Lumma Stealer is a type of infostealer malware that targets Windows systems. Once installed, it covertly harvests sensitive information such as browser credentials, cookies, autofill data, and cryptocurrency wallet details. Distributed via phishing emails, malicious downloads, or cracked software, Lumma Stealer transmits stolen data to remote servers controlled by cybercriminals. Its modular design allows attackers to update its capabilities, making it adaptable and persistent. The malware poses significant risks to both individuals and organizations, as compromised credentials can lead to further attacks, data breaches, and financial losses. Regular updates, strong passwords, and robust endpoint security are essential defenses.