Threats Tagged 'cybercriminal activity'

Lumma Stealer malware has resurged since October 2025, now incorporating adaptive browser fingerprinting to enhance its command-and-control (C&C) operations. It collects detailed system, network, hardware, and browser information via JavaScript payloads and stealthy HTTP communications, enabling it to assess victim environments and evade detection. The malware continues to use process injection and maintains its core C&C communication structure while adding these new evasion and targeting capabilities. This hybrid approach improves operational continuity, targeting precision, and detection avoidance. Although no known exploits are currently reported in the wild, the malware’s stealth and data exfiltration capabilities pose a medium-level threat. European organizations should be aware of this evolving infostealer, especially those with high-value data and browser-based workflows. Mitigation requires advanced endpoint detection, network monitoring for stealthy HTTP traffic, and browser security hardening. Countries with significant digital economies and high adoption of targeted software are at greater risk.

MediumMalwareGermanyFranceNetherlands+4#evasion techniques#browser fingerprinting#lumma stealer