Spammers are using a virtual stripper as bait to dupe people into helping criminals crack codes they need to send more spam or boost the rankings of parasitic Web sites. A series of photographs shows “Melissa,” no relation to the 1999 worm by the same name, with progressively fewer clothes and more skin each time the user correctly enters the characters in an accompanying CAPTCHA. The CAPTCHAs that Melissa feeds to users are, in fact, legitimate codes snatched from Yahoo Mails signup screens.”]
Source: https://www.csoonline.com/article/2122327/spammers-employ-stripper-to-crack-captchas.html