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Method and device for unlocking file

A file unlocking and target file technology, applied in the direction of platform integrity maintenance, etc., can solve problems such as lack of ability, inability to break the layer-by-layer protection of virus-infected files, and weak resistance to driver-level malicious programs.

Active Publication Date: 2015-06-24
北京鸿享技术服务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing security software has a single means of unlocking and shredding virus-infected files, and cannot break through the layers of protection set up for virus-infected files, and the ability to resist is not strong
Traditional security software vendors have only solved part of the "undelete" problem, and often show a certain lack of ability in the attack and defense of the operating system kernel state, and the ability to resist driver-level malicious programs (Rootkit) is relatively weak

Method used

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  • Method and device for unlocking file

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Embodiment Construction

[0079] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0080] refer to figure 1 , which shows a flow chart of the steps of an embodiment of a file unlocking method of the present invention, which may specifically include the following steps:

[0081] Step 101, attempting to perform a delete operation or a write operation on the target file;

[0082] In the user mode of the Windows operating system, you can use the functions DeleteFile and ZwDeleteFile to try to delete the target file; in the kernel mode of the Windows operating system, you can use the function ZwDeleteFile to try to delete the target file. Specifically, by calling the operating system application program interface API: DeleteFile of the file deletion routine located in the user state; then calling the operating syste...

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Abstract

The invention provides a method and device for unlocking a file. The method comprises the steps that deletion operation or write operation tries to be carried out on the target file; if the deletion or write operation cannot be executed on the target file, the attribute of the target file is obtained; if the attribute of the target file is read only, a user-defined application program interface for changing the file attribute is called to remove the read only attribute of the target file. A provided file unlocking and shredding mechanism is safe, reliable and high in success rate, a file self-protection behavior of a rogue program can be recognized in a complex client side environment and can be resisted, and the resisting capacity to the attack and defense of a driving-level rogue program is enhanced.

Description

[0001] The patent application of the present invention is a divisional application of the Chinese invention patent application with the filing date of June 27, 2011, the application number of 201110175414.4, and the title of "A Method and Device for Unlocking Files". technical field [0002] The invention relates to the technical field of computer security, in particular to a file unlocking method and a file unlocking device. Background technique [0003] A computer virus refers to a set of computer instructions or program codes that are inserted into a computer program by the compiler to destroy computer functions or data, affect the use of the computer, and are capable of self-replication. Once a computer is infected with a virus, the computer usually shows that its files are increased , delete, change the name or attribute, and move to other directories. These operations of the virus on the computer files may cause a series of problems such as the inability to run normal p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/56
Inventor 王宇潘剑锋
Owner 北京鸿享技术服务有限公司
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