These Hackers Were Hiding Malware Behind a Captcha


Hackers are using Captcha methods to bypass automated URL analysis, say security researchers at US-based Cofense, in just the latest creative move by cybercriminals to evade traditional malware detection methods.

The technique lets them fire phishing emails en masse in a manner that bypasses secure email gateways, e.g. that of Mimecast.

The move was identified by Cofense in a campaign in which it was essentially the second phase of a wider network compromise; once hackers obtained the login details of one employee’s account they then used this to amass as many credentials as they can by sending out emails to other

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