<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Opcodes · Diary of a Lost Honeypot</title><link>https://blog.efespain.com/en/tags/opcodes/</link><description>A honeypot in some corner of the network. Every infection, a story worth telling.</description><generator>Hugo</generator><language>en</language><managingEditor>eFeSpain</managingEditor><webMaster>eFeSpain</webMaster><copyright>2026 eFeSpain</copyright><lastBuildDate>Sat, 01 Aug 2026 12:00:00 +0000</lastBuildDate><atom:link href="https://blog.efespain.com/en/tags/opcodes/index.xml" rel="self" type="application/rss+xml"/><item><title>Mirai laid bare: 16 methods and a one-byte XOR</title><link>https://blog.efespain.com/en/chapter-4/</link><pubDate>Sat, 01 Aug 2026 12:00:00 +0000</pubDate><guid>https://blog.efespain.com/en/chapter-4/</guid><description>The bot from the last chapter kept its config encrypted and its orders under lock and key. Ghidra spills the lot: the decryption (a laughable XOR), the botnet's real name, its C2 protocol and its full arsenal — without handing out weapons.</description></item></channel></rss>