TXT files are what we often call notepad files, text files. Maybe friends will ask: What are the dangers of TXT files? It can't be a mistake. There is a crisis behind the TXT file, so be really careful.
First, TXT files - TXT files with hidden extensions
If you receive an email attachment like this: QQ Lianghao broadcasts .txt, do you think it must be a plain text file? Not necessarily! Its actual file name may be QQ Lianghao Broadcast .txt.
In the registry, it means HTML file association. But it will not appear when it is saved as a file name, and this file is actually equivalent to the QQ Lianghao broadcast .txt.html. If you double-click on it and think it will open Notepad, but it calls HTML to run, then only God knows what it is going to do, delete the file? Formatting a hard drive? It's possible! Know the dangers of opening attachments at will.
Second, TXT file - identification and prevention methods
1. If the TXT file shows not the icon of the text file, but the flag of the file type is not defined, this is the best way to distinguish it from a normal TXT file.
2. Another way to identify is to display the full name of the file name on the left side of "My Computer" when viewing "by web page method". Here again, I would like to remind you to pay attention to the file name of the attachment in the received email, not only to see the extension displayed, but also to pay attention to what the icon actually displays.
3. For files that appear to be TXT in the attachment, you can download it and select "Open with Notepad" with the right mouse button, which will be very safe.
Third, TXT files - malicious fragmented files
Another type of dreaded TXT file is a file called "fragmented object" (extension SHS) in Windows, which is usually disguised as a text file and distributed through email attachments, such as QQ number .txt.shs. Since the real suffix SHS doesn't show up, it would be horrible to include commands like "format" in the file! In addition, it has a strong concealment:
1. The default icon of the fragmented object file is an icon similar to the notepad file, which can easily be mistaken for a document with some text, and the user is not vigilant about it.
2. In the default state of Windows, the extension of the "fragmented object" file is hidden, even if you remove the "√" in front of "Hide the extension of known file types" in [Explorer]→ [Tools]→ [Folder Options]→ [View], SHS is still hidden, because Windows supports double extensions, such as "QQ number .txt.shs" The name displayed is always "QQ number .txt".
3. Even if you are suspicious, you will not find any problem with this file with any antivirus software, because this file itself has no virus, is not executable, and is still a system file. Would you be suspicious of such a file?
Fourth, TXT file - prevention method
Under the HEY_CLASSES_ROOTShellScrap key of the registry editor, there is a key-value "NeverShowExt", which is the culprit that causes the SHS file extension not to be displayed. Delete this key value and you can see it.
You can also change the default icon of the Fragmented Object file. Open [Explorer]→ [View]→ [Folder Selection]→ [File Type]→ [Registered File Type]→ [Fragmented Object], click [Edit], and click the [Change Icon] button in the [Edit File Type] dialog box. Open the C:WINDOWSSYSTEMPifmgr.dll and select a new icon.
Fifth, TXT file - facelifted Outlook attachment
In addition to the two types of dangerous TXT files mentioned above, there is also a facelifted Outlook email attachment! What looks like a TXT file is actually an EXE file!
When you receive one such message with Outlook 2000, it will show that this is a message with attachments, if you double click to open it, Outlook will prompt: Some objects carry viruses that may cause harm to your computer, so make sure that the source of the object is reliable.
Sixth, TXT file - identification method
Don't be afraid, despite its extreme confusingness, it will still show some pawns:
1. It is actually an OLE object, not an attachment, and its selection box is different from the selection box of the attachment. The menu that appears with the right mouse button is different.
2. When double-clicking to open it, the safety prompt is different from the safety tip of the attachment, which is very important. At this time, you should select "NO", then click the right mouse button, select "Edit Package", and select "YES" when prompted whether to trust the object, and the original form will appear in the content box on the right side of the object wrapper.
3. Because it is not an attachment, there is no dialog box when you select [File] → [Save Attachment].
4. Since not all email sending and receiving software supports object embedding, the format of such emails may not be recognized by some software. However, Outlook is widely used, especially in relatively large companies with their own mail servers, so it is still necessary to remind everyone to be careful about embedding objects. Not only Outlook, but also Word, Excel and other software that supports embedded objects can be transformed to confuse people.
Everyone also understands the terrible thing about TXT files, in fact, as long as you are careful enough and follow the prevention methods mentioned in this article, there will be no danger.
|
Posted on 1/2/2015 6:07:43 PM
|
|
|
