: If it is located in folders like C:\Windows , C:\Users\[User]\AppData , or Temp , it is highly suspicious.

If you find a file named test123.exe on your system and you did not create it for testing purposes, it may be a :

: Used as a test virtual device name ( -avd test123 ) when troubleshooting Windows-based Android emulators. ⚠️ Security Warning

: Use a reputable scanner like Malwarebytes or upload the file to VirusTotal to check its signature against multiple antivirus engines.

: Often found in sandbox environments (like Any.Run or Hybrid Analysis) where security analysts upload files with generic names to test for malicious behavior without revealing the original filename.

Where did you ? (e.g., a specific folder or a website) Are you developing software or looking for security advice ? Did you receive any error messages related to it? Accessing an executable using VI server - NI Community

If you'd like more specific information, please let me know:

: Mentioned in technical guides for Cisco Secure Endpoint to illustrate how path exclusions (e.g., C:\test123 ) prevent the software from scanning specific test directories or executables.