The Mandiant M-Trends 2025 Report is a comprehensive analysis of cyber threats observed in 2024, based on over 450,000 hours of incident response engagements. This report outlines key trends, including the rise of infostealer malware and the targeting of unsecured data repositories, which are attributed to inadequate security practices. It documents that exploits were the most common initial infection vector, accounting for 33% of breaches, while the financial sector remained the most targeted industry. The report also discusses the impact of adversary notifications on global median dwell time, which increased to 11 days. Additionally, it details various campaigns and global events initiated by threat actors, providing insights into their tactics, techniques, and procedures. The report emphasizes the importance of understanding these trends to enhance organizational defenses against evolving cyber threats. Mandiant aims to share critical knowledge with the security community to improve threat detection and response strategies.