-functional versions. However as F-Secure Mobile Anti-Virus is capable of detecting Singlejump.C by using generic detection. The Anti-Virus will detect the infected SIS file and prevent it from being installed. Provided that the Anti-Virus is in realtime scan mode as it is by default.
For full disinfection of Singlejump.C you need help of another Series 60 phone that is not infected with the trojan, and clean memory card on that phone.
Download F-Skulls tool from ftp://ftp.f-secure.com/anti-virus/tools/f-skulls.zip or directly with phone http://www.europe.f-secure.com/tools/f-skulls.sis
When installed Singlejump.C will replace most common third party file managers, Anti-Virus programs and application installer with non-functional versions.
Disables following applications
F-Secure Mobile Anti-Virus for Symbian detects this malware starting from the
Detection Type: Mobile
Database: update build number 15