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CERUMO Co., Ltd Ransomware Attack

Ransomware victimRansomed

nightspireGroup

JapanCountry

Aug 19, 2026Discovered

Overview

View group profile

Industry

Manufacturing

Country

Japan

Discovered

about 1 month ago

Confidence

90%

Severity

Medium

Status

Claimed

Threat group

nightspire

Total victims

192

First seen

Oct 2025

Last seen

Sep 2026

Group status

active

Sophistication

Impact score

Threat level

2.8/10

Aggressiveness6/10

Lethality0/10

Criticality2.4/10

Status breakdown

Claimed

this victim

100.0%192

Targeted sectors

Education Energy & Utilities Financial Services Government & Defense Healthcare Hospitality Manufacturing Other Professional Services Retail & E-Commerce Technology Transportation

Victim's position within group

Industry

Manufacturing

Known target sector

Country

Japan

Frequently targeted country

Other victims

View all (192)

Same group · nightspire

Great Bay Bio
Hong Kong
Claimed
Özel ve Özel Avukatlık Bürosu
Turkey
Claimed
Transportes Montejo
Colombia
Claimed
DiamondLease
United Arab Emirates
Claimed
Perimetral Oriental de Bogotá S.A.S.
Colombia
Claimed
CERUMO Co., Ltd
Japan
Claimed

Group activity

Monthly attacks · nightspire

192

total · avg 16/mo