These checkers are primarily used for unauthorized access to personal accounts, which is illegal in most jurisdictions.
It is highly recommended to with this file for several reasons: darkwebs.ru_E-MAIL_ACCESS_CHECKER.rar
The file appears to be a tool distributed on underground forums for checking if email credentials (email and password combinations) are still valid or accessible. Key Features & Functionality These checkers are primarily used for unauthorized access
Allows for simultaneous checks across multiple accounts to increase speed. Automatically tests large lists of email and password
Automatically tests large lists of email and password pairs against various mail providers to see which ones work.
Some "free" checkers are actually designed to steal the very credentials you are trying to test, sending them back to the tool's developer.
RAR files from untrusted sources, especially those related to "dark web" tools, frequently contain hidden viruses, trojans, or remote access tools (RATs) that can infect your system upon extraction or execution.