Malicious script detection using context-dependent script emulation
US9444831B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2015 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Oct 22, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/1441
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
One embodiment relates to a computer-implemented process for detecting malicious scripts at a client computer using a malicious script detector. A web page interceptor intercepts an access of web page data at a universal resource locator address. A script preprocessor determines script fragments embedded in the web page data and extracts variable and function names from the script fragments. A context analyzer determines whether the script fragments reference known-good scripts. The context analyzer may check variable and function names in the script fragment against a database of known-good contexts. Those script fragments which were determined to reference known-good scripts may be categorized as non-malicious. An emulator may perform emulation on remaining script fragments which were not determined to reference known-good scripts and not perform emulation on the script fragments which were determined to reference known-good scripts. Other embodiments, aspects and features are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.