Scareware is a form of malware which uses social engineering to cause shock, anxiety, or the perception of a threat in order to manipulate users into buying unwanted software[1] (or products).
A 2010 study by Google found 11,000 domains hosting fake anti-virus software, accounting for 50% of all malware delivered via internet advertising.
[14] Winwebsec is the term usually used to address the malware that attacks the users of Windows operating system and produces fake claims similar to that of genuine anti-malware software.
In 2005, Microsoft and Washington state successfully sued Secure Computer (makers of Spyware Cleaner) for $1 million over charges of using scareware pop-ups.
[20] In October 2008, Microsoft and the Washington attorney general filed a lawsuit against two Texas firms, Branch Software and Alpha Red, producers of the Registry Cleaner XP scareware.
[21] The lawsuit alleges that the company sent incessant pop-ups resembling system warnings to consumers' personal computers stating "CRITICAL ERROR MESSAGE!
The Complaint also listed Maurice D’Souza as a Relief Defendant, alleged that he held proceeds of wrongful conduct but not accusing him of violating any law.
According to the complaint, the Defendants falsely represented that scans of a consumer's computer showed that it had been compromised or infected and then offered to sell software to fix the alleged problems.
[22][23][24] Another type of scareware involves software designed to literally scare the user through the use of unanticipated shocking images, sounds or video.