Use tools like binwalk or strings to look for hidden files, suspicious URLs, or hardcoded credentials within the archive.
According to a recent automated malware analysis report from ANY.RUN , a file named CNI.rar was observed interacting with system processes like WinRAR.exe to perform write operations in a controlled environment. CNI.rar
Providing the source of the file could help narrow down the specific "write-up" you need. Use tools like binwalk or strings to look
If the archive contains an executable (e.g., .exe or .vbs ), run it in a isolated sandbox to monitor network traffic and registry changes. .exe or .vbs )