The Department of technical security of the mobile operator MTS in the night of Friday, turned off the SMS service, opposition activist Oleg Kozlovsky. As reported by Meduza, he was told in service support operator.
As claimed by Kozlowski, SMS service was disabled in 2:25 GMT the night of April 29 and included in the 4:55 GMT. Thus in three hours of the night, the attackers, according to him, included in the account of the activist in the Telegram, entering a secret code that is delivered by SMS. The causes of disable and enable SMS service in the support service of MTS declined to name, offered to write a written request, says Meduza.
“Any purposeful action on disabling the services was not made, information about the service is terminated by employee of MTS is untrue”, — said the representative of MTS Dmitry Solodovnikov. The company does not exclude that it could be a viral attack or the account access was obtained through a web interface.
That account Kozlowski in the Telegram on the night of Friday has been hacked, the activist said in his Twitter this morning. Simultaneously with the hacking of his account, the attackers gained access to the Telegram officer of the Fund of struggle against corruption (FBK) George Alborov, what he also said in his microblog.
The technical support staff of the messenger said Alborov, as he writes that the entry to his account was made by code that, as in the case with Kozlowski, came via SMS. On the servers Telegram came the reply from the mobile operator (they were also MTS) that the message was not delivered to the addressee — he SMS-service at the time of the break-in was also disabled.