If you're careless about what applications you allow to access your Twitter account, don't be surprised if you find the bad guys are spamming tweets out in your name without your permission.
Here's just a small sample of the messages we saw last week, claiming to link to free iPhone 4 offers or tools to help you find out who had unfollowed your Twitter account.
Some of the messages posted from innocent users' Twitter accounts have claimed that it's easy to get your hands on a free iPhone 4:
Whereas others seem to suggest that they offer a way to easily monitor who has unfollowed you on Twitter. (Which is perhaps an attractive tool after Twitter acknowledge earlier this week that the service was suffering from an"unfollowing bug").
Rogue applications we have seen sending these messages include:
Unfollow Monitor App v1.0
Who Unfollowed You v2.9
Tweet Statistics App v1.0
Unfollow Stats App v1.3
Tweet Info App 1.3
Twit Stats App v1.2
Unfollow Details App v1.1
If you were unfortunate enough to grant one of these rogue applications access to your Twitter account, revoke its rights immediately by going to the Twitter website, visiting the Settings/Apps option and revoking the offending application's rights.
Graham Cluley is a senior technology consultant for Sophos and a writer for Sophos Security blog. You can see his profile and his other work here.