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AI evaluation startup Braintrust confirms breach, tells every customer to rotate sensitive keys

AI evaluation startup Braintrust has urged customers to revoke and replace their API keys after an earlier breach of customer secrets.

According to an email sent to customers Monday and seen by TechCrunch, the startup confirmed “unauthorized access” in one of its Amazon Web Services (AWS) cloud accounts, which contained API keys used by customers for accessing cloud-based AI models.

“We’ve communicated with one impacted customer and to date have not found evidence of broader exposure,” read the email.

The email asked “every customer to rotate” any of the API keys that they store with Braintrust.

Braintrust disclosed the security incident on its website on Tuesday. “The incident has been contained, and in the meantime, we’ve locked down the compromised account, audited and restricted access across related systems, and rotated internal secrets.” 

The company said the cause of the breach is under investigation.

Braintrust spokesperson Martin Bergman told TechCrunch that the company sent the email to customers “out of an abundance of caution” and that it “confirmed a security incident, but there is no evidence of a breach at this time.”

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Braintrust provides a platform designed for companies to monitor AI models and products. Founder and CEO Ankur Goyal previously told TechCrunch that Braintrust is like an “operating system for engineers building AI software.” The startup raised $80 million in a Series B funding round in February, which valued the company at $800 million.

Jaime Blasco, the co-founder of cybersecurity startup Nudge Security who received a breach email alert from Braintrust, told TechCrunch that the incident could have “downstream implications for affected customers,” like AI companies that rely on Braintrust.

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Do you have more information about this breach? Or other data breaches? From a non-work device, you can contact Lorenzo Franceschi-Bicchierai securely on Signal at +1 917 257 1382, or via Telegram and Keybase @lorenzofb, or email.

Hackers frequently target corporate accounts on cloud services or third-party platforms as an effective way of stealing secrets, like API keys. Once hackers get their hands on API keys, they can log into the company or customers’ systems appearing as if they are legitimate users, without needing to break into the target company’s systems. 

CircleCI, a company that provides development products for software engineers, was hit with a similar cloud data breach in 2023, and similarly asked its customers to rotate “any and all secrets” they stored with the company.

More recently, an EU cybersecurity agency said hackers were able to steal 92 gigabytes of data from a compromised AWS account used by the European Commission. The breach affected 29 other EU entities and the data of dozens of internal European Commission clients.

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The fax machine is the bottleneck in US healthcare, and VCs are starting to notice

Like many AI companies automating work that humans currently do, Basata will eventually face a harder question about where the line is between augmenting workers and displacing them. For now, the founders say the administrative staff they work with aren’t worried about that; they’re more worried about drowning.
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US defense contractor who sold hacking tools to Russian broker ordered to pay $10M to former employers

Peter Williams, a veteran cybersecurity executive who was the head of the hacking and surveillance tech division of U.S. defense contractor L3Harris, has been ordered to pay $10 million to his former employer. Williams was the central figure in one of the worst leaks of advanced hacking tools in the history of the United States and its closest allies.

On Wednesday, a judge ordered Williams to pay that amount in restitution on top of the $1.3 million he had already been ordered to pay to L3Harris. Williams, a 39-year-old Australian citizen who previously worked in one of Australia’s intelligence agencies, was until last year the general manager of Trenchant. Born out of the acquisition of two sister startups, Trenchant is L3Harris’ division that develops advanced spyware and hacking tools and sells them to the U.S. government and its allies in the Five Eyes intelligence alliance, a coalition of five English-speaking nations that share classified intelligence with one another. In addition to the U.S., the alliance includes Australia, Canada, New Zealand, and the United Kingdom.

Veteran cybersecurity reporter Kim Zetter first reported the new order to pay restitution in her newsletter. 

Williams’ lawyers did not respond to a request for comment.

Last year, Williams was arrested and accused of stealing seven unspecified trade secrets — almost certainly cyber exploits, which is code that hijacks software vulnerabilities, and surveillance technology — from Trenchant and then selling them to Operation Zero. The Russian firm acts as a broker, buying and selling hacking tools, and it says it works exclusively with the Russian government and local companies.

Williams pleaded guilty and was sentenced to more than seven years in prison. 

Williams made $1.3 million selling the trade secrets, which he used to buy luxury watches, a house near Washington, D.C., and family vacations. Trenchant told prosecutors that it suffered losses of up to $35 million due to Williams’ theft. 

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U.S. prosecutors said Williams “betrayed” the United States and its allies by giving Operation Zero, which the U.S. government calls “one of the world’s most nefarious exploit brokers,” tools that could have been used to hack “millions of computers and devices around the world.” 

As TechCrunch previously reported, Williams took advantage of his privileged “full access” to Trenchant’s internal network to siphon the tools out of the company’s offices. After Williams sold the hacking tools to Operation Zero, some of them ended up being used by Russian government spies in Ukraine, and later Chinese cybercriminals, according to former L3Harris employees who recognized the stolen code in cybersecurity research that Google published after investigating the cyberattacks in which those tools were deployed.

Williams also tried to frame one of his employees for the theft.

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Poland says hackers breached water treatment plants, and the US is facing the same threat

Poland’s intelligence service said it detected attacks on five water treatment plants where hackers could have taken control of the industrial equipment inside, including, in the worst case, tampering with the safety of the water supply.

The story is relevant beyond Poland’s borders: U.S. water infrastructure has faced similar threats in recent years. In 2021, a hacker briefly gained access to a water treatment plant in Oldsmar, Florida and attempted to increase the level of sodium hydroxide — a caustic chemical — to dangerous levels. The FBI and the U.S. Cybersecurity and Infrastructure Security Agency have since warned that water utilities remain a soft target for foreign hackers.

On Friday, Poland’s Internal Security Agency, the country’s top intelligence agency, published a report covering the last two years of the agency’s operations and threats the country faced. The report said Polish intelligence thwarted multiple acts of sabotage from Russian government spies and hackers, who targeted military facilities, critical infrastructure (essential systems such as power grids, water supplies, and transportation networks), as well as civilian targets. These attacks, according to the report, may have resulted in fatalities.  

“The most serious challenge remains the sabotage activity against Poland, inspired and organized by Russian intelligence services. This threat was (and is) real and immediate. It requires full mobilization,” read the report.

The report did not specify whether the hackers behind the attacks on the water treatment facilities were Russian government spies. But Poland has recently been the target of several attempts by Russian government hackers to attack its infrastructure, including a failed attempt to bring down the country’s energy grid. That breach was later attributed to poor security controls at the targeted facilities.

Poland’s experience is part of a growing global pattern of attacks on water and energy infrastructure. As recently as last month, a joint advisory from the Cybersecurity and Infrastructure Security Agency, the FBI, the NSA, and several other federal agencies warned that Iranian-backed hackers are actively targeting programmable logic controllers — the industrial computers that run water and energy facilities — at U.S. utilities. The same Iranian hacking group, CyberAv3ngers, previously broke into digital control panels at multiple U.S. water treatment plants in Pennsylvania in 2023, in attacks that federal agencies linked to escalating hostilities in the Middle East.

In other words, the attacks against Poland are not unique, they follow a strategy that the Russian government is applying both in war zones such as Ukraine, as well as against Western countries that it sees as longstanding enemies. The plan, according to Polish intelligence, is to destabilize and weaken the West, and cyberattacks and cyberespionage are just tools in a larger toolkit for Putin’s regime.

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