Maximus, a US government services contractor, filed an 8-K form with the SEC to reveal a data breach that affected 8 to 11 million people as a result of a MOVEit Transfer data-theft attack. Maximus is a contractor that oversees and runs US government-sponsored initiatives, such as student loan servicing and federal and local healthcare programmes, and covers operations across the US, Canada, Australia, and the United Kingdom, and it has 34,300 workers that generate around $4.25 billion in annual revenue. According to the 8-K form filing, threat actors used a zero-day vulnerability in the MOVEit file transfer application (CVE-2023-34362) to breach and steal data, and the MOVEit environment was instantly isolated from the rest of the business network. However, threat actors with limited time access were able to obtain files containing personal information, such as social security numbers, confidential health data, and other personal data, of at least 8 to 11 million individuals, including those to whom the company expects to deliver notice of the incident. Similarly, the Clop ransomware group added Maximus to its dark web data breach site as part of a large batch of 70 new victims, all of whom were compromised by the MOVEit zero-day exploit. According to Clop Group's claim on their website, they stole 169GB of data during the intrusion on Maximus' MOVEit Transfer service. Fortunately, no information has yet been leaked, implying that the extortion is still ongoing.
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