This weblog is continuation of the earlier weblog on utilizing Cisco Safe Community Analytics. On this half, we cowl leveraging public Cisco Talos blogs and third-party risk intelligence information with Cisco Safe Community Analytics. Be sure you learn the primary half as this half makes references again to Host Group and Customized Safety Occasion directions lined within the unique weblog.
Cisco Talos Blogs
The gifted researchers at Cisco Talos recurrently publish blogs on threats and vulnerabilities. These blogs break down the techniques, methods and procedures (TTPs) utilized by risk actors. Talos’ analysis publications typically embrace pattern supply code, phishing emails, reverse engineering of malicious binaries, instruments, scripts, command and management methodology, attacker infrastructure, file hashes, domains and IP addresses utilized in malicious operations. The indications of compromise (IOCs) are revealed on GitHub as JSON and plain textual content information. We will use these blogs and GitHub information to construct Customized Safety Occasions in Cisco Safe Community Analytics.
Let’s take a look at a weblog: MoonPeak malware from North Korean actors unveils new particulars on attacker infrastructure. This weblog focuses on a state-sponsored group from North Korea. The group leverages an open-source distant entry trojan (RAT) from a household being known as MoonPeak.
Scroll by the article and take note of the extent of element offered. Close to the very backside of the weblog discover the part titled IOCs.
Click on on the hyperlink to the GitHub repository. You can be taken to the Cisco Talos GitHub repository the place you’ll discover the IOCs can be found as JSON and plain textual content information, and are sorted by the month the weblog was revealed in. Be at liberty to discover different information, months, and years to get accustomed to the indications recurrently offered.
Click on on the file “moonpeak-infrastructure-north-korea.txt” or comply with the direct hyperlink. Scroll right down to line 35 of the file the place the Community IOCs start. This checklist comprises twelve IP addresses we’re concerned with. Observed that the IP addresses and domains have been defanged with sq. brackets across the dots so you can not by accident click on on them.
You possibly can both manually delete the sq. brackets or use the discover and exchange performance in your favourite textual content editor to do the job. I choose to make use of Notepad++ when coping with textual content information. I set the “Discover and Substitute” to search for the sq. brackets across the dot and exchange all cases with a dot.
Delete the domains from the checklist and replica and paste these IP addresses right into a New Host Group utilizing the methods described within the first a part of this weblog.
You might also think about using a instrument to extract IP addresses from textual content. I actually like iplocation IP Extractor. You possibly can paste in a block of textual content with IPv4 and IPv6 IP addresses and it’ll extract them to allow them to be simply reviewed and pasted into a bunch group. The IPs you paste into this instrument can’t be defanged. It requires full and proper IP addresses to work.
All the time think about the sensitivity of the knowledge you present to public instruments earlier than utilizing them. You must think about a regionally hosted instrument for delicate data
Third-party risk intelligence
In the event you take part in any Data Sharing and Evaluation Facilities (ISACs), subscribe to industrial feeds or recurrently make the most of bulletins and blogs geared in the direction of your business, you can even make the most of their indicators in Cisco Safe Community Analytics. They work the identical method we dealt with inside risk intelligence within the first a part of this weblog or Cisco Talos blogs proven above. Watch out when scraping risk intelligence to make certain you might be solely together with indicators you propose to make use of. For instance, in case you are scraping a complete bulletin that comprises IP addresses you have an interest in, be sure you don’t by accident copy an IP tackle from an adjoining and unrelated entry.
You possibly can paste a block of IP addresses right into a New Host Group or use a instrument to drag them out of a block of textual content after which paste them. Watch out in case your supply defangs IP addresses, as this is quite common. You need to use the identical methods I illustrated for the Cisco Talos GitHub entries above.
Host group mother or father/youngster relationships
An excellent apply for constructing mother or father and youngster host teams is to create a brand new mother or father host group for any distinct sources. Then create a toddler host group for every new report. This lets you simply monitor again each to the unique supply or the risk intelligence and establish which marketing campaign or risk actor is concerned. I like to incorporate a hyperlink to the supply within the host group description. That is particularly useful in case you are using a number of risk intelligence sources to your safety controls. Arrange your host teams in a fashion that makes essentially the most sense to you.
You possibly can both create a brand new Customized Safety Occasion (see the primary a part of this weblog) for every youngster host group with a definite identify or create one Customized Safety Occasion for the mother or father host group with a generic identify. Both case may have you lined, and the host group identify within the alarm will allow you to shortly establish the supply of risk intelligence.
Different Concerns
You at all times need to carry out a Circulate Search (Examine -> Circulate Search) first earlier than constructing any Customized Safety Occasions. It will forestall you from flooding your self with alerts in the event you by accident embrace the incorrect IP tackle or are already recurrently speaking with an IP tackle you propose to incorporate in a brand new host group.
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