摘要:
The inventive methods and systems provide an approach to protecting unencrypted sensitive information from being paged out to secondary storage, such as a hard disk, during paging operations. In the described embodiment, a key is provided and is maintained in the main memory of a virtual memory system. Measures are taken to protect the key such as page-locking the key in the main memory to ensure that it never gets paged out to the secondary storage. The described key is a desirably large key that is randomly generated by the operating system. When sensitive information is to be placed in the main memory, it is encrypted with the page-locked key. The encrypted sensitive information can then be paged out to secondary storage without concern about its security. When the encrypted sensitive information is needed by a process or application, it is retrieved from secondary storage and decrypted using the page-locked key. For further protection, the sensitive information can be decrypted into a page-locked page of main memory. More than one key can be used to encrypt and/or decrypt the sensitive information.
摘要:
A stack allocation system and method is described. In one implementation, an attempt is made to allocate N bytes of data to a stack having a fixed depth. A probe size for the stack is determined. Verification is then made to ascertain whether the probe size and the N bytes of data exceed the fixed depth of the stack, prior to allocating the N bytes of data to the stack. In another implementation, the N bytes of data are allocated to a heap; if the probe size and the N bytes of data exceed the fixed depth of the stack.
摘要:
A secure web hosting system is provided. In various embodiments, the secure web hosting system identifies an application that is to be loaded, creates a security token that is unique to the computer system and based on a name of the identified application, receives a request to load the identified application, and creates a process in which to load the identified application, the process having security attributes associated with the created security token. In various embodiments, the secure web hosting system includes an isolation service component that creates a security token based on an application name of an application identified by the configuration file.
摘要:
Tools and techniques for dynamically computing reputation scores for objects are described herein. The tools may provide machine-readable storage media containing machine-readable instructions for receiving requests to dynamically compute reputation scores for the objects, for instantiating protected virtual environments in which to execute the objects, and for computing the reputation score based on how the object behaves when executing within the virtual environment.
摘要:
A facility for applying a software patch is described. Using an automatic patching agent, the facility receives the software patch. In response to receiving the software patch, without user intervention, the facility performs the following acts: First, the facility identifies an instance of an executable module that is currently loaded, and to which the received software patch pertains. Second, the facility applies the received software patch to the identified loaded executable module instance to modify the behavior of the identified executable module instance.
摘要:
The present invention provides a system, method, and computer-readable medium for identifying and removing active malware from a computer. Aspects of the present invention are included in a cleaner tool that may be obtained automatically with an update service or may be downloaded manually from a Web site or similar distribution system. The cleaner tool includes a specialized scanning engine that searches a computer for active malware. Since the scanning engine only searches for active malware, the amount of data downloaded and resource requirements of the cleaner tool are less than traditional antivirus software. The scanning engine searches specific locations on a computer, such as data mapped in memory, configuration files, and file metadata for data characteristic of malware. If malware is detected, the cleaner tool removes the malware from the computer.
摘要:
Improved intrusion detection and/or tracking methods and systems are provided for use across various computing devices and networks. Certain methods, for example, form a substantially unique audit identifier during each authentication/logon process. One method includes identifying one or more substantially unique parameters that are associated with the authentication/logon process and encrypting them to form at least one audit identifier that can then be generated and logged by each device involved in the authentication/logon process. The resulting audit log file can then be audited along with similar audit log files from other devices to track a user across multiple platforms.
摘要:
A method and system that enables a security policy to separate developer-provided detection criteria from an administrator-provided custom policy is provided. The security system allows a developer of detection criteria to provide a signature file containing the signatures that are available for use by a security policy. The security system also allows an administrator of a computer system to specify a custom policy that uses the signatures of the signature file. The developer may distribute the signature file to host computer systems independently of the administrator's distribution of the rules of the custom policy to the host computer systems. When a security enforcement event occurs at the host computer system, the security system applies the rules of the security policy to the event.
摘要:
Techniques described herein enable virtualizing a processor into one or more virtual machines and suspending an operating system of one of the virtual machines from outside of the operating system environment. Once suspended, these techniques capture a snapshot of the virtual machine to determine a presence of malware. This snapshot may also be used to determine whether an unauthorized change has occurred within contents of the virtual machine. Remedial action may occur responsive to determining a presence of malware or an unauthorized change.
摘要:
A secure web hosting system is provided. In various embodiments, the secure web hosting system identifies an application that is to be loaded, creates a security token that is unique to the computer system and based on a name of the identified application, receives a request to load the identified application, and creates a process in which to load the identified application, the process having security attributes associated with the created security token. In various embodiments, the secure web hosting system includes an isolation service component that creates a security token based on an application name of an application identified by the configuration file.