Now, researchers at Menlo Security deconstructing a new attack have also found threat actors using Discord for hosting malicious payloads.
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Named ISOMorph, the campaign uses HTML smuggling to drop the first stage malware through the web browser.
Attack the browser
The researchers explain that HTML smuggling helps deliver malware by effectively bypassing various network security solutions including sandboxes, legacy proxies, and firewalls.
“We believe attackers are using HTML Smuggling to deliver the payload to the endpoint because the browser is one of the weakest links without network solutions blocking it,” notes Menlo Security in a blog post analyzing the ISOMorph campaign.
Once it’s in place, the dropper fetches the malicious payload and installs remote access trojans (RATs) that allow the attacker to use the infected machine for their illegitimate purposes.
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