T Online

T Online was compromised in a ransomware attack attributed to medusalocker in July 2026. The organization, operating in the Telecommunication sector in Germany, was added to the group's data leak site as part of an extortion campaign.

medusalocker operates as a financially motivated ransomware-as-a-service (RaaS) operation, exfiltrating sensitive data and threatening public disclosure to pressure victims into paying ransom demands.

Organization with 823 emails extracted. Domain: t-online.de