Fake invoice ISO drops trojan libcef.dll that extracts shellcode from a disguised PNG

basedjensen · x · 2026-10-28

vxunderground breaks down a phishing attack on a Malaysian company: an invoice-themed ISO file containing open.exe, libcef.dll, and a disguised PNG. open.exe invokes libcef.dll via a legitimate Chromium Embedded Framework export, but the DLL is fake — it reads the PNG and extracts shellcode from it. The sample had low detection on VirusTotal and was first seen yesterday.

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