Byte-distribution analysis of file security
US8087079B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 2007 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Oct 26, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/562
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for scanning files for security, including receiving an unfamiliar file for scanning, if the determining indicates that the mime type is suitable for analysis, then processing a buffer of file data from the unfamiliar file, including generating a histogram of frequencies of occurrence of bytes within a buffer of file data from the unfamiliar file, excluding a designated set of bytes, and if the generated histogram of frequencies of occurrence of the non-excluded bytes deviates substantially from a reference distribution, then signaling that the unfamiliar file is potentially malicious. A system and a computer-readable storage medium are also described and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.