Often, malware uses platforms like — Telegram and Discord for data exfiltration. Due to its simplicity and the lack of need for building a server architecture, this exfiltration method has gained significant popularity. However, this very simplicity is also its weakness. In this article we’ll show you how to obtain information related to threat actors’ […]
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CISA continues to respond to active exploitation of internet-accessible operational technology (OT) and industrial control systems (ICS) devices, including those in the Water and Wastewater Systems (WWS) Sector. Exposed and vulnerable OT/ICS systems may allow cyber threat actors to use default credentials, conduct brute force attacks, or use other unsophisticated methods to access these devices and cause harm.
CISA urges OT/ICS operators in critical infrastructure sectors to apply the recommendations listed in Defending OT Operations Against Ongoing Pro-Russia Hacktivist Activity to defend against this activity. To learn more about secure by design principles and practices, visit CISA's Secure by Design webpage. For more information and guidance on protection against the most common and impactful threats, tactics, techniques, and procedures, visit CISA’s Cross-Sector Cybersecurity Performance Goals.
Citrix released security updates to address multiple vulnerabilities in XenServer and Citrix Hypervisor. A cyber threat actor could exploit some of these vulnerabilities to cause a denial of service condition.
CISA encourages users and administrators to review the following and apply necessary updates:
As Hurricane Helene approaches, CISA urges users to remain on alert for potential malicious cyber activity. Fraudulent emails and social media messages—often containing malicious links or attachments—are common after major natural disasters. Exercise caution in handling emails with hurricane-related subject lines, attachments, or hyperlinks. In addition, be wary of social media pleas, texts, or door-to-door solicitations relating to severe weather events.
CISA encourages users to review the following resources to avoid falling victim to malicious cyber activity: