Cybercriminal Group UNC5537 Strikes with Major Data Breaches

In recent weeks, the cybercriminal group UNC5537 has made significant waves. This ransomware gang, potentially linked to ShinyHunters or Scattered Spider, stole over 560 million customer records from Ticketmaster. On May 28, they listed this data for sale on their revamped leak site, BreachForums, with a price tag of $500,000. Just two days later, the group claimed to have obtained 30 million account records from Santander Bank in Spain, demanding $2 million for the data. Both companies confirmed the breaches after these announcements.

A June 10 analysis by Mandiant, an incident-response firm now part of Google, revealed that these data leaks, along with at least 163 other breaches, were not due to system vulnerabilities but rather the exploitation of stolen credentials and inadequate multifactor authentication (MFA) controls. According to Mandiant, no evidence indicates that the breaches stemmed from Snowflake’s enterprise environment. Instead, all incidents are traced back to compromised customer credentials.

While implementing MFA could have prevented the data theft from Snowflake’s systems, the companies involved have broader issues beyond this single control. Businesses must ensure visibility into their attack surfaces, promptly disable accounts of former employees and contractors, and minimize entry points for attackers. Chris Morgan, senior cyber threat intelligence analyst at ReliaQuest, emphasizes that attackers often exploit basic security lapses. “Targeting the low-hanging fruit — in this case, insecu

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