: Educate staff on the risks of opening unexpected archives, even if they appear to come from known internal contacts (who may themselves be compromised).
: Connections to unusual IP addresses over non-standard ports (e.g., 4545 or 5555), often signaling a Command and Control (C2) callback. 54151.rar
: If your business doesn't require .rar files, block them at the email gateway. : Educate staff on the risks of opening