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Graymatter Ransomware Attack

graymatter.comRansomed

sinobiGroup

United KingdomCountry

Feb 20, 2026Discovered

Overview

View group profile

Domain

graymatter.com

Industry

Technology

Country

United Kingdom

Discovered

8 months ago

Attack date

Feb 19, 2026

Confidence

100%

Severity

Medium

Status

Claimed

Threat group

sinobi

Total victims

197

First seen

Oct 2025

Last seen

May 2026

Group status

active

Sophistication

Impact score

Threat level

2.6/10

Aggressiveness5/10

Lethality0/10

Criticality2.7/10

Status breakdown

Claimed

this victim

100.0%197

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

Technology

Known target sector

Country

United Kingdom

Frequently targeted country

Other victims

View all (197)

Same group · sinobi

Group activity

Monthly attacks · sinobi

197

total · avg 28.1/mo