For a lot of teams, tracking indicators and notes in a spreadsheet, then feeding them manually into detection and prevention systems, works well for months or even years. You can start small, learn what intelligence is actually useful to your organisation, and build a repeatable process before investing time in more complex tooling.
As your program grows, you'll eventually want to do things that get harder in a flat table: track relationships between indicators, keep confidence scores current as new evidence comes in, preserve source history, and pivot quickly between related objects like file hashes, domains, TTPs, threat actor profiles and sightings across multiple feeds.
None of that is impossible in a spreadsheet. It just gets slower and more fragile as volume and complexity grow.
For most teams reaching that point, we recommend MISP as the next step. It gives you more structure, correlation, automation and sharing capability without requiring you to build an overly complex CTI environment from day one.
Why a spreadsheet is a good place to start
You don't need an expensive platform or a large collection of commercial feeds to start doing useful threat intelligence.
A spreadsheet, a few trusted sources and some dedicated analyst time can be enough to establish the foundations of a CTI program. At this stage, the most important work is understanding what intelligence your organisation actually needs and how it will be used.
Your Priority Intelligence Requirements (PIRs) are useful here: the specific questions your stakeholders need answered to make a decision. They help you collect intel with purpose rather than accumulating indicators simply because they're available.
Starting with simple tooling also gives you room to work out your processes. What do you collect? How do you decide what's relevant? How do you assess confidence? Who uses the intelligence, and what do they do with it?
Those processes remain important as you mature. Moving to MISP won't replace analyst judgement or good intelligence practice. It gives you a better way to support them once maintaining everything manually becomes difficult.
Signs you've outgrown the spreadsheet
Threat intelligence isn't naturally flat. Indicators relate to malware, infrastructure, campaigns, threat actors and techniques. Sources need to stay attached to the information they produced. Assessments change as new evidence arrives. The same infrastructure may appear across different investigations months apart.
As those relationships accumulate, analysts can end up spending more time manually updating the spreadsheet and less time operationalising the intelligence they collect.
Some common signs you’re hitting the limits of a spreadsheet:
- Relationships are getting harder to track. You can record a domain, hash or IP address in a row, but showing how it connects to malware, a campaign, a threat actor or another event requires increasingly elaborate workarounds.
- Traceability is becoming difficult. It becomes unclear where information came from, what changed, when it changed and why an analyst made a particular assessment.
- Duplicate records are creeping in. Different feeds and analysts may describe the same infrastructure in different ways, creating inconsistent naming and duplicated work.
- Context is getting separated from the indicator. Confidence ratings, attribution rationale, source reliability and historical sightings are becoming harder to keep attached to the right record.
- Manual handling is affecting data quality. Copying, formatting, tagging and updating information by hand creates opportunities for inconsistency.
- Collaboration is becoming awkward. Multiple analysts editing the same files can introduce version conflicts, duplicated effort and uncertainty about which record is current.
- Operationalising intelligence takes too long. Analysts may spend significant time manually exporting intelligence from the spreadsheet into SIEM, SOAR, detection or prevention tooling.
These are all signs that your program has grown past what a flat table can comfortably support. At that point, it's worth moving to tooling designed specifically for threat intelligence.
Why we recommend MISP for most teams
MISP is one of the most established open-source platforms for collecting, structuring, correlating and sharing threat intelligence.
It provides a central place to keep indicators, context, source information, sightings, tags and relationships together. It can also automate parts of ingestion, enrichment, correlation and sharing, reducing the amount of manual handling analysts need to do.
For most teams moving beyond spreadsheets, that addresses the immediate problems without requiring a complete redesign of how they work.
Keep intelligence and its context together
Instead of treating an IP address, file hash or domain as an isolated value in a row, MISP lets you structure intelligence through events, attributes and objects, and relate it to malware families, threat actors, tools, ATT&CK techniques and other relevant context.
That makes it easier for analysts to understand why an indicator matters and to pivot through related information during an investigation.
It also makes historical intelligence more useful. Infrastructure seen in a new event can be correlated with information you've collected previously, helping analysts surface repeated infrastructure and connections that are difficult to find manually.
Improve traceability and consistency
As more analysts and sources contribute intelligence, consistent structure becomes increasingly important.
MISP can keep source information, tags, sightings, assessments and other context attached to the intelligence itself. Your team can work from the same underlying information rather than maintaining separate spreadsheet versions or trying to reconstruct how an assessment was made.
This becomes particularly useful as your analysis gets more sophisticated.
As your process matures, you may start recording things like source reliability, confidence and why an analyst reached a particular assessment. You can do all of this in a spreadsheet, including using frameworks such as the Admiralty System, and for a small program that may be entirely sufficient.
The difficulty comes as the volume of intelligence, number of sources and number of analysts grow. What starts as a few well-understood columns can turn into conventions that need to be applied consistently across multiple tabs, records and contributors.
MISP lets you apply these assessments using structured taxonomies and keep them attached to the events and attributes they describe. That makes it easier to apply the same approach consistently and preserve the assessment alongside the underlying intelligence as it is updated, correlated or shared.
The Admiralty Scale is one way to do this. It separates the reliability of the source from the credibility of the information itself, giving analysts a repeatable way to record those judgements. MISP includes an Admiralty Scale taxonomy, so these assessments can be applied as structured tags rather than recorded in free-text notes or custom spreadsheet columns. The taxonomy includes separate values for source reliability and information credibility, helping teams apply the same assessment framework consistently across events and attributes.
You don't need to use Admiralty ratings specifically to use MISP effectively. The important part is having a consistent approach to source reliability, credibility and confidence, and keeping those assessments connected to the intelligence rather than scattered across analyst notes.
Make collaboration and sharing easier
MISP allows multiple analysts to work from a shared intelligence base while maintaining consistent structure and context as more people contribute.
That becomes increasingly valuable as CTI stops being the work of one analyst maintaining a file and starts supporting SOC analysts, incident responders, detection engineers and other security teams.
MISP also has strong intelligence-sharing capabilities. You can control how information is distributed, synchronise with other MISP communities and participate in broader sharing ecosystems when that's appropriate for your organisation.
For teams that expect sharing to become part of their CTI maturity journey, this is one of MISP's stronger advantages.
Reduce repetitive manual work
A spreadsheet often relies on analysts to do a surprising amount of data movement by hand.
MISP enables automation across ingestion, enrichment, tagging, correlation and sharing. When integrated with your SIEM, SOAR and other security tooling, that automation can extend into detection and response workflows as well.
Even with this automation, however, analysts still need to decide what's relevant, assess ambiguous information and understand how intelligence applies to your environment.
The benefit is reducing repetitive work so analyst time can go towards those higher-value decisions.
Scale without overcomplicating the program
One reason we recommend MISP for most teams is that it can support a fairly natural progression from a simpler CTI process.
You don't need to introduce every feed, enrichment module, integration or sharing workflow at once. You can start with the parts that solve the problems you're already experiencing, then expand as your requirements mature.
That makes it easier to improve incrementally rather than trying to design a complete future-state CTI environment from the beginning.
MISP still depends on good CTI practice
Moving to MISP works best when you already understand what you're trying to achieve.
Your PIRs and operational use cases should still drive collection. Your analysts still need a consistent way to evaluate sources and confidence. And you still need to know who consumes the intelligence and what decisions or actions it supports.
MISP gives those processes somewhere more structured to live.
If you're struggling with unclear requirements or collecting intelligence that nobody uses, moving the same process into MISP won't automatically fix it.
If the process is useful but maintaining it manually has become the constraint, that's a much stronger sign that you're ready for purpose-built tooling.
What changes when you make the move?
For teams who’ve outgrown a spreadsheet, moving to MISP typically results in faster triage, fewer false positives, better detection coverage, better-supported investigations, and decisions made with better context.
For most teams, the progression can be quite simple:
- Start with the problem you're trying to solve. Define your PIRs and operational use cases.
- Use simple tooling while it works. A spreadsheet is often enough to establish the process and prove its value.
- Watch for growing maintenance overhead. Relationships, traceability, collaboration and manual integrations are usually the first pressure points.
- Move to MISP when those problems start limiting the programme. For most teams, it provides a practical step up in structure, automation and sharing.
- Start with the capabilities you actually need. You don't need to implement every possible feed, integration or workflow on day one.
- Keep analysts at the centre. Use the platform to support their judgement and reduce repetitive work rather than treating tooling as a substitute for analysis.
You don't need to jump straight from a spreadsheet to a large, complex intelligence capability. The useful next step is the one that solves the constraints you actually have.
How Cosive helps with MISP
Cosive works extensively with MISP and contributes to the MISP community. For most teams that have outgrown spreadsheet-based CTI, it's the platform we recommend.
We can set up a cloud-hosted MISP deployment, hardened and configured for your environment, then help with feed integration, enrichment module configuration and SIEM/SOAR connectors so MISP becomes part of your working security process rather than another standalone platform.
We also help teams work through the process around the platform: what intelligence matters, how it should be structured, which workflows are worth automating and how MISP should connect to the rest of the security environment.
If your spreadsheets are starting to creak, we're happy to talk through whether MISP is the right next step and what a sensible deployment would look like for your team.
