A bitcoin hacking group calling itself “DD4BC” which stands for “distributed denial of service for bitcoin” is allegedly targeting Australian banks like Macquarie and Westpac . These reported extortion campaigns have reportedly been running since May this year, prompting authorities to initiate a new cybersecurity outfit called the Australian Cybersecurity Center (ACSC). This follows news that Australian banks have discontinued transactions to several bitcoin companies by terminating their bank accounts, spurring speculations that the announcements may have something to do with the bitcoin hacking attacks.