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加殼壓縮

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加殼壓縮是一種對EXE檔案的数据压缩及加密保護,可以將EXE檔案壓縮成自我解壓檔案,並能隱藏解壓進程。

在免殺技術里所謂的殼與偽裝殼其實就是壓縮與外層數據偽裝,其實是利用特殊的演算法,對可執行文件與DLL文件里的資源進行壓縮與對文件的描述、版本號、創建日期、修改軟體、系統執行需求等外層數據進行偽裝,用於規避YARA防毒軟體定義的特徵值檢測。

用途

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  • 減少檔案大小:可節省磁碟空間、加速網路傳輸。
  • 加密內容:可以避免程式遭到任意竄改、亦可對防毒軟體免殺。

加殼壓縮技術

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常見的有:

  • IEXPRESS
  • UPX
  • ASProtect
  • WinRAR
  • NSPack
  • DarkCrypt

参见

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加殼壓縮
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