Blog - RH-ISAC

Executive Summary Since November 2024, IBM X-Force has been tracking QuirkyLoader, a new malware loader actively used to deliver a variety of well-known payloads, including keyloggers and Remote Access Trojans (RATs). This multi-stage infection begins with a malicious email attachment that exploits dynamic-link library (DLL) side-loading to execute a hidden malicious DLL. The loader, consistently written…

Executive Summary Proofpoint discovered a widespread phishing campaign leveraging fake Microsoft OAuth applications to bypass multifactor authentication (MFA) and harvest Microsoft 365 credentials. The attackers impersonated reputable brands like RingCentral, Adobe, SharePoint, and DocuSign, by luring victims into approving minimal‑privilege access. Even if MFA was declined, victims were redirected through CAPTCHA and a phishing page using…

As the digital threat landscape continues to evolve, so too does the role of the CISO. The newly released 2025 RH-ISAC CISO Benchmark Report, developed in partnership with Accenture, offers a compelling snapshot of how cybersecurity leaders across retail and hospitality are adapting to new challenges, investing in resilience, and aligning security with business strategy….

Executive Summary Microsoft has identified widespread, active exploitation of a new SharePoint remote code execution (RCE) vulnerability chain, designated ToolShell, tracked as CVE-2025-53770. This zero-day exploit, demonstrated publicly on X just days prior, allows unauthenticated attackers to compromise on-premises SharePoint servers globally, extracting cryptographic secrets and enabling full remote control. Microsoft, and CISA, has confirmed the active exploitation and…

Executive Summary Recent major cyber incidents several South Korean entities highlight a critical concern within network-separated, or air-gapped, environments. Despite the inherent security assumptions often associated with these isolated setups, these breaches demonstrate a dangerous decline in caution and a false sense of security. This has led to successful compromises, highlighting that even seemingly air-gapped…