Ransomware is the biggest cyber threat to businesses. First burst onto the scene in 1989, it has evolved significantly over the past few years from widespread attacks to highly targeted ransomware-as-a-service (RaaS) operations affecting organizations of all sizes and sectors. This article takes a look at the evolution of the ransomware ecosystem – what it looks like today, and how it has changed over time.

Jester stealer is an information stealer that has been around since mid-July 2021. Originally sold by the Russian speaking threat group "Jester_Stealer", in several underground forums and Telegram channels, they operate under a Malware-as-a-Service (MaaS) model and present themselves as a group of programmers. Here we delved into the Jester stealer functionalities with a code-level analysis and highlight the possible link between Jester stealer and the new breed of Eternity stealer.