Osiris ransomware emerges, leveraging BYOVD technique to kill security tools
Researchers identified a new Osiris ransomware used in a November 2025 attack, abusing the POORTRY driver via BYOVD to disable security tools. Symantec and Carbon Black researchers uncovered a new ransomware strain named Osiris, used in a November 2025 attack…
Osiris ransomware emerges, leveraging BYOVD technique to kill security tools Symantec and Carbon Black researchers uncovered a new ransomware strain named Osiris, used in a November 2025 attack agai… [+3305 chars]