Rootkit detection by using HW resources to detect inconsistencies in network traffic
View Patent ↗A technique allows detection of covert malware that attempts to hide network traffic. By monitoring network traffic both in a secure trusted environment and in an operating system environment, then comparing the monitor data, attempts to hide network traffic can be detected, allowing the possibility of performing rehabilitative actions on the computer system to locate and remove the malware hiding the network traffic.
1. A non-transitory computer readable medium with instructions stored thereon, the instructions comprising instructions that when executed cause a programmable device to:
monitor network traffic of the programmable device in an environment controlled by an operating system of the programmable device, producing a first monitor data;
monitor network traffic of the programmable device in a cryptographically secured hardware environment of the programmable device not controlled by the operating system, producing a second monitor data;
compare the first monitor data with the second monitor data; and
indicate whether the first monitor data is the same as the second monitor data.
2. The non-transitory computer readable medium of claim 1 , wherein the instructions that when executed cause the programmable device to compare the first monitor data with the second monitor data comprise instructions that when executed cause the programmable device to:
send the first monitor data from the environment controlled by the operating system to the cryptographically secured hardware environment; and
compare the first monitor data with the second monitor data in the cryptographically secured hardware environment.
3. The non-transitory computer readable medium of claim 1 , wherein the instructions that when executed cause the programmable device to compare the first monitor data with the second monitor data comprise instructions that when executed cause the programmable device to:
send the second monitor data from the cryptographically secured hardware environment to the environment controlled by the operating system; and
compare the first monitor data with the second monitor data in the environment controlled by the operating system.
4. The non-transitory computer readable medium of claim 1 , wherein the instructions that when executed cause the programmable device to compare the first monitor data with the second monitor data comprise instructions that when executed cause the programmable device to:
send the first monitor data and the second monitor data to an external facility; and
compare the first monitor data with the second monitor data in the external facility.
5. The non-transitory computer readable medium of claim 1 , wherein the instructions stored thereon further comprise instructions that when executed cause the programmable device to:
generate an alert indicating the presence of malware on the programmable device.
6. The non-transitory computer readable medium of claim 1 , wherein the instructions that when executed cause the programmable device to compare the first monitor data with the second monitor data comprise instructions that when executed cause the programmable device to:
limit the comparison by an exclude list.
7. The non-transitory computer readable medium of claim 1 , wherein the instructions stored thereon further comprise instructions that when executed cause the programmable device to generate a malware alert in the operating system environment or the cryptographically secured hardware environment.
8. The non-transitory computer readable medium of claim 7 , wherein the instructions that when executed cause the programmable device to generate a malware alert in the operating system environment or the cryptographically secured hardware environment comprise instructions for sending the malware alert via a network.
9. The non-transitory computer readable medium of claim 1 , wherein the instructions stored thereon further comprise instructions that when executed cause the programmable device to:
quarantine the programmable device.
10. A method of detecting malware, comprising:
monitoring network traffic of a programmable device in an environment controlled by an operating system for the programmable device, producing a first monitor data;
monitoring network traffic of the programmable device in a cryptographically secured hardware environment of the programmable device not controlled by the operating system, producing a second monitor data;
comparing the first monitor data with the second monitor data; and
indicating the presence of malware if the first monitor data does not match the second monitor data.
11. The method of claim 10 , wherein monitoring network traffic of a programmable device in an environment controlled by an operating system for the programmable device comprises:
monitoring network traffic in an intrusion detection system executing under control by the operating system.
12. The method of claim 10 , further comprising:
loading firmware for execution in the cryptographically secured hardware environment at powerup of the programmable device.
13. The method of claim 10 , wherein comparing the first monitor data with the second monitor data comprises:
sending the first monitor data to the cryptographically secured hardware environment; and
comparing the first monitor data with the second monitor data in the cryptographically secured hardware environment.
14. The method of claim 10 , further comprising:
quarantining the programmable device responsive to the indication of the presence of malware.
15. The method of claim 10 , wherein comparing the first monitor data with the second monitor data comprises:
sending the second monitor data to an intrusion detection system executing under control by the operating system; and
comparing the first monitor data with the second monitor data by the intrusion detection system.
16. The method of claim 10 , wherein comparing the first monitor data with the second monitor data comprises:
sending the first monitor data from the cryptographically secured hardware environment to an external facility for comparison with the second monitor data; and
sending the second monitor data from the intrusion detection system to the external facility for comparison with the first monitor data.
17. The method of claim 16 , wherein indicating the presence of malware comprises:
receiving an alert generated by the external facility.
18. The method of claim 10 , wherein indicating the presence of malware comprises:
displaying an alert indicating the presence of malware.
19. The method of claim 10 , wherein the first monitor data and the second monitor data comprise network flow data.
20. A programmable device, comprising:
a processor;
an operating system, comprising instructions that when executed by the processor control the processor and provide an operating system environment for other software to execute on the processor;
an intrusion detection software, comprising instructions that when executed by the processor in the operating system environment cause the processor to:
record network traffic of the programmable device as a first monitor data; and
a cryptographically secured hardware environment configured to record network traffic of the programmable device as a second monitor data, wherein the cryptographically secured hardware environment is outside of the operating system environment;
wherein the programmable device is configured to:
compare the first monitor data with the second monitor data; and
generate an alert if the first monitor data is not the same as the second monitor data.
21. The programmable device of claim 20 , wherein the first monitor data and the second monitor data comprise network flow data.
22. The programmable device of claim 20 ,
wherein intrusion detection system further comprises instructions that when executed by the processor in the operating system environment cause the processor to:
request the second monitor data from the cryptographically secured hardware environment; and
compare the first monitor data with the second monitor data by the intrusion detection system in the operating system environment.
23. The programmable device of claim 20 , wherein the intrusion detection software is configured to cause the process to record network traffic continuously.
24. The programmable device of claim 20 , wherein the programmable device is configured to compare the first monitor data and the second monitor data periodically.