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豪華賞品がもらえるプレゼントカレンダーを紹介！Qiita Advent Calendar 2021 キックオフLIVE詳しくはこちら
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More than 5 years have passed since last update.

@nyamage

Macでふとシェルコードを逆アセしたいと思ったら

MacSecurity

objdumpを使う為に、binutilsをインストールする

brew install binutils

おもむろに以下を叩く

gobjdump -b binary -m i386 -M intel -D shellcode.bin

-b binaryを指定することで、headerのないバイナリファイルでも読み込んでくれる
-M intelでintel記法でアセンブリが出力される
-m i386で対象のアーキテクチャをx86として指定している
-D 全てのセクションをディスアセンブリする

ついでに16進数+ASCIIでみたいと思ったら

od -tx1c shellcode.bin
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13
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