Capital One Attacker Exploited Misconfigured AWS Databases

After bragging in underground forums, the woman who stole 100 million credit applications from Capital One has been found guilty.

The 36-year-old Seattle tech worker behind the infamous 2019 Capital One data breach has been convicted on seven charges related to the data theft — which are punishable by up to 20 years in jail.
In the incident, Paige Thompson, who operated under the hacker handle erratic, made off with more than 100 million credit applications that were held in a misconfigured Amazon Web Services storage bucket in the cloud. She was arrested shortly thereafter, after the banking giant traced the malicious activity back to her and alerted the FBI.
Ms. Thompson used her hacking skills to steal the personal information of more than 100 million people, and hijacked computer servers to mine cryptocurrency, said US Attorney Nick Brown,
in a statement
. Far from being an ethical hacker trying to help companies with their computer security, she exploited mistakes to steal valuable data and sought to enrich herself.
Prosecutors noted that Thompson specifically used a scanner to look for AWS misconfigurations, in which databases are left open to the Internet without authentication required for access. In all, she managed to infiltrate the databases of 30 entities, including Capital One — stealing data and in some cases planting cryptocurrency miners.
According to a Department of Justice statement, Thompson spent hundreds of hours advancing her scheme, and bragged about her illegal conduct to others via text or online forums.
After a seven-day trial and 10 hours of deliberation, a jury in US District Court in Seattle found Thompson guilty of wire fraud, five counts of unauthorized access to a protected computer, and damaging a protected computer. The jury found her not guilty of access-device fraud and aggravated identity theft.
Thompson is scheduled for sentencing by US District Judge Robert S. Lasnik on Sept. 15.
She wanted data, she wanted money, and she wanted to brag, Assistant US Attorney Andrew Friedman said in closing arguments.
We are pleased with the outcome of the trial and remain thankful for the tireless work of the US Attorneys Office in Seattle and the FBIs Seattle Field Office in prosecuting this important case, Capital One said in a media statement.
While Thompson was bent on malicious activity, the incident also brought cloud-security responsibility and the issue of misconfigurations to the fore. Capital One was found to be negligent for leaving sensitive financial data open to the public,
resulting in an $80 million fine
. It also
settled customer lawsuits for $190 million
— not an inexpensive result.
The Capital One breach really put cloud security at the forefront of many enterprises, says John Bambenek, principal threat hunter at Netenrich. Prior to that, there was a misconception that the cloud companies would handle security and that default settings were secure enough. The reality is, the shared-security model requires users to make sure that their cloud environments are secure and that data does not accidentally leak.
In its recent report on cloud misconfigurations, security firm Rapid7 noted that breaches stemming from cloud misconfigurations continue to happen with distressing frequency.
First and foremost, you should now be keenly aware that there are individuals actively seeking out cloud service misconfigurations on a daily basis, researchers warned in the report. Given the right tooling, its almost trivial for any moderately clever person to hunt for these cracks in the cloud at scale, and they dont even need to be targeting your organization specifically to come across that unintended misconfiguration which ends up exposing sensitive data in your care.
As an example, earlier this month researchers from Secureworks Counter Threat Unit (CTU) found that cyberattackers
are targeting misconfigured Elasticsearch cloud buckets
for extortion purposes. After finding data exposed on the public Internet, the attackers then steal the wide-open data and replace it with a ransom note. At the time, nearly 1,200 instances had been affected.
Thus, enterprises should dedicate resources to cloud security, including planning for safe and resilient configurations and automated processes to monitor for mistakes and oversights, researchers noted.
Bambenek says theres evidence that things are getting better.
Its taken a few years, however we are making real strides in not only having default-secure settings, but for security tools to start detecting misconfigurations and malicious behavior in cloud environments, he tells Dark Reading.

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Capital One Attacker Exploited Misconfigured AWS Databases