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Backdoor:Win32/Kelihos.F
Aliases: BDS/Kelihos.F.50 (Avira) Trojan.Packed.2339 (Dr.Web) Trojan.Win32.FakeAv.lqyd (Kaspersky) Mal/FakeAV-QV (Sophos)
Summary
Windows Defender detects and removes this threat.
This trojan can give a malicious hacker access and control of your PC.
It can be installed by other malware, such as TrojanDownloader:Win32/Waledac.C, or other variants of the Win32/Kelihos family.
The family spreads by sending spam emails that have links to other malware. They can also communicate with other PCs to exchange information about sending spam emails, steal your sensitive information, or download and run malicious files.
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
- Microsoft Windows Malicious Software Removal Tool
You should also run a full scan. A full scan might find other, hidden malware.
Protect your sensitive information
This threat tries to steal your sensitive and confidential information. If you think your information has been stolen, see:
You should change your passwords after you've removed this threat:
Prevent malware infections from spam emails
- For enterprise users:
- Follow the appropriate Exchange Online Protection instructions to suit your business needs.
- Learn about how Office 365 can help you block spam using machine learning. See First look at Advanced Threat Protection: new tools to stop unknown malware & phishing attacks for details.
- Be aware of the dangers in opening suspicious emails. Don't open email attachments or links from untrusted sources.
- The Microsoft SmartScreen filter can also help detect spam. It’s built-in and enabled by default in Microsoft email programs.
- Submit spam and non-spam messages to Microsoft for analysis.
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.
