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Nippon Steel Corporation Ransomware Attack

nipponsteel.comRansomed

metaencryptorGroup

JapanCountry

Sep 15, 2026Discovered

Overview

View group profile

Domain

nipponsteel.com

Industry

Manufacturing

Country

Japan

Discovered

3 days ago

Attack date

Sep 15, 2026

Confidence

100%

Severity

Medium

Status

Claimed

Threat group

metaencryptor

Total victims

First seen

Oct 2025

Last seen

Sep 2026

Group status

active

Sophistication

Impact score

Threat level

3.7/10

Aggressiveness7.8/10

Lethality0/10

Criticality3.3/10

Status breakdown

Claimed

this victim

100.0%17

Targeted sectors

Energy & Utilities Government & Defense Healthcare Manufacturing Other Professional Services Technology Transportation

Victim's position within group

Industry

Manufacturing

Known target sector

Country

Japan

Frequently targeted country

Other victims

View all (17)

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Beckman Coulter Diagnostics
United States
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United States
Claimed
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United States
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Nippon Steel Corporation
Japan
Claimed
EllisDon
Canada
Claimed
SIFCO Industries INC.
United States
Claimed

Group activity

Monthly attacks · metaencryptor

total · avg 4.3/mo