Orome1 writes: Imperva released a report analyzing the content and activities of an online hacker forum with nearly 220,000 registered members, although many are dormant. The forum is used by hackers for training, communications, collaboration, recruitment, commerce and even social interaction. Commercially, this forum serves as a marketplace for selling of stolen data and attack software. The chat rooms are filled with technical subjects ranging from advice on attack planning to solicitations for help with specific campaigns. The forum is also a place where curious neophytes can find “how-to-hack” tutorials on various methods.