.rar files are commonly used to bypass basic email scanners or web filters that might flag an unzipped .exe or script.
Malicious archives often contain hidden scripts or executables designed to run the moment you extract them. Archivo de Descarga ProKit v45.rar
"ProKit" is a generic name used by various legitimate tools (like Qiagen's ProKit for lab work), but also frequently used by hackers to hide malicious payloads in compressed .rar archives. Archivo de Descarga ProKit v45.rar
If this came from a colleague, contact them via a different channel (like a phone call or chat) to confirm they actually sent it. Archivo de Descarga ProKit v45.rar