Trend Micro Inc.

Brendan M Johnson

A cloud computing infrastructure hosts a web service with customer accounts. In a customer account, files of the customer account are listed in an index. Files indicated in the index are arranged in groups, with files in each group being scanned using scanning serverless functions in the customer account. The files in the customer account include a compressed tar archive of a software container. Member files of a compressed tar archive in a customer account are randomly-accessed by way of locators that indicate a tar offset, a logical offset, and a decompressor state for a corresponding member file. A member file is accessed by seeking to the tar offset in the compressed tar archive, restoring a decompressor to the decompressor state, decompressing the compressed tar archive using the decompressor, and moving to the logical offset in the decompressed data in memory.

Scanning of files in a customer account of a cloud service for cybersecurity

A cloud computing infrastructure hosts a web service with customer accounts. In a customer account, files of the customer account are listed in an index. Files indicated in the index are arranged in groups, with files in each group being scanned using scanning serverless functions in the customer account. The files in the customer account include a compressed tar archive of a software container. Member files of a compressed tar archive in a customer account are randomly-accessed by way of locators that indicate a tar offset, a logical offset, and a decompressor state for a corresponding member file. A member file is accessed by seeking to the tar offset in the compressed tar archive, restoring a decompressor to the decompressor state, decompressing the compressed tar archive using the decompressor, and moving to the logical offset in the decompressed data.

Random access of a member file in a compressed tar archive

A file is stored in a public cloud storage. A serverless computing platform receives an event notification that the file has been stored and, in response, creates an instance of an ephemeral environment wherein a security module is executed. The security module creates a memory-mapped space with memory locations that are mapped to the entire content of the file but does not allocate memory for all of the memory locations. Instead, the security module retrieves sections of the file from the public cloud storage as these sections are accessed in their designated memory locations in accordance with the memory mapping, allocates memory for the retrieved sections, stores the retrieved sections in their designated memory locations, and scans the retrieved sections in their designated memory locations for malicious code. The security module continues scanning the file in sections until relevant sections of the file have been scanned.

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Coppell, TX, United States of America

Brendan M Johnson