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Cyberattack is an intentional attempt to compromise computer systems, networks, or digital devices by exploiting vulnerabilities or using malicious software. Common techniques include malware deployment, phishing to steal credentials, ransomware to encrypt data for extortion, and denial-of-service attacks that disrupt availability. These actions aim to gain unauthorized access, manipulate data, or cause operational disruption.

For security professionals, cyberattacks represent critical risks requiring proactive defense measures such as patching known vulnerabilities, monitoring network traffic for anomalies, and enforcing strong authentication. Understanding attacker methods helps prioritize defenses on exposed systems and sensitive data. Effective detection and containment depend on timely threat intelligence and coordinated response to limit damage and restore normal operations.

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Anthropic on Wednesday revealed that it disrupted a sophisticated operation that weaponized its artificial intelligence (AI)-powered chatbot Claude to conduct large-scale theft and extortion of personal data in July 2025