The National Institute of Standards and Technology (NIST) has released a practice guide covering methods aimed at helping major industries implement the Internet security protocol TLS 1.3, as well as conduct network monitoring and auditing safely, securely, and effectively. Companies in finance, healthcare, and other major industries must follow best practices for monitoring incoming data for cyberattacks. TLS 1.3 provides advanced protection but complicates the performance of required data audits.

Europcar, a global car rental company, has denied claims of a data breach, arguing that the Europcar data posted online by threat actors was generated using ChatGPT, the Artificial Intelligence (AI)-powered chatbot. An advertisement on a popular data leak forum claims that attackers are selling the personal information of 50 million Europcar customers. The authors say they accessed usernames, passwords, home addresses, passport numbers, and other sensitive information. However, the company says this advertisement is false, and the sample data is likely ChatGPT-generated.

According to Guardio Labs researchers, the phishing ecosystem has been made highly accessible due to Telegram's emergence as a hub for cybercrime, allowing threat actors to launch massive attacks inexpensively. The messaging app has evolved into a place where cybercriminals of different skill levels could exchange illicit tools and insights, resulting in an effective supply chain of tools and victim data. They are sharing free samples, tutorials, kits, and other components that could help build a malware campaign.

A zero-day vulnerability, discovered by a security researcher named Florian and reported to Microsoft, has the potential to crash the Windows Event Log service on all supported (and some legacy) versions of Windows. The exploitation of this vulnerability by a malicious actor could cause significant problems for enterprise defenders. The vulnerability has not yet been patched, but in the meantime, the researcher has received permission from the company to publish a Proof-of-Concept (PoC) exploit.

An attack on the medical transcription company Perry Johnson & Associates (PJ&A) is now considered the largest US health sector data breach that occurred in 2023. PJ&A provides transcription services to medical facilities in the US, so it holds sensitive information about millions of Americans. Last year, hackers breached the company between March 27 and May 2, later stealing personal data from its systems in April. PJ&A disclosed that the breach affected more than 8.95 million people.