Threat Intelligence - RH-ISAC Blog

Summary Yes24, a major South Korean ticketing platform and online book retailer, has been heavily impacted by a ransomware attack, causing a four-day service outage and significant disruption to the country’s entertainment industry. The attack, which began on Monday, has forced the postponement or cancellation of numerous K-pop concerts, fan meetings, and musical performances. South…

Summary The cybercriminal group known UNC6040 is conducting sophisticated attacks by socially engineering employees into installing maliciously modified versions of Salesforce’s Data Loader tool, facilitating extensive data theft, according to new intelligence from Google Cloud. Exploiting phone-based social engineering (“vishing”), these attackers pose as IT support to trick victims into granting unauthorized Salesforce app access,…

Summary Sophos Managed Detection and Response (MDR) recently intervened in a targeted cyberattack against an unnamed Managed Service Provider (MSP), where threat actors leveraged vulnerabilities in the SimpleHelp remote monitoring and management (RMM) platform to deploy DragonForce ransomware across multiple endpoints. Attackers exploited vulnerabilities CVE-2024-57727, CVE-2024-57728, and CVE-2024-57726, initially disclosed in January 2025, to achieve remote execution, arbitrary file…

Context EclecticIQ has identified active exploitation of two critical vulnerabilities (CVE-2025-4427 and CVE-2025-4428) in Ivanti Endpoint Manager Mobile (EPMM) version 12.5.0.0 and earlier, allowing for unauthenticated remote code execution. This activity, attributed with high confidence to the China-nexus espionage group UNC5221, began on May 15, 2025, and targets critical sectors globally, including healthcare, telecommunications, and government. The threat actors…

As the summer travel season approaches, travelers worldwide are busy booking their holidays, entrusting the hospitality industry with some of their most sensitive personal and financial information. Unfortunately, this makes the sector a prime target for threat actors looking to exploit and steal this data. In the 2025 Trustwave Risk Radar Report: Hospitality Sector report,…