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Purple team: fix the detection while you watch it fail

A red team tells you what was missed. A purple team fixes it in the room. We run a technique, your defenders go looking for it in their own tooling, and if nothing fires we work out together why - log source missing, rule too narrow, alert going to a queue nobody reads - and then try again. It is less dramatic than a red team and it improves detection faster than anything else we sell.

we run itthey look for it the middle one never fired

ENGAGEMENT SCOPEtypical 3 - 5 days

Agreed ATT&CK techniquesIN SCOPE
Your SIEM and EDR, side by sideIN SCOPE
Rule writing and tuningIN SCOPE
Before and after evidence per techniqueIN SCOPE
Your analysts in the roomIN SCOPE
Covert operationOPTIONAL
// the basics

When this is the right engagement

If your last red team ended with "you did not see any of it", the next engagement should probably be this one rather than another red team. You already know the answer. What you need now is the work of closing the gaps, done with somebody who knows what the attack looks like from the other side.

It also suits an organization that has just bought tooling. A SIEM or an EDR out of the box detects what the vendor thought was important, not what reaches your environment. A few days of running real techniques against it is worth more than months of tuning in the dark.

  • 01Nothing is hiddenYour team knows exactly what we are about to run, because the point is the looking, not the hiding.
  • 02Measured per techniqueEach one is detected, logged, or missed, and the result is written down before we move on.
  • 03Rules written in the sessionNot recommended for later. Written, tested against a repeat of the technique, and left working.
  • 04Mapped to ATT&CKSo the coverage you end with is expressed in the same language as your threat intelligence.
// coverage

What we run, and what we look for together

Techniques are chosen from MITRE ATT&CK against what actually threatens your sector, not from a generic list.

// credentials

Credential access

Where detection most often has a hole.

  • Kerberoasting and AS-REP roasting
  • LSASS access and dumping
  • Password spraying at a realistic rate
  • Token theft and impersonation
// movement

Lateral movement

The noisiest thing an attacker does, and the most often missed.

  • Remote service execution
  • WMI and WinRM use
  • SMB and admin share activity
  • Pass-the-hash and pass-the-ticket
// staying

Persistence

What survives a reboot, and whether anything notices.

  • Scheduled tasks and services
  • Registry and startup locations
  • Account creation and group changes
  • Cloud and identity persistence
// hiding

Defence evasion

Where modern tooling is supposed to earn its licence fee.

  • Process injection and hollowing
  • Script obfuscation and in-memory execution
  • Clearing and tampering with logs
  • Disabling or blinding agents
// taking

Collection and exfiltration

The last chance to catch it.

  • Staging data on a host
  • Archive and compression activity
  • Transfer over common and uncommon channels
  • Volume and timing anomalies
// afterwards

What you keep

The output is working rules, not a document.

  • Detection matrix by technique
  • Rules written, tested and left in place
  • Log sources you are missing, named
  • A repeatable script for next quarter
// methodology

How the work runs

  1. 1

    Pick the techniques

    From what actually threatens your sector and what your tooling claims to cover.

    • Threat profile for your industry
    • Current tooling and log sources
    • A shortlist agreed with your team
    • Success defined per technique
  2. 2

    Run, and look

    One technique at a time, with both sides watching.

    • We execute and timestamp
    • Your analysts hunt in their own console
    • Detected, logged or missed is recorded
    • No moving on until it is written down
  3. 3

    Work out why

    A miss is the useful part of the day.

    • Was the log source there at all?
    • Did the rule exist and not match?
    • Did it alert into an unwatched queue?
    • Was it detected and not escalated?
  4. 4

    Fix it now

    Rules written and tested in the session, not listed for later.

    • New or widened detection rules
    • Log sources turned on and verified
    • Alert routing corrected
    • The technique re-run to prove the fix
  5. 5

    Hand over

    A matrix you can re-run yourselves next quarter.

    • Technique-by-technique before and after
    • Every rule, with its logic
    • Gaps that need budget rather than tuning
    • A script to repeat the exercise
// the deliverable

What you are left holding

Two documents and a conversation. Written so the person who signs the invoice and the person who writes the fix can both use them.

  • Executive summary in plain language, with the business risk first
  • Technical findings with the evidence that proves each one
  • CVSS score and a risk rating that reflects your business, not a template
  • Remediation written for the stack you actually run
  • A free retest, and a closure summary you can hand to a customer
  • A debrief call with the tester who did the work, not an account manager
Ask for a sample report
// the standards

Measured against something

The work follows MITRE ATT&CK, Atomic Red Team and NIST SP 800-115, so the coverage can be checked rather than taken on trust, and the report maps to what your auditor or your enterprise customer already recognises.

This page is one part of our red teaming service. Where a finding needs a different kind of engagement to answer properly, we say so in the report rather than selling you the test we happen to be running.

// faq

Common questions

How is this different from a red team?

A red team hides and measures whether you notice. A purple team tells you exactly what is coming and measures whether you can see it, then fixes what you cannot. One produces a verdict; the other produces working detection.

Do we need a SOC for this to be worth it?

You need somebody who looks at security logs, whether that is a SOC, an MSSP or one engineer with a SIEM. If nobody looks at the logs, the detection gaps are not the problem worth spending on first.

What do we actually get at the end?

A matrix of every technique we ran against whether it was detected, logged or missed, the rules we wrote during the session, the log sources you are missing by name, and a script so you can run the same exercise again in six months without us.

Can our MSSP take part?

Yes, and it is usually revealing. An exercise where your provider has to hunt in real time, in front of you, answers a question about that contract which is very hard to answer any other way.

Is this a substitute for a penetration test?

No. It measures detection, not exposure. You still need something that tells you what is exploitable, which is what a penetration test is for.

// start here

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