The .xls extension belongs to an older version of Microsoft Excel that supports —automated scripts that can run malicious code the moment you open the file.
: Use a reputable antivirus program to find and remove the infection. company-list.xls
: Modern, safer Excel files use .xlsx , which does not support macros. Be extremely wary of .xls or .xlsm files from unknown sources. safer Excel files use .xlsx
The Danger of "company-list.xls": Why You Should Never Open It company-list.xls
: Use a different, uninfected device to update passwords for your email and financial accounts.
: Immediately turn off your Wi-Fi or unplug your Ethernet cable to stop the malware from communicating with the attacker.