The Spamna (=Spammer Node Add) module checks for users who have attempted to do a disallowed "node/add" and thus judges that they are spammers. Optionally it deletes the users found.
Intershop and Drupal don't follow the same schema about password storage.
Drupal uses SHA512 algorithm, while Intershop uses MD5.
This module overrides checking methods on Drupal side to allow to copy/paste the Intershop password hash directly into Drupal, and automatically rewrite Intershop password into Drupal password to match stronger policy at the first user login.
Features
Support for Intershop's password during authentication process,
Rewrite password according to Drupal algorithm, at the first user login.