Ransomware attacks continue to be a primary threat, with groups often using ransomware-as-a-service (RaaS) models where developers sell their malware to affiliates. As of 2024–2026, many attacks rely on stolen credentials to gain initial access, followed by data encryption and extortion.
Here are some of the most specific and popular ransomware types:
LockBit: Known as one of the most prolific ransomware groups in recent years, LockBit operates through affiliates who infiltrate networks and exfiltrate data. Despite major law enforcement actions, the group has continued to be highly active, targeting large payouts.
RansomHub: A prominent new group in 2024, RansomHub quickly gained notoriety for targeting organizations for high-dollar ransoms, utilizing a wide array of techniques for initial network access.
Ryuk: A notorious, high-cost ransomware often used in targeted attacks against enterprises. It frequently spreads via phishing emails that carry TrickBot infections, with a reputation for targeting sensitive industries.
Conti: A major RaaS group that historically targeted high-revenue organizations. Although internal logs were leaked following internal disputes, Conti-related methodologies remain influential in modern threat landscapes.
REvil (Sodinokibi): Operated as a RaaS provider, REvil gained fame for its Ransomware-as-a-Service model, where they leased malware to external parties to attack networks, leading to numerous high-profile, global incidents.
WannaCry: A widely known ransomware that caused massive disruption by spreading as a worm, utilizing the EternalBlue vulnerability to infect systems rapidly. It remains a benchmark for worm-type ransomware.
NotPetya/Petya: A 2017 incident that was used to conduct a widespread cyberattack, particularly focusing on crippling infrastructure and business networks.
Locky: A common ransomware family that originally targeted large numbers of users through aggressive spam campaigns, designed to encrypt files and demand payment.
Bad Rabbit: Known as a form of ransomware that often spreads through social engineering, targeting files for encryption and demanding a ransom.
These groups and variants commonly target sectors like healthcare, education, and critical infrastructure.
If you are concerned about a specific industry, I can narrow down which threats are most common there.
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