Anatomy of an exploit: CVE 2014-1776
Summary: Cisco Talos analyzed the Internet Explorer 0-day CVE 2014-1776 and found the JavaScript exploit was barely obfuscated, with functions and variables like "dword2data" and "arrLen" in plain sight. The actual IE exploit was hidden in an accompanying Flash file, RC4-encrypted and passed via a variable m_trg to an uncalled JavaScript function oil() that ran eval() on it, with the decoded shellcode also XORed and calling out to download a page from inform.bedircati.com.
Bottom line: Talos reports customers were targeted beginning Thursday, April 24, 2014, with a small number of manufacturing and industrial companies hit and initial samples directed at specific users by name, so the exploit's split across HTML and Flash means inspecting only the web page would have missed the payload entirely.
Read the original at Cisco Talos ↗
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