Threat Intelligence

TheGentlemen Ransomware Group Claims Australian Government Agency Mandurah SES on Its Leak Site

ransomware.live · 3 Oct 2026

Key Takeaway Australian government and non-profit organisations, especially volunteer and emergency service bodies, should ensure strong backups, staff awareness training and incident response plans, since limited budgets can make them attractive targets regardless of data value.

The ransomware group known as TheGentlemen has listed Mandurah State Emergency Service (mandurahses.org.au) on its dark web leak site. This claim is unverified and the organisation has not confirmed any security incident.

Mandurah SES is a volunteer emergency rescue unit based in Greenfields, Western Australia, operating under DFES and marking its 50th anniversary in 2026. Ransomware groups frequently post listings during extortion attempts, and names on these sites are not confirmation of a successful breach; details can be wrong, exaggerated or entirely fabricated.

Government and non-profit bodies, including emergency services organisations, are increasingly targeted because they often hold sensitive personal and operational data while running on limited cybersecurity budgets. Other Australian organisations in this sector should treat such listings as a reminder to review their own defences rather than assume any wrongdoing on the part of the named entity.

ransomware dark web leak site thegentlemen Government & Defense Western Australia

Summarised by CISO AI from ransomware.live. We link back to every original so you can read it yourself.