Just an FYI for anyone using this plug in and also for the developers to be aware of this issue.
I've been using Ultimate Security for awhile with very few problems. However the latest update of this plugin triggered a "malware alert" from Wordfence.
Alert generated at Sunday 22nd of September 2013 at 06:32:07 PM
* File contains suspected malware URL: /home/xxxxxx/public_html/wp-content/plugins/ultimate-security-checker/languages/default.po
* File contains suspected malware URL: /home/xxxxxxx/public_html/wp-content/plugins/ultimate-security-checker/securitycheck.class.php
* File contains suspected malware URL: /home/xxxxxxx/public_html/wp-content/plugins/ultimate-security-checker/languages/ultimate-security-checker.pot
No other files on my site were infected and no other malware warnings.
I've removed the files. And the plug in as well.