The return of image-based spam

After a two year absence, IBM X-Force is reporting [] a significant spike in image-based spam.   
“Since March 20th, we have been witnessing a rebirth of image-based spam.  At first, we saw a small trial of image-based spam, reaching 5-10%.  Then, in late April, we saw another blast (this time a much bigger effort) reaching 15-22% of all spam, according to researchers Ralf Iffert and Holly Stewart.

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