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. Make sure you learn the primary half as this half makes references again to Host Group and Customized Safety Occasion directions coated within the authentic weblog.
Cisco Talos Blogs
The proficient researchers at Cisco Talos recurrently publish blogs on threats and vulnerabilities. These blogs break down the techniques, strategies and procedures (TTPs) utilized by risk actors. Talos’ analysis publications usually 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 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 referred to as MoonPeak.
Scroll via 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 may be taken to the Cisco Talos GitHub repository the place you will 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 conversant in the symptoms recurrently supplied.
Click on on the file “moonpeak-infrastructure-north-korea.txt” or comply with the direct hyperlink. Scroll all the way down to line 35 of the file the place the Community IOCs start. This checklist incorporates twelve IP addresses we’re interested by. 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’ll be able to both manually delete the sq. brackets or use the discover and exchange performance in your favourite textual content editor to do the job. I want 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 situations with a dot.
Delete the domains from the checklist and replica and paste these IP addresses right into a New Host Group utilizing the strategies described within the first a part of this weblog.
You may additionally think about using a software to extract IP addresses from textual content. I actually like iplocation IP Extractor. You’ll be able to 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 software can’t be defanged. It requires full and proper IP addresses to work.
All the time contemplate the sensitivity of the knowledge you present to public instruments earlier than utilizing them. It is best to contemplate a regionally hosted software for delicate data
Third-party risk intelligence
For those who take part in any Data Sharing and Evaluation Facilities (ISACs), subscribe to business feeds or recurrently make the most of bulletins and blogs geared in the direction of your business, you may also 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 sure you’re solely together with indicators you plan 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 tackle from an adjoining and unrelated entry.
You’ll be able to paste a block of IP addresses right into a New Host Group or use a software to tug 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 should utilize the identical strategies I illustrated for the Cisco Talos GitHub entries above.
Host group father or mother/youngster relationships
A very good 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 in your safety controls. Set up your host teams in a way that makes probably the most sense to you.
You’ll be able to 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 may have you coated, and the host group identify within the alarm will aid you rapidly establish the supply of risk intelligence.
Different Concerns
You at all times need to carry out a Movement Search (Examine -> Movement Search) first earlier than constructing any Customized Safety Occasions. This can stop you from flooding your self with alerts if you happen to by chance embody the flawed IP tackle or are already recurrently speaking with an IP tackle you plan to incorporate in a brand new host group.
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