[nsp-sec] Chatty DNS malware

Scott A. McIntyre scott at howyagoin.net
Wed Jun 29 23:29:19 EDT 2011


Hi,

Anyone recognise these types of domains?

http://pastebin.com/MGnA6FTZ

I'm guessing it may be the recently highly-publicised TDL-4, but don't 
have more to go on than the domain queries and some HTTP POST's to port 
80 on those domains to the /news/ URL path.

For those unable to get to pastebin for nannyware reasons:

arinpvkdxzwrqi.biz
arinpvkdxzwrqi.com
arxyrfuqitmfnn.info
arxyrfuqitmfnn.org
avohwrkqkqktvns.biz
avohwrkqkqktvns.com
bexotcvkpoktsvqm.info
bexotcvkpoktsvqm.org

And so on.

I'm seeing about 600 unique domains per hour, with the domains rarely 
repeated in queries/attempts to access after that time period.  Most of 
the domains are queried in at least two top-level-domains (such as the 
ones above) but not all..

Just looking for confirmation on the malware if possible; having a tough 
time getting a sample from infected systems so far.

cheers,

Scott A. McIntyre
Telstra




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