Medusa ransomware

Pierluigi Paganini March 24, 2025
Medusa ransomware uses malicious Windows driver ABYSSWORKER to disable security tools

Medusa ransomware uses a malicious Windows driver ABYSSWORKER to disable security tools, making detection and mitigation more difficult. Elastic Security Labs tracked a financially driven MEDUSA ransomware campaign using a HEARTCRYPT-packed loader and a revoked certificate-signed driver, ABYSSWORKER, to disable EDR tools. The attackers used a 64-bit Windows PE driver named smuol.sys, disguised as a […]

Pierluigi Paganini March 13, 2025
Medusa ransomware hit over 300 critical infrastructure organizations until February 2025

The Medusa ransomware operation hit over 300 organizations in critical infrastructure sectors in the United States until February 2025. The FBI, CISA, and MS-ISAC have issued a joint advisory detailing Medusa ransomware tactics, techniques, and indicators of compromise (IOCs) based on FBI investigations as recent as February 2025. This advisory is part of the #StopRansomware […]

Pierluigi Paganini March 07, 2025
Medusa Ransomware targeted over 40 organizations in 2025

Medusa ransomware has claimed nearly 400 victims since January 2023, with attacks increasing by 42% between 2023 and 2024. The Symantec Threat Hunter Team reported that the Medusa ransomware operators have claimed nearly 400 victims since January 2023. Experts observed a 42% increase in attacks carried out by the group between 2023 and 2024. Experts […]

Pierluigi Paganini December 11, 2023
Toyota Financial Services discloses a data breach

Toyota Financial Services (TFS) disclosed a data breach, threat actors had access to sensitive personal and financial data. Toyota Financial Services (TFS) is warning customers it has suffered a data breach that exposed sensitive personal and financial data. “Due to an attack on the systems, unauthorized persons gained access to personal data. Affected customers have now […]

Pierluigi Paganini November 17, 2023
Medusa ransomware gang claims the hack of Toyota Financial Services

Toyota Financial Services discloses unauthorized activity on systems after the Medusa ransomware gang claimed to have hacked the company. Toyota Financial Services confirmed the discovery of unauthorized activity on systems in a limited number of its locations. “Toyota Financial Services Europe & Africa recently identified unauthorised activity on systems in a limited number of its […]

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