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图片木马构造工具:EDJPgcom一句话图片插入

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根据提供的文件信息,以下是对"edjpgcom图片插入一句话工具"的知识点分析。 ### 标题知识点 1. **工具名称**: "edjpgcom图片插入一句话工具" 是一个专门用于向JPEG图片中嵌入数据的工具。该工具可能允许用户嵌入特定类型的数据,而"一句话"可能指的是一段短文本信息。 2. **工具功能**: 该工具主要功能是在图片文件(JPEG格式)中插入额外的信息,而不破坏图片的显示效果。在图片文件中嵌入数据是数字隐写术(Steganography)的一种应用。 3. **潜在用途**: 通常这类工具可被用于合法目的,比如版权信息的隐藏、数据保护等。但在不法分子手中,它也可能被用于制作图片木马(也称为图片漏洞利用工具),通过图片隐藏恶意代码,对目标系统进行攻击或控制。 ### 描述知识点 1. **描述重点**: 描述中仅提供了工具的名称,没有具体说明工具如何操作或其详细的用途,但可以推测该工具被设计用于在JPEG图片中嵌入信息。 2. **使用情景**: 如果被用于合法目的,该工具可以用于数字水印的嵌入,增强作品版权保护。但如果是用于恶意目的,则可能涉及到攻击者对特定目标进行信息收集或控制的活动。 ### 标签知识点 1. **图片木马构造**: 标签指出工具可能与制作图片木马有关。图片木马是一种攻击方式,攻击者利用看似普通的图片文件(实际上包含恶意代码)诱使受害者下载和打开,从而执行攻击代码对系统进行破坏或控制。 2. **安全风险**: 使用该工具可能带来的安全风险包括信息泄露、系统被恶意软件感染、服务拒绝攻击(DoS)等。特别是通过网络流传的图片,可能对网络系统安全构成威胁。 ### 压缩包子文件的文件名称列表知识点 1. **文件名称唯一性**: 该列表仅包含"edjpgcom图片插入一句话工具"这一项,说明这是一个单一功能的工具或软件包。 2. **文件封装方式**: "压缩包子"可能表明该工具被封装在一个压缩包内,便于用户下载和传输。这种封装方式也常见于恶意软件的传播,因此用户在下载和使用时需要格外谨慎。 ### 综合知识点 1. **数字隐写术**: 该工具涉及到的技术是数字隐写术,这是一种隐藏信息的古老艺术,如今在数字领域有广泛的应用。隐写术通过改变文件的某些特性(如图片像素中的最低有效位),来嵌入其他数据,而不影响原始文件的正常使用。 2. **恶意软件与安全防御**: 如果该工具被用于制作恶意软件,那么它属于安全领域的灰色地带。了解和掌握这种工具的工作原理,对于网络安全人员来说是必要的,因为这有助于他们更好地检测和防御此类攻击。 3. **法律和道德问题**: 使用该工具进行非法活动是违反法律的。随着网络安全法律法规的完善,利用数字隐写术进行攻击和破坏活动会受到法律的严惩。因此,对这些技术的应用应当建立在道德和法律允许的范围之内。 综上所述,"edjpgcom图片插入一句话工具"是一个具有双重属性的技术工具。在正当使用下,它可以用于数字版权保护等目的;而在恶意利用下,它可能成为网络攻击的一种手段。因此,对这种工具的了解和使用应当加以严格的控制和监管。

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edjpgcom is a free Windows application that allows you to change (or add) a JPEG commment in a JPEG file. That's all it does. All other fields in a JFIF or Exif file are left untouched. It even keeps the filesystem timestamp! It's based on the rdjpgcom and wrjpgcom utilities from the Independent JPEG Group's 6b distribution. (Heck, it's essentially these two programs combined with a basic dialog control.) Installation: ------------- Copy the executable egjpgcom.exe someplace convenient. It's completely self contained and uses no registry entries. Usage: ------ edjpgcom "filename.jpg" The quotes around the filename are *required* (Don't ask.) A dialog will popup. The text area will contain any existing comment text. You can cut and paste using the usual Ctrl-C, Ctrl-V, Ctrl-X. If you press OK, this text will be added to your file and a backup file will be created with the same name as your file but with a ".bak" added. If you don't want this backup file, check the 'Delete Backup?' checkbox. Of course pressing Cancel will exit without doing anything. If you want to delete a comment, just delete all the comment text. Edjpgcom will then delete the comment section. Now I don't really expect this program to be used from the command line. Instead, I assume that you will add it to either the external programs list of another editing/managment program OR add it to the context menu for JPEG files in windows. NOTE: Changing file associations akin to editing your registry. Be careful and be sure you know how to undo anything you might have done. For example, in Windows 98: * open Windows Explorer * View -> Folder Options * select the "File Types" tab * Find and select the JPG file type(s) NOTE: Sometimes you may not be able to find the JPG File types If this happens see below. * press the "Edit" button * press the "New" button * for the "Action:" enter Comment * for the "Application used..." enter "c:\full\path\to\edjpgcom.exe" "%1" where the quotes are important (if you do not use quotes around the program path name, Windows may assume only short filenames can be passed to the program) and replacing c:\full\path\to with the correct directory path where you put the executable. Now "Comment" should appear when you right-click on a JPEG file. This works well in combination with "View as webpage" or "Thumbnails". In Win2k, the procedure is the same except you get to the add action dialog this way: * Open "Windows NT Explorer" * Tools -> Folder Options * select the "File Types" tab * Find and select the JPG file type(s) * press the "Advanced" button NOTE: Sometimes you may not be able to find the file type associated with .jpg files. This usually happens after several programs have reset your file associations. I use an utility from PC Mag called "Freedom of Association" to reassign the .jpg extension to a registered type. Another alternative is to add a shortcut to egjpgcom.exe to your Windows "Send To" directory. You can then send a file to edjpgcom. It will politely refuse to handle a non-jpeg file. If you use ThumbsPlus to manage your photos (highly recommended), you can add edjpgcom as an external program using the following steps: * Right-click on the tool bar to bring up the customization window * Press the "External Programs" button * Enter the full pathname to edjpgcom.exe in the Program box. * Make sure the "Short Names", "multiple files" and DDE are NOT checked. Now you will have an icon on your toolbar and a menu item on the right-click popup window for image files. Template File ------------- If the environment variable EDJPGCOM_TEMPLATE exists and points to a readable file, then the contents of this file will be used as the default comment when adding a comment to a file that does not already have one. License: -------- Permission to use this software for any purpose, without fee, is hereby granted. THIS SOFTWARE IS BEING PROVIDED AS IS, without any express or implied warranty. If you like it send me one of your photos (email or a postcard) at: [email protected] Erik Magnuson 7490 Windover Way Titusville, FL 32780 Send comments/bug reports to [email protected]. How it works: ------------- When egjpgcom starts, it opens the file, extracts the comments and then closes the file again. When you press OK, it creates a temporary file with the same path and filename as the original, but with an random 3 digit extension instead of ".jpg". It then copies the header data from the original file, the new comment, and the rest of the original file to this temporary file. It closes the temp file and attempts to rename the original file to ".bak". If this succeeds, it will rename the temporary file to have the original filename. Last, it deletes the backup file if that options is selected. What this means is that if egjpgcom should crash for any reason, you should still have your original file (unless you deleted it!). You might have to clean up a .nnn file but that's it. It's been tested on Win2k, NT 4.0 SP5, Win95a, Win98, and Win98SE. Limitations: ------------ * The egjpgcom program itself only supports a single filename as input. However, if multiple files are selected and "Add Comments" context menu is chosen, multiple copies of egjpgcom will be started. Hopefully, the filename in the title bar will help you figure out which is which. * While a JPEG comment field can up to 64k chars, edjpegcom is limited to 32000 characters by the Win32 edit dialog. * egjpgcom uses the DOS/Windows CRLF convention for line terminators. It will convert any plain CR or LF to a CRLF pair. * edjpgcom has not been tested with multiple COM sections in a single file. * edjpgcom does not get any comment data from other comment fields like Photoshop FileInfo (IPTC/NAA subset) Exif ImageDescription Exif UserComment * Error messages are primitive. Credits: -------- This software is based in part on the work of the Independent JPEG Group. Thanks to Jacob Navia for lcc-win32. rec.photo.digital for all the information. History: -------- 17 Feb 2001 v0.1 foisted upon an indifferent world 19 Feb 2001 v0.2 Fixed Win9x file creation timestamp (well, it worked on Win2k!) 10 Apr 2001 v0.3 Deletes comment section if empty comment entered Does not write file is comment text unchanged and "OK" pressed. Added a simple program icon. 19 Dec 2001 v0.4 Larger dialog box size Defaults to delete backup Optional template file if empty comment block. ------------------------------ 可以在正常的图片中插入一句话代码。
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