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Cyber Threat
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Ransomware victim Financial Services

Cayman National Bank

Listed by Killsec on · organisation based in Cayman Islands

caymannational.com

Disclosed
Mar 21, 2025
Leak-site listing date
Threat group
Killsec
287 victims listed
Country
Cayman Islands
#160 most targeted
Sector
Financial Services

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for Killsec. Figures and technique mappings are quoted from the source data, not inferred.

About the Killsec group

KillSec originated as a hacktivist group aligned with the Anonymous movement before pivoting to ransomware operations in October 2023, officially launching a RaaS platform in June 2024 with an affiliate-friendly 88% revenue split, primarily targeting healthcare, financial services, and government sectors with over 250 documented victims as of late 2025. Killsec has listed 286 victims since February 2024.

Incident analysis

Cayman National Bank was listed by Killsec ransomware, a group with 287 victims recorded in this database. The listing appeared on the group's leak site on March 21, 2025.

Cayman National Bank is based in Cayman Islands and operates in the Financial Services sector. Cayman Islands ranks #160 worldwide for ransomware disclosures, with 2 victims in this database.

Sector context. Financial sector organisations are targeted for their access to funds, sensitive financial data, and the reputational damage a public breach can cause. Regulatory requirements also increase recovery costs.

Killsec typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was Cayman National Bank attacked by ransomware?

Yes. Cayman National Bank was listed as a victim of the Killsec ransomware group on March 21, 2025. The organisation is based in Cayman Islands and operates in the Financial Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Cayman National Bank?

Cayman National Bank was attacked by Killsec ransomware. Killsec is one of the most active ransomware groups, having claimed 287 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Cayman National Bank ransomware attack occur?

The ransomware attack on Cayman National Bank was disclosed on March 21, 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 Cayman National Bank ransomware attack?

The specific data stolen from Cayman National Bank 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 Financial Services organisation, Cayman National Bank likely held financial records, client data, and transaction histories.

How can organisations protect against Killsec attacks?

To defend against Killsec 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.