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What are the criteria for determining positive, negative, and false positives? [Falcomi Meetup Report]

Introduction

Hello everyone! Macnica runs "Falcomi," a community where CrowdStrike users gather.
This time, we will be bringing you a report on the user event "Falcomi Meetup Vol.2," which was held in Tokyo (Shinagawa) on February 6, 2026.
The venue was filled with excitement as participants exchanged real-life concerns and know-how about on-site operations!
The theme of Meetup Vol.2 was "What are the criteria for determining positive, negative, and false positives?"
In this article, we will introduce what happened on the day and what we learned!

Introduction

lightning talk

Each participant was given three minutes to introduce themselves, their areas of expertise, and what they are currently concerned about.

Future Secure Wave's Initiatives

The information was quite specific and not available anywhere else, and it provided a lot of learning and hints for future initiatives for both the attendees and the secretariat members.

Table Talk

In the second half, participants were divided into tables of four and used sticky notes and whiteboards to hold discussions on the themes of "1) Understanding the current situation," "2) Recent troublesome cases," and "3) The gap between ideals and reality."

  • The importance of speedy recovery from false isolation
  • Concerns over whether to implement Falcon Complete
  • Variation in alert volume
  • Lack of education and specialists
  • High expectations for AI and automation

Real-world issues and operational know-how were shared, such as:

The reality of correct detection, false detection, and overdetection

We have summarized the key points that impressed the Secretariat during your heated discussions.

<Point 1> Be aware of on-site operational trade-offs

For critical infrastructure and mission-critical servers, automatic isolation and blocking settings pose a risk of disrupting business operations.
It's important not to be too on the safe side and to balance preventing accidental isolation with speedy recovery!
Since there may be frequent instances of incorrect isolation in the early stages of implementation, it is important to verbalize operational tips and internal coordination procedures!

<Point 2> When responding to alerts, prioritize quality over quantity and clarify your criteria

The most practical way to use CrowdStrike alerts is to check not only the severity but also the "content and behavior."
Medium also has important detections, so there are cases where you have no choice but to look at the whole thing.
Optimize your operations by using policies, exclusion settings, grouping, and more to suit your site!

<Point 3> "Education and knowledge sharing" is the shortcut to labor saving

It is essential to train analysts and SOC staff, and to systematize and document their know-how! We have reaffirmed the importance of establishing a flow for distinguishing between ML and IOA detections, as well as operational training.

<Point 4> Expectations for improved operational efficiency through AI and automation

New AI services such as Charlotte AI and operational efficiency improvements through API integration (FalconPy, RTR, etc.) are attracting attention.
There are high expectations for the introduction of AI SOC and automation to address issues such as limitations on human resources and night-time response.

What is Falcomi? & Preview of upcoming events!

What is Falcomi?

Falcomi is a community exclusively for companies that have introduced CrowdStrike Falcon. Macnica was created as a place where users can use Falcon more efficiently and effectively through the exchange of information and sharing of operational know-how that is unique to users.

<Characteristics of Falcomi>

  • You can feel free to ask any questions you have.
    For example, users can solve everyday questions such as "How do other companies do this setting?" or "What should I do when this kind of alert appears?"
  • Plenty of community-only events
    We regularly plan study sessions and seminars for community members, such as the Meetup held this time, and "FalconTech," where participants learn how to use Falcon in a CTF format.
  • There is also a wealth of content for beginners, such as how to set up the system immediately after installation.
    After installing Falcon, we have prepared videos and documents to resolve any initial configuration questions you may have, allowing you to get off to a hassle-free start.

<Next event announcement!>

The event is scheduled to continue in FY2026. We will let you know as soon as the application site opens, so please make sure to save your spot!

  • June: Falcomi Meetup Vol.3
    Please see this article for details on Vol.1.
  • October: FalconTech
    Check out this article for last year's event.

The greatest appeal of Falcomi is that it allows user companies to exchange real-world operational knowledge and tips with each other. You'll find colleagues you can immediately consult with about any questions you have, and opportunities for in-depth learning at events. If you're interested in using Falcon more or learning about other companies' cases, why not join Falcomi?

*Limited to CrowdStrike user companies and companies purchasing through Macnica.
*If you are not sure whether you purchased from Macnica, please apply first (^^)/

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