First reported by security researcher Victor Gevers, working with the just launched Project 366 with the GDI Foundation, the attacks – perpetrated by a hacker calling himself Harak1r1 – have been hitting servers since at least Dec. 27 and demanding payouts of 0.2 Bitcoin (about $220).
Gevers detected a ransom demand that replaced all data on an unprotected MongoDB database. In this instance, upon being informed of the incursion by Gevers, the victim firm was able to recover its data, which fortunately had just been backed up.
Other incidents in which Harak1r1's email and Bitcoin address were used have been detected around the world. Bleeping Computer surmised that as all related incidents occurred over the past week, a "mass-scan operation" was being perpetrated by the attacker.
But, although a demand for cash is instituted, Gevers said this is not a case of ransomware as the content on the database is replaced, rather than encrypted. He believed the hacker is using a simple Python script.
Gevers has long been searching for "runnable systems" and reporting them via a responsible disclosure to the firms involved.
He points a finger at legacy MongoDB instances deployed via cloud hosting services for enabling these types of attack. Default configurations leave the database open to external connections via the internet, he said.
"The most open and vulnerable MongoDBs can be found on the AWS platform because this is the most favorite place for organisations who want to work in a devops way," Gevers told Bleeping Computer. "About 78 percent of all these hosts were running known vulnerable versions."
While MongoDB updated its configurations months ago, many users continue to employ older versions.
"Organiations can protect themselves against these types of attacks by enabling authentication on their databases, updating their software and disabling remote access," according to the Tripwire blogThe State of Security
. "They should also regularly check the log files to see if anyone has gained unauthorised access to their servers."
"This is, as far as I know, the first instance of data being stolen via a vulnerability and held in ransom fashion," Casey Ellis, CEO and founder, Bugcrowd, infomed SC Media on Thursday. "This is a logical, interesting and pretty scary pivot in the ransom strategy. There are tons of open, unauthenticated data stores on the internet."