attack group – CyberSecurityBoard

Attack Groups

Stealth Falcon: Cyber Espionage Group

A threat actor documented by Check Point, associated with the WebDAV hijack technique (CVE-2025-33053) used in this campaign.

attack group Check Point cyber espionage Stealth Falcon

July 20, 2026

Attack Groups

REvil Ransomware Group Overview

REvil, also known as Sodinokibi, is a notorious ransomware-as-a-service group that operated from April 2019 to July 2021, targeting over 1,000 victims…

attack group cybercrime Ransomware REvil

July 17, 2026

Attack Groups

Sodinokibi Ransomware Group Overview

Sodinokibi is the malware variant associated with the REvil ransomware group, used in attacks from April 2019 to July 2021. It is…

attack group malware Ransomware REvil

July 17, 2026

Attack Groups

Medusa Ransomware Group

Medusa ransomware is a threat group that has previously used the custom malicious driver ABYSSWORKER in its attacks.

attack group BYOVD Medusa ransomware Ransomware

June 25, 2026