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Cyber Threat
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Ransomware victim Professional Services

Jons Civil Engineering Company Ltd. (JCEL)

Listed by Majinahanashi on · organisation based in Ireland

jonscivil.ie

Disclosed
Oct 31, 2026
Leak-site listing date
Threat group
Majinahanashi
51 victims listed
Country
Ireland
#42 most targeted
Sector
Professional Services

ThreatAI analysis

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

About the Majinahanashi group

Majinahanashi has listed 22 victims since June 2026.

Incident analysis

Jons Civil Engineering Company Ltd. (JCEL) was listed by Majinahanashi ransomware, a group with 51 victims recorded in this database. The listing appeared on the group's leak site on October 31, 2026.

Jons Civil Engineering Company Ltd. (JCEL) is based in Ireland and operates in the Professional Services sector. Ireland ranks #42 worldwide for ransomware disclosures, with 70 victims in this 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.

Majinahanashi 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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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 Jons Civil Engineering Company Ltd. (JCEL) attacked by ransomware?

Yes. Jons Civil Engineering Company Ltd. (JCEL) was listed as a victim of the Majinahanashi ransomware group on October 31, 2026. The organisation is based in Ireland and operates in the Professional Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Jons Civil Engineering Company Ltd. (JCEL)?

Jons Civil Engineering Company Ltd. (JCEL) was attacked by Majinahanashi ransomware. Majinahanashi is one of the most active ransomware groups, having claimed 51 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Jons Civil Engineering Company Ltd. (JCEL) ransomware attack occur?

The ransomware attack on Jons Civil Engineering Company Ltd. (JCEL) was disclosed on October 31, 2026. 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 Jons Civil Engineering Company Ltd. (JCEL) ransomware attack?

The specific data stolen from Jons Civil Engineering Company Ltd. (JCEL) 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 Professional Services organisation, Jons Civil Engineering Company Ltd. (JCEL) likely held sensitive business data, client information, and operational records.

How can organisations protect against Majinahanashi attacks?

To defend against Majinahanashi 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.