Peeling back Banana RAT.

This week, we are joined by Tom Kellermann, Trend Micro's VP of AI Security and Threat Research, discussing their work on "Inside SHADOW-WATER-063’s Banana RAT: From Build Server to Banking Fraud." Researchers from Trend Micro's MDR team uncovered the full operation behind Banana RAT, a sophisticated banking trojan they track as SHADOW-WATER-063, by analyzing both attacker infrastructure and infected victim systems.

The malware uses fileless PowerShell execution, layered obfuscation, and remote-control capabilities to steal credentials, manipulate banking sessions, intercept Pix QR code payments, and facilitate financial fraud targeting Brazilian banks. The campaign appears to be operated by a Brazilian Portuguese-speaking cybercriminal group with ties to the broader Tetrade banking malware ecosystem and may be evolving toward a malware-as-a-service model.