TrojanDownloader:MSIL/Crydap.A

Use the following free Microsoft software to detect and remove this threat:

• Microsoft Defender Antivirus 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.

Configure your Trust Center to disable macros

Set your Trust Center in Microsoft Office programs to 'Disable all except digitally signed macros' to control potential macro installations on machines in your network. Know that some malware would try to get into your system through macros, which usually comes in through the email infection vector. 

See the Office support page to Enable or disable macros in Office files for details. Administratively disabling macros can help prevent malware-ridden macros from downloading ransomware or other threats onto your machine or your network.

For more details about macros, ransomware, advanced persistent threats, and how you can protect your enterprise from them, see the following report and video:

• Threat intelligence report: Macro malware
• Ransomware 101: How to Protect and Mitigate your environment from Malware.

Use Office 365 Advanced Threat Protection

Use Office 365's machine learning capability to help your network administrators block dangerous email threats. See the Overview of Advanced Threat Protection in Exchange: new tools to stop unknown attacks, for details.

Use cloud protection

The Microsoft Active Protection Service (MAPS) uses 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. 

• Check if MAPS is enabled on your PC

Get more help

You can also see our advanced troubleshooting page for more help.

If you’re using Windows XP, see our Windows XP end of support page.