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. You should definitely learn the primary half as this half makes references again to Host Group and Customized Safety Occasion directions coated within the unique weblog.
Cisco Talos Blogs
The gifted researchers at Cisco Talos commonly publish blogs on threats and vulnerabilities. These blogs break down the ways, methods and procedures (TTPs) utilized by risk actors. Talos’ analysis publications typically embody 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 recordsdata. We are able to use these blogs and GitHub recordsdata 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 referred to as MoonPeak.
Scroll by means of the article and take note of the extent of element supplied. Close to the very backside of the weblog discover the part titled IOCs.
Click on on the hyperlink to the GitHub repository. You’ll be taken to the Cisco Talos GitHub repository the place you can find the IOCs can be found as JSON and plain textual content recordsdata, and are sorted by the month the weblog was revealed in. Be at liberty to discover different recordsdata, months, and years to get aware of the symptoms commonly supplied.
Click on on the file “moonpeak-infrastructure-north-korea.txt” or observe the direct hyperlink. Scroll all the way down to line 35 of the file the place the Community IOCs start. This listing incorporates twelve IP addresses we’re focused on. Seen that the IP addresses and domains have been defanged with sq. brackets across the dots so you can not by chance click on on them.
You possibly can both manually delete the sq. brackets or use the discover and change performance in your favourite textual content editor to do the job. I favor to make use of Notepad++ when coping with textual content recordsdata. I set the “Discover and Substitute” to search for the sq. brackets across the dot and change all situations with a dot.
Delete the domains from the listing and duplicate 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 device 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 device can’t be defanged. It requires full and proper IP addresses to work.
At all times take into account the sensitivity of the knowledge you present to public instruments earlier than utilizing them. It is best to take into account a domestically hosted device for delicate data
Third-party risk intelligence
In the event you take part in any Data Sharing and Evaluation Facilities (ISACs), subscribe to business feeds or commonly make the most of bulletins and blogs geared in the direction of your trade, you can too make the most of their indicators in Cisco Safe Community Analytics. They work the identical means we dealt with inner 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 whole bulletin that incorporates IP addresses you have an interest in, be sure to don’t by chance copy an IP handle from an adjoining and unrelated entry.
You possibly can paste a block of IP addresses right into a New Host Group or use a device 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 father or mother/youngster relationships
A superb observe for constructing father or mother and youngster host teams is to create a brand new father or mother host group for any distinct sources. Then create a baby host group for every new report. This lets you simply observe 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 on your safety controls. Set up your host teams in a fashion that makes probably 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 father or mother host group with a generic identify. Both case can have you coated, and the host group identify within the alarm will show you how to shortly establish the supply of risk intelligence.
Different Concerns
You all the time need to carry out a Stream Search (Examine -> Stream Search) first earlier than constructing any Customized Safety Occasions. This may stop you from flooding your self with alerts in case you by chance embody the incorrect IP handle or are already commonly speaking with an IP handle you propose to incorporate in a brand new host group.
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