ISC Stormcast For Friday, August 28th, 2026 https://isc.sans.edu/podcastdetail/10072, (Fri, Aug 28th)
The ISC Stormcast highlighted a significant increase in malicious email campaigns targeting financial institutions with sophisticated spear-phishing attacks. The campaigns leveraged compromised credentials and utilized a novel technique to bypass email security filters, resulting in potential data breaches and financial losses. The threat landscape remains volatile, with a strong emphasis on exploiting existing vulnerabilities and leveraging stolen credentials.
The SANS Internet Storm Center’s latest Stormcast for August 28th, 2026 focused on a concerning trend of increasingly targeted and successful phishing attacks against the financial sector. The core issue revolves around a new wave of spear-phishing campaigns that are utilizing compromised credentials obtained through various means, including brute-force attacks and credential stuffing. Attackers are now bypassing traditional email security filters by crafting highly personalized emails that mimic legitimate communications from internal systems and executives.
Specifically, the ISC noted a rise in campaigns impersonating internal IT support requests, leveraging stolen credentials to gain access to sensitive systems and data. The attackers are utilizing a novel technique involving the use of a custom-built script that modifies email headers to evade detection by common spam filters. This script effectively tricks email gateways into believing the emails are legitimate, allowing them to reach the intended recipients.
The ISC also discussed the ongoing impact of the ‘ShadowRAT’ malware family, which continues to be utilized in targeted attacks against organizations in various sectors. Furthermore, the threat landscape remains heavily influenced by the continued exploitation of vulnerabilities in widely used software, including several versions of WordPress and Joomla.
The ISC stressed the importance of robust employee training programs focused on identifying and reporting suspicious emails, as well as implementing multi-factor authentication across all critical systems. They also recommended regularly reviewing and updating security policies to address emerging threats and vulnerabilities.