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Ransomware Victim Technology

Hollysys Asia Pacific

Ransomware attack by Crypto24 ยท Disclosed December 1, 2025 ยท ๐Ÿ‡ธ๐Ÿ‡ฌ Singapore

www.hollysys.com

Date Disclosed
Dec 1, 2025
2025
Threat Group
Crypto24
46 total victims
Country
๐Ÿ‡ธ๐Ÿ‡ฌ Singapore
Industry
Technology

Incident Analysis

Hollysys Asia Pacific was targeted by Crypto24 ransomware, one of the most active ransomware groups in our database with 46 confirmed victims globally. The attack was disclosed on December 1, 2025, when Hollysys Asia Pacific appeared on the group's dark web leak site.

Hollysys Asia Pacific is based in Singapore , operating in the Technology sector. Singapore ranks #16 globally for ransomware attacks, with 154 victims in our database.

Sector context: Technology companies hold intellectual property, customer data, and source code โ€” all highly valuable assets. A successful ransomware attack can also put downstream customers at risk through supply chain exposure.

Crypto24 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 โ€” 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 5, 2026 16:00 UTC.

Frequently Asked Questions

Was Hollysys Asia Pacific attacked by ransomware?

Yes. Hollysys Asia Pacific was listed as a victim of the Crypto24 ransomware group on December 1, 2025. The organisation is based in Singapore and operates in the Technology sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Hollysys Asia Pacific?

Hollysys Asia Pacific was attacked by Crypto24 ransomware. Crypto24 is one of the most active ransomware groups, having claimed 46 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Hollysys Asia Pacific ransomware attack occur?

The ransomware attack on Hollysys Asia Pacific was disclosed on December 1, 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 Hollysys Asia Pacific ransomware attack?

The specific data stolen from Hollysys Asia Pacific 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 Technology organisation, Hollysys Asia Pacific likely held source code, intellectual property, and customer data.

How can organisations protect against Crypto24 attacks?

To defend against Crypto24 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.