Trojan:SymbOS/Singlejump is a family of trojans that infect devices running the Symbian operating system. On execution, variants in the family replace built-in and third party applications on the device with components that reset the phone if launched.
Singlejump variants also use variants from the Bluetooth-Worm:SymbOS/Cabir family to distribute other trojans to new victim devices. The Cabir worm is started automatically when the malware is first installed; if the device is rebooted, the Cabir worm will simply start again.
Instead of sending a copy of itself, the Cabir variant loads the SIS file installed by Singlejump and sends it to the first phone it finds within Bluetooth range.
In most cases, these trojans doesn't send themselves further than a single new victim, so its quite obvious how this malware got its name.
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