As of 2024, I don't have real-time data, but I can give you an overview of the types of computer viruses that are currently considered highly dangerous based on recent trends and research.
1. **Ransomware**: This type of malware continues to be extremely dangerous. Modern ransomware can encrypt not only personal files but also system files and backups, making recovery difficult. Examples include variants like **LockBit** and **BlackCat (ALPHV)**. These ransomware strains often use advanced evasion techniques and can cause significant financial and operational damage.
2. **Advanced Persistent Threats (APTs)**: APTs are sophisticated and targeted attacks carried out by well-resourced threat actors, often nation-states. They typically aim for long-term infiltration rather than immediate damage. Examples include groups like **APT29** (Cozy Bear) and **APT41**, which are known for their complex and stealthy attack methods.
3. **Fileless Malware**: This type of malware operates in memory rather than installing files on disk, making it harder to detect and remove. It often leverages legitimate system tools to execute malicious actions. Examples include various **PowerShell-based** attacks and **Living off the Land** (LotL) techniques.
4. **Supply Chain Attacks**: These attacks target vulnerabilities in the software supply chain to compromise software before it reaches the end user. Notable examples are the **SolarWinds attack** and the **Kaseya VSA** attack. Such attacks can have widespread impacts since they target software updates and trusted sources.
5. **Zero-Day Exploits**: These are attacks that exploit previously unknown vulnerabilities in software or hardware. They are dangerous because there is no immediate fix or patch available. High-profile zero-day exploits can cause extensive damage before they are mitigated.
Staying informed about these threats and maintaining robust cybersecurity practices is essential for protecting systems from evolving threats.