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Qualisteel Ransomware Attack

qualisteel.comRansomed

medusalockerGroup

BrazilCountry

Aug 27, 2026Discovered

Overview

View group profile

Domain

qualisteel.com

Industry

Manufacturing

Country

Brazil

Discovered

about 1 month ago

Attack date

Aug 27, 2026

Confidence

90%

Severity

Medium

Status

Claimed

Threat group

medusalocker

Total victims

First seen

Nov 2025

Last seen

Oct 2026

Threat level

2.9/10

Aggressiveness7/10

Lethality0/10

Criticality1.5/10

Status breakdown

Claimed

this victim

100.0%84

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

Brazil

Not a listed target country

Other victims

View all (84)

Same group · medusalocker

Millensys
Brazil
Claimed
Rüegsegger AG
Switzerland
Claimed
PKSF — Palli Karma-Sahayak Foundation
Bangladesh
Claimed
Junta de Andalucía
Spain
Claimed
Premiumfruits
Spain
Claimed
ATCO Ltd
Canada
Claimed

Group activity

Monthly attacks · medusalocker

total · avg 12/mo