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Zscaler Research: Adobe Flash Vulnerability CVE-2015-5119 analysis

With the leak of Hacking Team's data, the security industry came to learn about multiple new 0day vulnerabilities targeting Flash, Internet Explorer, Android, etc. As always, exploit kit authors were quick to incorporate these 0day exploits into their arsenal. In this blog, we will be looking at the CVE-2015-5119 exploit payload that we have now seen in the wild. The sample has multiple layers of obfuscation and packer routines. The malicious Flash payload is packed, XOR'ed and stored as a binary data inside a parent Flash file that dynamically unpacks a malicious Flash file and writes it to memory at run time.

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