A phishing campaign delivering a new strain of malware, MostereRAT, has been uncovered by cybersecurity researchers. The Remote Access Trojan (RAT) targets Microsoft Windows systems and gives attackers complete control over compromised machines. According to FortiGuard Labs, which discovered the threat, what sets this campaign apart is its layered use of advanced evasion techniques. The malware is written in Easy Programming Language (EPL), a Chinese-based coding language rarely used in cyberattacks, and relies on multiple stages to hide malicious behavior. It can disable security tools, block antivirus traffic and establish secure communications with its command-and-control (C2) server using mutual TLS (mTLS). Attack Chain and Delivery The campaign begins with phishing emails that appear…