“this person might be charging money in cryptocurrency according to the sensitiveness of the database.” explained Jain.
The expert discovered 12,564 unprotected MongoDB DBs that were wiped by an attacker tracked as Unistellar, he searched the text “hacked_by_unistellar” that the attacker left in the message.
Making the same search on Shodan experts at BleepingComputer found a smaller number, 7,656 databases, while doing the same search I found 8.133 compromised installs exposed online. It is likely the attacker has automated its attacks chain due to the lange number of MongoDB databases deleted by Unistellar.
Jain first discovered the attacks on April 24, the note left by the Unistellar attacker reads “Restore ? Contact : firstname.lastname@example.org
The attacker used two email addresses in these attacks, email@example.com or firstname.lastname@example.org.
According to Jain, Unistellar creates restore points to restore the databases after the victims have paid the ransom.
Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines.
Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.