Detecting Malicious Threats Using Ruby on Rails

Ever wonder how to scan any file for a virus on file upload in a Rails application?

We have been using a ruby wrapper to an open source antivirus engine ClamAV®, for detecting trojans, viruses, malware & other malicious threats.

Dependencies

First, you need to install ClamAV’s clamscan binary and/or have clamdscan daemon running on your server. Run following commands to install required binaries:
sudo apt-get install clamav

sudo apt-get install clamav-daemon

sudo service clamav-daemon restart

Optional

If you face any errors related to “clamav-daemon”, run following commands.
sudo freshclam

sudo service clamav-daemon restart
Now we need to install a ruby wrapper clam_scan written for ClamAV® library.

Gem Installation

gem 'clam_scan' #in Gemfile

bundle

How To Scan a file?

It is quite easy to scan any file/input stream using the wrapper.

How to Delete Infected File?

Here is a simple configuration to remove infected files:

Have A Safe Application! 🙂

Thank you for reading!

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