Die Cyberattacke auf die Technische Universität Berlin begann am 26. April. Angreifer haben sich Zugang zu den dezentralen IT-Systemen der Hochschule verschafft und sich dann kontinuierlich vorgearbeitet. Erst manuell über das Netzwerk, dann bis in die zentrale IT. Dort drangen sie in das Active Directory vor, wo sämtliche Zugriffsrechte in einem Windows-System verwaltet werden. Sie machten sich selbst zu Administratoren, also zu den Verwaltern des Systems. Mit diesen Rechten wurde dann begonnen, die Daten der Universität zu verschlüsseln.
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