Linux Security detects Joomla 1.5 Websites as PHP:Backdoor/Brobot.h
after the "F-Secure Hydra Update 2013-04-22_03" - "hydralinux" Version "1366630549" all Websites running Joomla 1.5 are detected as PHP:Backdoor/Brobot.h. The index.php file in the document root are renamed as index.php.virus.
I checked this files and there where clean. Also i scanned the whole server and just this index.php file are detected as virus.
Then I runned kaspersky and nothing, no virus detected. I asume that there was something wrong with that update?!
Currently my Webserver running without Antivirus a need a quick solution.