Was Astemo, Ltd. hit by ransomware?

Astemo, Ltd. was listed by the Metaencryptor ransomware operation (Japan), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Metaencryptor ransomware group?

Metaencryptor is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Astemo, Ltd. breach?

Metaencryptor published data attributed to Astemo, Ltd.. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Astemo, Ltd.

Claimed by Metaencryptor · listed 6 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedSep 21, 2026
Data leakeddate unknown

At a glance

Group: Metaencryptor
Status: Data leaked
Country: Japan
Sector: Manufacturing
Listed on leak site: Sep 21, 2026

About the victim

AI dossier — public-source company profile

Astemo, Ltd. is a global automotive supplier with approximately 80,000 employees across the United States, Asia, China, Europe, and Japan. The company operates three business segments (Electrification, Vehicle, and Motorcycle) developing, manufacturing, and servicing automotive parts, transportation machinery, industrial equipment, and systems including powertrain, chassis, brake, and autonomous driving solutions.

Industry: Automotive Parts & Systems Manufacturing
Employees: 80000

Attack summary

Severity: medium — Data has been published by the group (disclosed_status: data_published), indicating confirmed exfiltration. However, the truncated leak post provides no inventory of specific data types, scale, or sensitivity level, and no proof files are advertised. The attack affects a major global automotive manufacturer with significant operational footprint, elevating concern despite information limitations.

The metaencryptor group claims to have attacked Astemo and published data. No specific details are provided in the truncated leak post regarding encryption, exfiltration, or the nature of compromised data.

medium

What the group claims

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.

Sources

Source

Indexed 6 hours ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About Metaencryptor

Metaencryptor is a relatively new ransomware group that emerged in August 2023, operating with primarily financial motivations and targeting organizations across multiple sectors and geographical regions. The group appears to be an independent operation rather than a Ransomware-as-a-Service model, though limited public documentation makes definitive attribution challenging regarding their specific country of origin or connections to established cybercriminal networks. Based on their targeting patterns, Metaencryptor demonstrates a preference for manufacturing organizations, business services, and transportation/logistics companies, with their operations concentrated primarily in Western nations including Germany, the United States, Canada, Spain, and the United Kingdom. With 31 documented victims since their emergence, the group represents a moderate but persistent threat in the ransomware landscape. However, due to their recent emergence and relatively lower profile compared to major ransomware families, comprehensive technical analysis of their attack methodologies, encryption techniques, and specific initial access vectors has not been extensively documented by major cybersecurity firms or government agencies. The group's current operational status remains active as of available intelligence, though the limited public reporting suggests they operate with a smaller scale and lower visibility than prominent ransomware-as-a-service operations that typically attract more attention from law enforcement and security researchers. The group has been linked to 53 public disclosures across our corpus. First observed on a leak site on August 16, 2023; most recent post September 21, 2026. The operation is currently inactive.

Timeline of this disclosure

September 21, 2026Astemo, Ltd. listed by Metaencryptor on the group's public leak site

Other recent disclosures by Metaencryptor

Metaencryptor has been linked to 53 public victims on Darkfield. A sample of the most recent:

See the full Metaencryptor dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,696 disclosures indexed across all operators we track. Geographically, Astemo, Ltd. is reported in Japan, a country with 89 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Metaencryptor means Astemo, Ltd. appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, JPCERT/CC (Japan), as required for your jurisdiction.
Monitor for the data appearing on Metaencryptor's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.