Cyber security protection system and related proactive suspicious domain alert system
A cyber security protection system includes a plurality of threat information updating devices; and a proactive suspicious domain alert system, which including: a domain information monitoring device; a domain information storage device; and a security threat analysis device, arranged to operably communicate data with the plurality of threat information updating devices through a network. If the domain information monitoring device detects that a domain mapping of a suspect domain is changed and the new domain mapping of the suspect domain points to a predetermined local address, the domain information monitoring device would further monitor a domain mapping variation frequency of the suspect domain. If the domain mapping variation frequency of the suspect domain exceeds a predetermined value, the security threat analysis device adds the suspect domain into an alert list to render the plurality of threat information updating devices to block their member devices from accessing the suspect domain.
1. A cyber security protection system, comprising:
a plurality of threat information updating devices, arranged to respectively monitor networking behaviors of a plurality of client network systems; and
a proactive suspicious domain alert system, comprising:
a domain information monitoring device, arranged to operably monitor domain mapping variation of a suspect domain, wherein a domain age of the suspect domain is greater than seventy-two hours;
a domain information storage device, coupled with the domain information monitoring device, and arranged to operably store monitoring records generated by the domain information monitoring device; and
a security threat analysis device, coupled with the domain information monitoring device and the domain information storage device, and arranged to operably conduct data transmission with the plurality of threat information updating devices through networks,
wherein if the domain information monitoring device finds out that a domain mapping of the suspect domain is changed, and a new domain mapping of the suspect domain points to a predetermined local address or one of a plurality of predetermined local addresses, then the domain information monitoring device monitors a domain mapping variation frequency of the suspect domain, and
wherein if the domain information monitoring device determines that the domain mapping variation frequency of the suspect domain exceeds a predetermined level, then the security threat analysis device adds the suspect domain into a block list to render the plurality of threat information updating devices to block member devices within the plurality of client network systems from accessing domains in the block list.
2. The cyber security protection system of claim 1 , wherein the domain information monitoring device is further arranged to operably keep monitoring the domain mapping variation of the suspect domain after the suspect domain is added into the block list, and if the domain information monitoring device finds out that the domain mapping of the suspect domain is changed and a new domain mapping of the suspect domain points to a predetermined local address or one of the plurality of predetermined local addresses, then the security threat analysis device removes the suspect domain from the block list, so as to decrease computing loadings and storage requirements for the domain information monitoring device, the security threat analysis device, and the plurality of threat information updating devices.
3. The cyber security protection system of claim 2 , wherein before the suspect domain is added into the block list, if the domain information monitoring device finds out that the domain mapping of the suspect domain is changed, a new domain mapping of the suspect domain does not point to a predetermined local address nor any of the plurality of predetermined local addresses, and the suspect domain is not added into a tracking list by the security threat analysis device, then the domain information monitoring device discards the suspect domain.
4. A proactive suspicious domain alert system for providing a block list to a plurality of threat information updating devices, the plurality of threat information updating devices being respectively utilized to monitor networking behaviors of a plurality of client network systems, the proactive suspicious domain alert system comprising:
a domain information monitoring device, arranged to operably monitor a domain mapping variation of a suspect domain, wherein a domain age of the suspect domain is greater than seventy-two hours;
a domain information storage device, coupled with the domain information monitoring device, and arranged to operably store monitoring records generated by the domain information monitoring device; and
a security threat analysis device, coupled with the domain information monitoring device and the domain information storage device, and arranged to operably conduct data communication with the plurality of the threat information updating devices through networks,
wherein if the domain information monitoring device finds out that a domain mapping of the suspect domain is changed, and a new domain mapping of the suspect domain points to a predetermined local address or one of a plurality of predetermined local addresses, then the domain information monitoring device monitors a domain mapping variation frequency of the suspect domain, and
wherein if the domain information monitoring device determines that the domain mapping variation frequency of the suspect domain exceeds a predetermined level, then the security threat analysis device adds the suspect domain into the block list to render the plurality of threat information updating devices to block member devices within the plurality of client network systems from accessing domains in the block list.
5. The proactive suspicious domain alert system of claim 4 , wherein the domain information monitoring device is further arranged to operably keep monitoring the domain mapping variation of the suspect domain after the suspect domain is added into the block list, and if the domain information monitoring device finds out that the domain mapping of the suspect domain is changed and a new domain mapping of the suspect domain points to a predetermined local address or one of the plurality of predetermined local addresses, then the security threat analysis device removes the suspect domain from the block list, so as to decrease computing loadings and storage requirements for the domain information monitoring device, the security threat analysis device, and the plurality of threat information updating devices.
6. The proactive suspicious domain alert system of claim 5 , wherein before the suspect domain is added into the block list, if the domain information monitoring device finds out that the domain mapping of the suspect domain is changed, a new domain mapping of the suspect domain does not point to a predetermined local address nor any of the plurality of predetermined local addresses, and the suspect domain is not added into a tracking list by the security threat analysis device, then the domain information monitoring device discards the suspect domain.