Aliases: Virus.Win32.Nimnul.a (Kaspersky) W32/Ramnit.a (McAfee) W32/Ramnit-A (Sophos) W32.Ramnit.B!inf (Symantec) PE_RAMNIT.DEN (Trend Micro)
Windows Defender Antivirus detects and removes this threat.
This threat downloads and installs other programs, including other malware, onto your PC without your consent.
This threat is a fileless malware. To read more information about fileless malware and how Microsoft security technologies mitigate these evasive threats, read: Now you see me: Exposing fileless malware.
Use the following free Microsoft software to detect and remove this threat:
- Windows Defender for Windows 8.1 and Windows 10, 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 hidden malware.
Use cloud protection
Use cloud protection to help guard against the latest malware threats. It’s turned on by default for Microsoft Security Essentials and Windows Defender for Windows 10.
Go to All settings > Update & security > Windows Defender and make sure that your Cloud-based Protection settings is turned On.
Get more help
If you’re using Windows XP, see our Windows XP end of support page.