System, method, and computer program product for preventing a modification to a domain name system setting

Patent metadata

Field	Value
Publication number	US-9294505-B2
Application number	US-201414518907-A
Country	US
Kind code	B2
Filing date	Oct 20, 2014
Priority date	Aug 13, 2010
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A system, method, and computer program product are provided for preventing a modification to a domain name system setting. In use, an attempt to modify a domain name system setting is detected. Additionally, a source of the attempt and an attribute of the modification are verified. Further, the modification to the domain name system setting is prevented, based on the verification.

First claim

What is claimed is:

1. A system, comprising:
a processor;
a memory configured to store a domain name system setting; and
logic, wherein the logic is configured to:
detect an attempt for modification of the domain name system setting stored within the memory;
identify an attribute of the modification;
verify a source of the attempt by generating a hash of the source in order to compare the source against a whitelist including predetermined non-malicious sources;
verify the attribute of the modification by comparing the attribute of the modification against at least one of a whitelist including known good attributes and a blacklist including known at least potentially malicious attributes; and
prevent the modification of the domain name system setting responsive to the verifying of the source of the attempt being indicative that the source is a potentially malicious source and the verifying of the attribute of the modification being indicative that the attribute of the modification is a potentially malicious attribute.

2. The system of claim 1 , wherein the logic is further configured to retrieve at least one of the whitelist including predetermined non-malicious sources, the whitelist including known good attributes, and the blacklist including known at least potentially malicious attributes from the memory.

3. The system of claim 1 , wherein the logic is further configured to retrieve at least one of the whitelist including predetermined non-malicious sources, the whitelist including known good attributes, and the blacklist including known at least potentially malicious attributes from a database.

4. The system of claim 1 , wherein the logic is further configured to retrieve at least one of the whitelist including predetermined non-malicious sources, the whitelist including known good attributes, and the blacklist including known at least potentially malicious attributes from a server.

5. The system of claim 1 , wherein the domain name system setting includes a setting of a value in a registry.

6. The system of claim 1 , wherein the domain name system setting includes an Internet Protocol (IP) address setting.

7. The system of claim 1 , wherein the attempt for modification of the domain name system setting includes an attempt to change or replace an Internet Protocol (IP) address to a malicious IP address.

8. The system of claim 1 , wherein the attempt for modification of the domain name system setting includes an attempted write operation to the domain name system setting.

9. The system of claim 1 , wherein the attempt for modification of the domain name system setting includes an attempted create operation of the domain name system setting.

10. The system of claim 1 , wherein the logic is further configured to intercept the attempt for modification of the domain name system setting.

11. The system of claim 1 , wherein the source of the attempt includes a process.

12. The system of claim 1 , wherein the source of the attempt includes a file.

13. The system of claim 1 , wherein the source of the attempt is further verified by comparing the source of the attempt against a blacklist containing known at least potentially malicious sources.

14. The system of claim 1 , wherein the whitelist includes predetermined non-malicious sources including a list of hashes of the predetermined non-malicious sources.

15. The system of claim 14 , wherein the logic is further configured to verify the source of the attempt by comparing the hash of the source against the list of hashes of the predetermined non-malicious sources.

16. The system of claim 1 , wherein the source of the attempt is verified at a first server and the attribute of the modification is verified at a second server.

17. The system of claim 1 , wherein the source of the attempt and the attribute of the modification are verified at a single server.

18. The system of claim 1 , wherein preventing modification of the domain name system setting includes blocking the modification of the domain name system setting.

19. The system of claim 1 , wherein preventing modification of the domain name system setting includes undoing the modification of the domain name system setting.

20. The system of claim 1 , wherein preventing modification of the domain name system setting includes removing the source of the attempt.

Assignees

• Mcafee Inc

Inventors

• Kumar Lokesh
• Ramachetty Harinath Vishwanath
• Kishore Nandi Dharma

Classifications

• G06F21/554 Primary

  involving event detection and direct action · CPC title

• H04L63/1416

  Event detection, e.g. attack signature detection · CPC title

• G06F21/56

  Computer malware detection or handling, e.g. anti-virus arrangements · CPC title

• H04L63/1466 Primary

  Active attacks involving interception, injection, modification, spoofing of data unit addresses, e.g. hijacking, packet injection or TCP sequence number attacks · CPC title

• H04L63/1483

  service impersonation, e.g. phishing, pharming or web spoofing (detection of rogue wireless access points H04W12/12) · CPC title