Some customers of Santander may have had their data stolen following a supply-chain attack targeting one of the bank’s third-party providers.
The company confirmed the news in a breach notification letter to customers, noting “We recently became aware of an unauthorized access to a Santander database hosted by a third-party provider."
“We immediately implemented measures to contain the incident, including blocking the compromised access to the database and establishing additional fraud prevention controls to protect affected customers.”
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Subsequent investigation into the incident uncovered that the victims are customers of Santander Chile, Spain, and Uruguay. Unfortunately, localized Twitter accounts (Spain and Chile) have no warnings or no information about the breaches. The Chile website, however, does display a warning.
Some of the stolen data belongs to some current and former employees. “Customer data in all other Santander markets and businesses are not affected,” the company confirmed.
Santander has a presence in many countries around the world, the UK, the US, and Mexico, included, with more than 140 million customers overall.
The company did not explain who the threat actors were, what they were trying to achieve, or what type of data they stole. It did say that transactional data, user credentials, and any other information that would allow financial transactions, were not found in the compromised database, and are thus secure.
“The bank's operations and systems are not affected, so customers can continue to transact securely,” it concluded.
The breach notification letter concludes with a mandatory apology for inconvenience caused, and a confirmation that affected individuals would be notified in due time. “We have also notified regulators and law enforcement and will continue to work closely with them,” Santander said.
Via BleepingComputer
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