Toyota Financial Services (TFS) says personal details, including bank account information, were compromised in last month’s ransomware attack claimed by the Medusa ransomware gang.

The European branch of the Japanese automaker’s vehicle financing and leasing subsidiary sent a notice, to affected individuals informing them of the exposure.

On December 5th, TFS has also announced the breach on its website and that “unauthorized persons had gained access to personal data.”

“As announced on November 16th, Toyota Financial Services Europe & Africa has detected unauthorized activity on systems at a limited number of locations, including Toyota Kreditbank GmbH in Germany,” the post stated, translated from German.

TFS handles auto loans, leases, and other financial services to Toyota customers in every continent.

Toyota Deutschland GmbH is an affiliated company held by Toyota Motor Europe (TME) in Brussels, Belgium and located in Köln (Cologne).

The breach notification letter, also sent in German,
explains that certain TKG files were accessed during the attack.

At this time, TFS can confirm the compromised information of those affected includes first and last names, as well as their residential postal code.

Other contract information that may have been exposed includes “contract amount, possible dunning status, and your IBAN (International Bank Account Number),” the letter stated.

“We regret any inconvenience this may have caused to customers and business partners,” TFS wrote.

“It’s not clear how the attackers initially gained access to Toyota’s systems, but with unauthorized access being detected, this could indicate stolen credentials were involved,” said CEO of My1Login Mike Newman.

Data frequently reveals that phishing and credential theft are two of the most common attack vectors used to deploy ransomware, Newman explained.

Newman said the incident is yet another example of “how criminals hold all the power when it comes to ransomware,” adding that for groups like Medusa, the money-making opportunities are endless.

“It doesn’t matter if the organization pays the ransom demand, attackers always have the upper hand as they can still…