HatiHati is an alias for a legitimate anti-theft application which suffers from two bugs in the 0.95 beta version of its code, causing worm-like behavior on devices running Symbian Series 60 Second Edition and older. An unauthorized, repackaged version of this flawed version also exists.
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The anti-theft application was originally designed to send an SMS alert when it detects a change in the device's SIM card. If the device's MMC card is transferred to a new device however, the first bug in the code causes the application to copy itself onto the new device.
Once installed on the new device, the application considers the SIM card to be changed; the second bug then causes it to send a large number SMS messages to a predefined number, usually +3396003964. This may result in significant financial costs.
Detection of the 0.95 beta version of HatiHati was added to F-Secure Mobile Anti-Virus at the request of the original software author.