A new remote access trojan (RAT) named msaRAT has been identified by Cisco Talos, linked to the Chaos ransomware group and built using Rust. It exploits Chrome and Edge browsers to disguise its traffic and evade detection. MsaRAT operates through a headless browser process, enabling remote code execution and facilitating ransomware deployment, data theft, and other malicious activities. It is typically installed via phishing emails or malicious files, making it resistant to standard browser patches. Cisco Talos recommends specific SNORT rules and a ClamAV signature for detection. Indicators of Compromise (IoC) include traffic to the IP address 172.86.126.18 and the domain is-01-ast.ols-img-12.workers.dev. The malware primarily targets large organizations, but individual users may also be at risk.