From trendmicro.com

Introduction

On August 4, 2023, the HHS’ Health Sector Cybersecurity Coordination Center (HC3) released a security alert about a relatively new ransomware called Rhysida (detected as Ransom.PS1.RHYSIDA.SM), which has been active since May 2023. In this blog entry, we will provide details on Rhysida, including its targets and what we know about its infection chain.

Who is behind the Rhysida ransomware?

Not much is currently known about the threat actors behind Rhysida in terms of origin or affiliations. According to the HC3 alert, Rhysida poses itself as a “cybersecurity team” that offers to assist victims in finding security weaknesses within their networks and system. In fact, the group’s first appearance involved the use of a victim chat support portal.