We're gradually updating threat actor names in our reports to align with the new weather-themed taxonomy. Learn about Microsoft threat actor names
Virus:Win32/Grenam.A
Aliases: Win32/Delf.NRJ worm (ESET) W32/Renamer-K (Sophos) Virus.Win32.Renamer.j (Kaspersky)
Summary
Windows Defender detects and removes this threat.
This virus can infect files with a .exe extension. When these files are run, the virus will run instead.
Use the following free Microsoft software to detect and remove this threat:
- Microsoft Defender Antivirus for Windows 10 and Windows 8.1, or Microsoft Security Essentials for Windows 7 and Windows Vista
- Microsoft Safety Scanner
You should also run a full scan. A full scan might find other hidden malware.
Additional remediation instructions for this threat
This threat might make lasting changes to your PC's settings that won't be restored when it's cleaned. The following links can help change these settings back to what you want:
- Change file associations:
- For Windows 8.1
- For Windows 7
- For Windows Vista
- View hidden and/or system files:
- For Windows 7
- For Windows Vista
Get more help
You can also visit our advanced troubleshooting page or search the Microsoft virus and malware community for more help.
If you’re using Windows XP, see our Windows XP end of support page.