Doomjuice.B is similar to to the original Doomjuice.A. This variant tries to improve
the Distributed Denial-of-Service attack on www.microsoft.com. The size of this variant
is smaller, as Doomjuice.B does not contain or drop the source code of Mydoom.A.
After entering the system Doomjuice copies itself to the Windows System Directory
as 'regedit.exe'. The copy is added to the registry as:
Distributed Denial-of-Service Attack
Doomjuice.B attacks www.microsoft.com via HTTP protocol like Doomjuice.A, but it tries
to improve the Distributed Denial-of-Service attack. It sets random HTTP headers to
make it more difficult to filter out the attack traffic:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
User-Agent: Mozilla/4.0 (compatible; MSIE 5.0; Windows NT 5.0)
Accept-Encoding: gzip, deflate
In addition, this variant starts 32-182 parallel threads to download the main page
in an infinite loop, instead of the 16-96 of the previous variant.
The attack will trigger after 12th of February.
For more information on Doomjuice.A see: