While reviewing the log files while cleaning up a hacked Magento website recently we ran across a reminder that a common security practice isn’t full proof. With the Magento software and some other software the software has a built in capability to use a non-standard address for the login page for the admin portion of the website. With other software that is commonly promoted security feature to be implemented with an add-on.
The value of that is limited as while there are widespread claims that there are frequent brute force attacks against admin passwords, in truth what is going on are dictionary attacks, which involved trying to log in using common passwords and that can easily be prevented from being successful by using a strong password. There is the possibility of some value of doing this in a far more limited situation where the hacker has access to valid login credentials for the website, but it turns out that there can be various ways to get access to login page without knowing that address.
In the logs of this hacked website we were seeing many POST requests to this address:
When visiting the page we saw that the Magento admin login page was showing. In looking into if that all there was that we found that this is something that hackers are looking around with pages like that generated by various extensions.