AC_RunActiveContent.js trojan

[Dax]

Hi people,

Everybody who works with flash knows that flash also saves a files called
AC_RunActiveContent.js

This file is about 8 kb big.

Suddenly when I loaded my website I noticed that my antivirus started to complain about a AC_RunActiveContent.js trojan.

I went to login on my ftp and discovered that my AC_RunActiveContent.js
file was not the same anymore. The file suddenly became 15 kb big !!

I noticed some script on the bottom of the site, so I replaced this
with the one I stored on my local pc. Now all is ok again.

Please can somebody tell me their experiences on this topic.

Thanks,

Dax