Cybercriminals frequently abuse free companies to host malware or to arrange command-and-control (C2) infrastructure as a result of they know connections to such companies received’t elevate suspicion inside networks. Such is the case with TryCloudflare.com, which was just lately abused in a widespread marketing campaign to ship distant entry trojans (RATs).
TryCloudflare is a tunneling characteristic that permits customers to proxy site visitors via Cloudflare’s content material supply community. The current campaigns, independently noticed this yr and reported this week by researchers from security companies Proofpoint and eSentire, concerned phishing emails that resulted within the obtain of a number of malware households, together with XWorm, VenomRAT, PureLogs Stealer, AsyncRAT, GuLoader and Remcos.
“Marketing campaign message volumes vary from tons of to tens of 1000’s of messages impacting dozens to 1000’s of organizations globally,” researchers from Proofpoint wrote of their report. “Along with English, researchers noticed French, Spanish, and German language lures. […] Lure themes fluctuate, however sometimes embody business-relevant matters like invoices, doc requests, package deal deliveries and taxes.”
