A note to anyone reading this.
Prevention measurements
- Ensure you use the latest browser version
- Disable javascript if possible
- Use Firefox with addon "noscript" (!)
- Download and install some free antivirus software, make sure it stays updated
- Use
http://www.avg.com.au/index.cfm?FREE onlinescan to test suspicious links you are given in emails or find online.
Keep your Joomla versions up-to-date.
Joomla! versions, prior to the current (at this time 1.5.14) have several known (and resolved) exploits, both of which are mentioned in the first post as the discovered compromise attempts (attempting to acquire admin logon and even older, PHP register_globals ON allowing configuration.php variable injections) Both these exploits are covered by the practices in the Security Guide
http://forum.joomla.org/viewtopic.php?f=432&t=335090, with the second only being relevant to J! 1.0 releases prior to J! 1.0.13 AND only if PHP register_globals are enabled on the server.
Read the two links provided in the Security link above as they BOTH give great info.