Robuta

https://www.sophos.com/fr-fr/blog/tag/image-spam
image spamblog
https://www.bitdefender.com/en-us/news/bitdefender-labs-reports-on-the-most-common-types-of-image-and-text-spam-in-2007-546
bitdefender labson thereportscommontypes
https://www.trendmicro.com/vinfo/us/security/news/cybercrime-and-digital-threats/malicious-spam-campaign-uses-iso-image-files-to-deliver-lokibot-and-nanocore
A malicious spam campaign conducted in April used ISO image files to deliver the notorious LokiBot and NanoCore trojans.
iso imagemaliciousspamcampaignuses