How can I tell if an EXE is malware?

Answered by Douglas Hiatt

As an AI language model, I can provide you with a detailed answer on how to tell if an .exe file is malware or safe. Here are five simple ways to check the safety of an .exe file:

1. Check it with Windows itself:
– Right-click on the .exe file and select “Scan with Windows Defender” or your preferred antivirus software.
– Windows Defender will scan the file for any known malware signatures and alert you if it detects any threats.
– If your antivirus software does not raise any alarms, it is a good indication that the file is safe. However, this is not a foolproof method, as some malware can go undetected.

2. Upload the file to VirusTotal:
– VirusTotal is an online service that analyzes files and URLs for potential malware.
– Go to the VirusTotal website (www.virustotal.com) and upload the .exe file for scanning.
– VirusTotal uses multiple antivirus engines to scan the file, providing a comprehensive analysis.
– Review the results and check if any antivirus engines flag the file as malware. The more engines that flag it, the higher the chance it is malicious.

3. Who is the publisher?
– Right-click on the .exe file and select “Properties.”
– Go to the “Digital Signatures” tab and check the publisher’s name.
– If the publisher is a reputable company or the file is signed by a known developer, it adds credibility to the file’s safety.
– Be cautious if the file is unsigned or the publisher is unknown, as this could be an indicator of potential malware.

4. Run it in Windows Sandbox:
– Windows Sandbox is a lightweight, isolated environment that allows you to run potentially suspicious files without affecting your system.
– Open Windows Sandbox by searching for it in the Start menu.
– Copy the .exe file into the sandbox and run it within the isolated environment.
– If the file behaves suspiciously or tries to make unauthorized changes, it is likely malware. However, remember that this method is not foolproof, and some sophisticated malware can still evade detection.

5. Check the .exe’s network activity for suspicious behavior:
– Use a network monitoring tool like Wireshark or GlassWire to monitor the network activity of the .exe file.
– Look for any unusual or suspicious network connections, such as connections to known malware domains or suspicious IP addresses.
– Be cautious if the .exe file is making frequent and unauthorized network connections, as it could be a sign of malware trying to communicate with remote servers.

It’s important to note that these methods can help in determining the safety of an .exe file, but they are not 100% foolproof. Using multiple methods together can provide a more reliable assessment of the file’s safety. Additionally, keeping your antivirus software up to date and practicing safe browsing habits can help prevent malware infections.