CERT-Bund is a German government computer emergency response team focused on information security. One of the areas of work of CERT-Bund is the collection of information about criminal activity on the Internet: infection of systems with malware and the presence of vulnerable publicly available services, the features of which can be used by attackers against third parties.
More information about CERT-Bund can be found here: https://www.bsi.bund.de/EN/Topics/IT-Crisis-Management/CERT-Bund/cert-bund_node.html
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