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Otto Sieve GmbH Ransomware Attack

otto-sieve.deRansomed

stormGroup

GermanyCountry

Aug 27, 2026Discovered

Overview

View group profile

Domain

otto-sieve.de

Industry

Manufacturing

Country

Germany

Discovered

about 2 months ago

Attack date

Aug 24, 2026

Confidence

100%

Severity

Medium

Status

Claimed

Threat group

storm

Total victims

121

First seen

Aug 2026

Last seen

Oct 2026

Threat level

4.1/10

Aggressiveness10/10

Lethality0/10

Criticality1.9/10

Status breakdown

Data Leaked1.0%7

Negotiating0.3%2

Claimed

this victim

98.8%722

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

Germany

Not a listed target country

Other victims

View all (731)

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Group activity

Monthly attacks · storm

121

total · avg 40.3/mo