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DDoS threats being made against Australian organisations

The Australian Signals Directorate's Australian Cyber Security Centre (ACSC) is aware of a number of Denial of Service (DoS) for ransom threats being made against Australian organisations, primarily in the banking and finance sector.

Alert status
HIGH

The threats in question are delivered via email, and threaten the recipient with a sustained DoS attack unless a sum of the Monero cryptocurrency is paid. The actors behind these threats claim to be the ‘Silence Hacking Crew', however the ACSC is unable to verify this claim.

The ACSC cannot positively verify the legitimacy of any threats made by the actor. However, the ACSC has received no reports of the threats eventuating in DoS and is aware of a number of DoS threats made in the past against Australian organisations that did not eventuate.