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Ransomware Victim Telecommunication

Netstar Australia PTY Ltd

Ransomware attack by Blackshrantac · Disclosed December 17, 2025 · 🇦🇺 Australia

netstar.com.au

Date Disclosed
Dec 17, 2025
2025
Threat Group
Blackshrantac
43 total victims
Country
🇦🇺 Australia
Industry
Telecommunication

Incident Analysis

Netstar Australia PTY Ltd was targeted by Blackshrantac ransomware, one of the most active ransomware groups in our database with 43 confirmed victims globally. The attack was disclosed on December 17, 2025, when Netstar Australia PTY Ltd appeared on the group's dark web leak site.

Netstar Australia PTY Ltd is based in Australia , operating in the Telecommunication sector. Australia ranks #10 globally for ransomware attacks, with 360 victims in our database.

Sector context: Organisations in this sector hold valuable data and operational systems that ransomware groups seek to exploit for financial gain through encryption and data exfiltration.

Blackshrantac typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats — paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Aug 6, 2026 06:00 UTC.

Frequently Asked Questions

Was Netstar Australia PTY Ltd attacked by ransomware?

Yes. Netstar Australia PTY Ltd was listed as a victim of the Blackshrantac ransomware group on December 17, 2025. The organisation is based in Australia and operates in the Telecommunication sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Netstar Australia PTY Ltd?

Netstar Australia PTY Ltd was attacked by Blackshrantac ransomware. Blackshrantac is one of the most active ransomware groups, having claimed 43 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Netstar Australia PTY Ltd ransomware attack occur?

The ransomware attack on Netstar Australia PTY Ltd was disclosed on December 17, 2025. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the Netstar Australia PTY Ltd ransomware attack?

The specific data stolen from Netstar Australia PTY Ltd has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Telecommunication organisation, Netstar Australia PTY Ltd likely held sensitive business data, client information, and operational records.

How can organisations protect against Blackshrantac attacks?

To defend against Blackshrantac and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.