Authorities in Ukraine and Russia have reported cyberattacks on their emergency alert apps. In Ukraine, residents received false messages about high nuclear radiation danger in Kyiv. Late Sunday, Ukraine’s air raid alert channel said unauthorized parties interfered with the app, which was temporarily suspended. The app was restored overnight. False alerts also included claims of a chemical threat and public disturbances in Kyiv. Russian officials said hackers sent fake alerts through Russia’s Emergency Ministry app, but the wider alert system remains functional.

U.S.-based blockchain intelligence firm TRM says a North Korean hacking unit was likely behind a massive theft incident at Binance. The world’s biggest cryptocurrency exchange reported Thursday that approximately $6.3 billion was impacted in an apparent hack. The company has worked with blockchain partners to freeze affected assets, with roughly $3 billion frozen. TRM attributes the attack to TraderTraitor, North Korea’s elite hacking unit. The hack moved about $6.36 billion out of Binance wallets on 10 blockchains, it says, making it the largest cryptocurrency theft on record. Another blockchain analysis firm, Chainalysis, also believes the Binance hack was likely done by TraderTraitor.

Madison Square Garden says an email that led employees to believe they were selecting a Knicks championship ring but instead was a phishing attempt was an “unfortunate mistake.” The company added Friday that more than 275 players and employees will still be getting rings as planned. Knicks players received the rings they earned by winning the NBA championship on Tuesday night. On Thursday, The Athletic reported that in September, MSG employees received an email reading: “Congratulations, your Employee Championship Ring is here.” Those who clicked on the link at the bottom of the email were forced to attend a mandatory cybersecurity class.

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FILE - An FBI seal is displayed on a podium before a news conference at the field office in Portland, Ore., Jan. 16, 2025. (AP Photo/Jenny Kane, File)

A cyberattack targeting refrigeration systems has affected about 700 supermarkets across France, the country’s finance minister said Tuesday. Finance Minister Roland Lescure told Parliament that the attack posed no risk for food supplies in France but warned that it was a wake-up call for everyone. The Paris prosecutor’s office said Tuesday it had opened an investigation into the incident.

The FBI has arrested an accused co-conspirator of the hacking group ShinyHunters. The group claimed last month that it breached the FBI’s jobs portal, obtaining sensitive data on nearly all employees. Director Kash Patel said Friday the breach occurred on a platform managed by a third-party vendor. The FBI continues its global investigation into the breach. ShinyHunters claimed responsibility, stating the hack was in response to an FBI advisory labeling them as a cybercriminal group. Experts warn the breach has alarming national security implications, potentially exposing agents and their families to extortion and harassment.

The FBI has seized scanning and phishing tools used by a group of hackers that officials say is associated with the Chinese government and that is responsible for disruptive cyber operations in the United States and abroad, including against the power industry, academia and critical infrastructure. The seizure of the tools, announced Wednesday by the FBI and Justice Department, represents the latest law enforcement effort in recent years to go after a broad-based hacking campaign known to the private sector as Flax Typhoon. The tools at issue, called “Microscan” and “FishHub,” were used by the hackers to scan, phish and hack targets that included U.S. and foreign critical infrastructure.

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FILE - An FBI seal is displayed on a podium before a news conference at the field office in Portland, Ore., Jan. 16, 2025. (AP Photo/Jenny Kane, File)