add comodo scan backend

MalwareMultiScan.Backends/Backends/Implementations/ComodoScanBackend.cs

@@ -0,0 +1,31 @@
+using System;
+using System.IO;
+using System.Text.RegularExpressions;
+using MalwareMultiScan.Backends.Backends.Abstracts;
+using Microsoft.Extensions.Logging;
+
+namespace MalwareMultiScan.Backends.Backends.Implementations
+{
+    public class ComodoScanBackend : AbstractLocalProcessScanBackend
+    {
+        public ComodoScanBackend(ILogger logger) : base(logger)
+        {
+        }
+        
+        public override string Id { get; } = "comodo";
+        
+        public override DateTime DatabaseLastUpdate =>
+            File.GetLastWriteTime("/opt/COMODO/scanners/bases.cav");
+
+        protected override string BackendPath { get; } = "/opt/COMODO/cmdscan";
+        
+        protected override Regex MatchRegex { get; } =
+            new Regex(@".* ---> Found Virus, Malware Name is (?<threat>.*)", 
+                RegexOptions.Compiled | RegexOptions.Multiline);
+
+        protected override string GetBackendArguments(string path)
+        {
+            return $"-v -s {path}";
+        }
+    }
+}