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Cyber Threat
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Ransomware victim Manufacturing

Astemo, Ltd.

Listed by Metaencryptor on · organisation based in Japan

www.astemo.com/en

Disclosed
Sep 21, 2026
Leak-site listing date
Threat group
Metaencryptor
53 victims listed
Country
Japan
#11 most targeted
Sector
Manufacturing

ThreatAI analysis

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

About Astemo, Ltd.

Astemo operates worldwide as a global mega-supplier of automotive parts, with approximately 80,000 employees across the United States, Asia, China, Europe, and Japan. Through operations in three business segments (Electrification Business, Vehicle Business, and Motorcycle Business), we develop, manufacture, sell and service automotive parts, transportation and industrial machinery, equipment and systems.

Source record: ransomware.live

About the Metaencryptor group

MetaEncryptor is a ransomware group first observed in mid-2023, targeting medium-to-large enterprises in legal, technology, logistics, manufacturing, and finance sectors primarily in the UK, Europe, and Southeast Asia, using AES-256/RSA-2048 encryption and double extortion. Metaencryptor has listed 55 victims since August 2023.

Incident analysis

Astemo, Ltd. was listed by Metaencryptor ransomware, a group with 53 victims recorded in this database. The listing appeared on the group's leak site on September 21, 2026.

Astemo, Ltd. is based in Japan and operates in the Manufacturing sector. Japan ranks #11 worldwide for ransomware disclosures, with 294 victims in this database.

Sector context. Manufacturing companies are frequently targeted because production downtime directly translates to financial loss. Ransomware operators exploit this time-sensitivity to demand higher ransoms and faster payment.

Metaencryptor 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files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished.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 Astemo, Ltd. attacked by ransomware?

Yes. Astemo, Ltd. was listed as a victim of the Metaencryptor ransomware group on September 21, 2026. The organisation is based in Japan and operates in the Manufacturing sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Astemo, Ltd.?

Astemo, Ltd. was attacked by Metaencryptor ransomware. Metaencryptor is one of the most active ransomware groups, having claimed 53 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Astemo, Ltd. ransomware attack occur?

The ransomware attack on Astemo, Ltd. was disclosed on September 21, 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 Astemo, Ltd. ransomware attack?

The specific data stolen from Astemo, 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 Manufacturing organisation, Astemo, Ltd. likely held sensitive business data, client information, and operational records.

How can organisations protect against Metaencryptor attacks?

To defend against Metaencryptor 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.