mastercom.com.au Listed by incransom Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On April 11, 2026, the ransomware group incransom listed mastercom.com.au on its leak site. The entry states that internal files were exfiltrated from the Sydney-based provider of two-way radio networks.

The number of people affected is not known. No further details on the timing of the intrusion, the volume of data taken, or any subsequent actions by the organisation have been made public.

What happened

The available information indicates that internal files were removed from mastercom.com.au systems during a ransomware operation. The precise date of the intrusion, the method of initial access, and the quantity of material involved remain undisclosed. No confirmation of encryption or ransom payment has been reported.

The group behind it: incransom

Incransom is a ransomware operator that maintains a public leak site to list victims and, in some cases, to publish samples of stolen data. The group typically claims to have exfiltrated material before deploying encryption and uses the threat of further disclosure to pressure targets. Its listings are presented by the group itself and are not independently verified unless corroborated by the affected organisation or law-enforcement statements. In this instance the group claims to hold files from mastercom.com.au; that claim has not been confirmed by other sources.

mastercom.com.au and its sector

Mastercom.com.au supplies and maintains two-way radio communication networks for local government and emergency services in the Sydney region. It is a founding partner of the Orion Network and provides services to several New South Wales councils, including Newcastle, Maitland and Penrith. Organisations of this type routinely manage operational systems that support field workers and coordinate responses across varied terrain. A compromise at such a provider can affect the communications infrastructure relied upon by multiple public-sector entities.

What was likely exposed

The listing refers to internal files exfiltrated in the attack. The exact categories of data contained in those files have not been disclosed. Companies that design and support government radio networks commonly hold design documents, configuration records, maintenance logs, and contact details for client organisations. Whether any of these categories, or any personal information, were among the material removed cannot be confirmed from the information currently available.

Why it matters

Local-government radio networks carry operational traffic that can include sensitive location data and coordination details. Exposure of internal files could reveal network architecture or administrative credentials that affect multiple councils. For the organisation itself, the incident adds to the operational and reputational costs already associated with recovering from ransomware activity. Individuals whose information appears in the exfiltrated material face the standard risks of data appearing on criminal marketplaces, though the scale of any such exposure is not yet known.

What to do if you're exposed

Individuals who believe their information may have been involved should monitor their email and other accounts for unusual activity and enable multi-factor authentication where available. They can also run a free exposure scan of their email address against known breach data to determine whether their details have appeared in previously published sets. Organisations that use mastercom.com.au services should review any communications received from the provider regarding the incident and follow its guidance on credential changes or system checks.

AICompiled with AI assistance from public sources and published under our editorial standards.