Since 28 August we have detect some increasing Web Proxy CONNECT Request from China. All the source IPs are different and most of these source IPs are only trying one or two connections.
Here under a live graph on the “Web Proxy Connect Request”. An Afterglow visualization, all datas (timestamps, source IPs, source IPs countries, source IPs ASN) are available by clicking on the following link.
We have detect some increasing Web Proxy CONNECT Request from Russia. Majority of the source IPs are from 188.8.131.52/13 CORBINA-BROADBAND. As you can see in the yearly events graph, we have around 7 more time scans events than previous months. Also the monthly TOP 10 source IPs graph show us that all the IPs are coming from the same range located in Russia.
Most of time these trends are given by Firewall reporting, but an IDS how is configured to report activities on non used TCP, or UDP, ports, could also trigger alerts. If you use the Emerging Threats “Known Compromised Hosts” and “Recommended Block List“, correlation between Firewall activities and IDS signatures will give you a better overview on the attacker.
Emerging Threats SIG 2008187 create an alert if the user agent “Paros” is detected in destination of HTTP, or HTTPS, variables definitions. Each time, the user agent is detected an alert will be triggered. The sum of alert, from the same source, to the same destination, during an interval of time will give you the number of content how have been proxied by Paros.
Paros Proxy is used, normally, to evaluate to security of Web applications. All HTTP and HTTPS datas between server and client, including cookies and form fields are intercepted and could be modified. If you detect these kind of activities, you should add the attacker IP address to an “Aggressive Attacker” list for furthers trends and correlations.