From January through May 2026, Mandiant identified a financially motivated data theft extortion campaign executed by the threat cluster UNC3753 (also tracked as “Luna Moth,” “Chatty Spider,” and “Silent Ransom Group”) targeting dozens of organizations across professional, legal, and financial services in the United States.
UNC3753 leverages voice phishing (vishing) and social engineering deception techniques to achieve remote access into corporate environments. Using pretexts such as data migration or invoice related emails, the threat actors initiate phone conversations posing as IT support and convince targets to host screen-sharing sessions and download remote monitoring and management (RMM) utilities.
Read more…
Source: Mandiant
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- Hospitals in London declared critical incident after cyber-attack
June 4, 2024
Major hospitals in London have declared a critical incident after a cyber-attack led to operations being cancelled and emergency patients being diverted elsewhere. It applies to hospitals partnered with Synnovis – a provider of pathology services. King’s College Hospital, Guy’s and St Thomas’ – including the Royal Brompton and the Evelina London Children’s Hospital – and ...
- The impact of legacy vulnerabilities in today’s cybersecurity landscape
June 4, 2024
Of the top five most widely used network attacks against SMBs, the ‘newest’ vulnerability represented were nearly three years old, while the oldest were over a decade old – which is primitive when considering the modern threat environment. The results are a clear reminder for CISOs and cybersecurity leaders that they must assess organizational threats based ...
- Navigating Cyber Risk Through Collaboration
June 3, 2024
The constantly evolving cyber risk landscape presents a formidable challenge to organizations, as businesses transform, scopes and boundaries shift, and bad actors develop new tactics and techniques to exploit vulnerabilities and compromise systems. With the rate of risk velocity increasing faster than the resources of most risk-focused teams, collaboration and working together smarter is one of ...
- Excel File Deploys Cobalt Strike at Ukraine
June 3, 2024
FortiGuard Labs has recently identified a sophisticated cyberattack involving an Excel file embedded with a VBA macro designed to deploy a DLL file. The attacker uses a multi-stage malware strategy to deliver the notorious “Cobalt Strike” payload and establish communication with a command and control (C2) server. This attack employs various evasion techniques to ensure successful ...
- UK: The Princess of Wales’s hospital data breach not referred to police due to suspected ‘decoy’ plan
June 3, 2024
The Princess of Wales’s hospital data breach has not been referred to police as an expert explains that a “decoy” plan could have been in use – meaning her actual medical files were not accessed by the perpetrators. Despite Health Minister Maria Caulfield revealing back in March that the police had been asked to look into ...
- Inside The Box: Malware’s New Playground
June 3, 2024
Over the past few months, we have been monitoring the increasing abuse of BoxedApp products in the wild. BoxedApp products are commercial packers that provide advanced features such as Virtual Storage (Virtual File System, Virtual Registry), Virtual Processes, and a universal instrumentation system (WIN/NT API hooking). Even though BoxedApp has been commercially available for a while, ...