Ref: http://www.fssr.ru/hz.php?name=News&file=article&sid=9409 This scheme uses prepaid SIM cards, which can send SMS messages to so called short numbers (http://en.wikipedia.org/wiki/Short_code) The person coducting fraud rents these numbers so he collects fees from each incoming SMS. Fraud scheme: For each number, the prepaid number balance is periodically requested from the Carrier. As soon as billing system becomes temporally unavailable,the time window is used to launch a flood of SMS messages to "short numbers" so prepaid card balance becomes negative. Status: to be verified |