Security researchers Dylan Katz and Victor Gevers confirmed other 26,000 MongoDB servers were hit in a new wave of ransom attacks. Hackers targeted other DBMS, such as ElasticSearch, Hadoop, Cassandra, and CouchDB. The attacks were discovered by the Co-founder of the GDI Foundation who warned of poor security for MongoDB installations in the wild. The experts are now investigating the cause of the success of the attacks. The number of compromised databases in decreased respect the first wave of attacks.”]
Source: http://securityaffairs.co/wordpress/62717/cyber-crime/mongodb-ransom-attacks.html