Authorities in Poland have arrested four members of an organized cybercrime group accused of breaching telecommunications partners and hijacking email accounts to carry out SIM-swapping attacks.
The operation was carried out by the Polish Cybercrime Bureau (CBZC) with support from the FBI and Homeland Security Investigations (HSI) in the United States.
According to investigators, the suspects carried out sophisticated cyberattacks to obtain data used in SIM-swapping attacks.
They hijacked victims' phone numbers, intercepted SMS messages and email communications, and ultimately gained control of accounts at cryptocurrency exchanges.
It is estimated that millions of U.S. dollars have been stolen this way and then laundered "via a distributed financial network."
