Trojan:Win32/Wacatac.B!ml represents an ongoing and adaptable threat to Windows. It functions primarily as a trojan, acting as a versatile tool for threat actors to steal information, download additional harmful software, or create a backdoor for ransomware. Since its significant rise in activity around 2020, the threat has relied heavily on social engineering for its initial access. Threat actors often bundle Wacatac with cracked software, pirated media, or distribute it through phishing emails disguised as routine business messages. Once a user launches the file, the malware uses packing and encryption to hide its code. 

The core risk of this malware is its deep integration with the Windows device. It modifies registry keys, tampers with Windows files, and can even change Group Policy settings to deactivate security tools and ensure it survives a reboot. Because of its modular build, a single infection can lead to stolen credentials, exfiltrated personal data, or a full network compromise through the installation of remote access tools. This report breaks down the technical workings, specific forensic evidence left behind, and the step-by-step response needed to handle this persistent threat.