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Arnold Center Ransomware Attack

arnoldcenter.orgRansomed

QilinGroup

United StatesCountry

Sep 28, 2026Discovered

Overview

View group profile

Domain

arnoldcenter.org

Industry

Education

Country

United States

Discovered

11 days ago

Attack date

Sep 28, 2026

Confidence

100%

Severity

Medium

Status

Claimed

Threat group

Qilin

Total victims

1,476

First seen

Oct 2025

Last seen

Oct 2026

Group status

active

Sophistication

Impact score

123

Threat level

3.9/10

Aggressiveness10/10

Lethality0/10

Criticality1.3/10

Status breakdown

Data Leaked0.1%1

Claimed

this victim

99.9%1,475

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

Education

Known target sector

Country

United States

Frequently targeted country

Other victims

View all (1476)

Same group · Qilin

Group activity

Monthly attacks · Qilin

1,476

total · avg 113.5/mo