Although the threat actor did not reveal the company, a screenshot shows they claim to identify Zscaler in the shoutbox of the dark web forum. Moreover, some linked the forum post to Zscaler, claiming they were the ones compromised, given that the company is listed on ZoomInfo with $1.8 billion in revenue.

This threat actor gained prominence following the compromise of DC Health Link, which resulted in a congressional hearing when the breach revealed the private information of staff members and members of the US House of Representatives. Several further breaches, involving Acuity, Home Depot, and Weee!, have been attributed to them since then. Additionally, the cybercriminal claimed to have compromised Hewlett Packard Enterprise (HPE) in February. HPE first denied the claim, but then acknowledged that a test environment had been compromised.

Impact

• Exposure of Sensitive Data
• Information Theft

Remediation

• Regularly change passwords for all accounts.
• Use strong, unique passwords for sensitive accounts.
• Implement multi-factor authentication (MFA) on all accounts to add an extra layer of security to login processes.
• Consider the use of phishing-resistant authenticators to further enhance security. These types of authenticators are designed to resist phishing attempts and provide additional protection against social engineering attacks.
• Regularly monitor network activity for any unusual behavior, as this may indicate that a cyberattack is underway.
• Organizations need to stay vigilant and follow best practices for cybersecurity to protect their systems and data from potential threats. This includes regularly updating software and implementing strong access controls and monitoring tools.
• Develop a comprehensive incident response plan to respond effectively in case of a security breach or data leakage.
• Maintain regular backups of critical data and systems to ensure data recovery in case of a security incident.
• Adhere to security best practices, including the principle of least privilege, and ensure that users and applications have only the necessary permissions.
• Establish a robust patch management process to ensure that security patches are evaluated, tested, and applied promptly.
• Conduct security audits and assessments to evaluate the overall security posture of your systems and networks.
• Implement network segmentation to contain and isolate potential threats to limit their impact on critical systems.
• Never trust or open links and attachments received from unknown sources/senders.