The malware infection begins with a user receiving a malicious email that prompts them to download a ZIP archive, which contains a JavaScript file named "Update" followed by a random 4-digit number (e.g., Update1234.js). Upon execution, the JavaScript file likely extracts and runs additional malicious payloads, which may include further scripts or executables designed to compromise the user's system and establish a backdoor for remote access. The ZIP archive may have various numerical suffixes, indicating multiple variants of the malware, which can help evade detection by security software and increase the chances of successful infection across different systems.
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