Speaking at the Virus Bulletin 2019 conference in London, Cybereason researchers Amit Serper, Mor Levi and Assaf Dahan discussed the “worldwide campaign against telecommunication providers” that they coined Operation Soft Cell. Described by Serper as an access operation which was a “multi-wave attack,” he said that the operation targeted call detail records (CDRs) which contain details of call information, where calls are made and the originating number and IMEI number.

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