: It is associated with Tycoon 2FA , a "phishing-as-a-service" platform designed to bypass multi-factor authentication (MFA) for Microsoft 365 and Gmail accounts.
: Security reports from ANY.RUN list various hashes (MD5, SHA256) for this file as of April 2026, marking it as a critical threat to organizations. Other Technical Uses 31.zip
Technical manuals, such as the HIOS RBIS User Manual , reference "Figure 31: ZIP Code Field" in their documentation of software interfaces. : It is associated with Tycoon 2FA ,
: A download for an Adobe script tutorial is hosted as adobe-script-tutorial-31.zip on Mars Premedia . Regulatory & Technical Specs : 31.zip
In non-malicious contexts, "31.zip" often serves as a shorthand or version-specific filename: