HARTMANN BAU

HARTMANN BAU was compromised in a ransomware attack attributed to dragonforce in March 2026. The organization, operating in the Construction sector in Germany, was added to the group's data leak site as part of an extortion campaign.

dragonforce 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.

Hartmann Bau GmbH is a construction company based in Borgentreich near Kassel, specializing in residential, commercial, agricultural, and civil engineering proj...

Intelligence correlations link this incident to 1 vulnerability(ies) including CVE-2025-5777, which may have been leveraged as initial access vectors or for lateral movement.