OSSEC dcid-fork changelog. This are the changes I have been pushing live 
to my personal OSSEC fork. It is also integrating some changes we have done
for Sucuri's internal use.

Every few months we create a stable release with these changes mostly for
internal use, but it is open for anyone to get as well.

You can download the releases from: http://dcid.me/ossec

Or from (bitbucket.org/github.com)/dcid/ossec-hids/


Changes with 2016-04
   * Feature: Added a default temp (shared) password for os_authd
   * Feature: Added detection of outdated CMSs on rootcheck: WordPress,
     Joomla & Drupal.
   * Feature: Added geoip change alerts by default on SSHD/WordPress rules.
   * Feature: Added signatures to detect Darkleech, Cdorked and some common
     web backdoors and linux malware.
   * Feature: Added option to negate a pattern when using the OSMatch
     library. Usage of ! at the beginning of the pattern will change the
     behavior to return true when not found. Useful when writing subrules
     when something is not present on the log.
   * Bug fix: Glob() implementation on logcollector. Was very very slow if
     you have a few hundred entries.
   * Bug fix: Rootcheck sigs causing false positives on cpanel servers.
   * Bug fix: Finding right OpenSSL path on Debian.

Changes with 2016-02
   * Feature: Added different_geoip and different_srcip rule types.
   * Feature: Started to properly track the different_* usage so all
     logs have to be different.
   * Feature: Added sshd rules using different_geoip to track some
     types of behaviour anomalies.
   * Feature: Added rules to flag on shellshock activity.
   * Feature: Added frequency option to logcollector commands. 
     You can now specify hourly, or daily or any number of seconds.
   * Feature: Added libgeoip from MaxMind by default and changed 
     installation script to auto download the latest DB from them.
   * Bug fixed: Multiple signatures cleanup and more sane defaults chosen.

Changes with 2015-12
   * Feature: Added integratord
   * Feature: Added slack and pagerduty support to integratord
   * Feature: New signature for the Joomla RCE
   * Bug fix: WordPress decoder to work with the latest plugin.

Changes with 2015-11
  * Feature: Added GeoIP support by default
  * Bug fix: Cleaned up noisy rules
  * Bug fix: Segfault on reported when srcip filter was being used.

Changes with 2015-04
   * Feature: Added syslog-sources to agent control
   * Bug fix: Cleaned up storage format from ossec decoder.
   * Bug fix: Broken memory management on the ossec decoder.
   * Bug fix: Removing noisy/useless web-based rules.

Changes with 2013-07
   * Feature: Added hybrid mode to allow a install to be running in 
     local + agent mode.