Based on technical analysis of similar samples from late 2019, here is what this file likely contains and how it functions: 1. Likely Malware Family
Upload the file hash (MD5/SHA256) to VirusTotal to see if it has already been flagged by security vendors.
These often use fake "Update" or "Invoice" filenames to trick users into executing a downloader that then pulls more advanced spyware. 2. Common Infection Chain Receiver.Update.15.09.2019 (2).rar
If you are analyzing this file in a sandbox environment, look for these behaviors:
A Remote Access Trojan that allows attackers to take full control of a victim's machine. Based on technical analysis of similar samples from
Adding keys to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run to ensure it starts with the computer.
The .rar extension is used to bypass basic email filters that might block executable files like .exe or .scr . Receiver.Update.15.09.2019 (2).rar
While there is no formal academic "paper" specifically titled after this exact file, the filename is highly characteristic of a malicious archive used in malware campaigns .