A ransomware group is an organized collective of cybercriminals specializing in launching ransomware attacks. These groups infiltrate computer systems, encrypt data, and demand payment - usually in cryptocurrency - in exchange for restoring access. If victims refuse to pay, the group may threaten to leak or sell stolen data. Ransomware groups often operate internationally, using sophisticated tools and tactics to evade law enforcement. Their activities pose significant risks to businesses, governments, and individuals worldwide.