Incident Response
Something happened. Now what?
There is a moment when it stops being a suspicion and becomes an incident: files encrypted, an account clearly not being used by its owner, a supplier calling about an invoice nobody sent. Arctic Wolf Incident Response exists for that moment, to contain what is spreading, work out what actually occurred, and get the business running again.
Incident response is not IT support performed faster
A serious intrusion is a legal, regulatory, and commercial event as much as a technical one. It requires evidence handling, disclosure decisions with real deadlines, and the discipline not to destroy the record while trying to fix the problem. Very few internal teams have done it before, and the first time should not be during your own breach.
The clock is regulatory, not technical
Disclosure obligations and insurer notification windows start running immediately, and they do not pause while you work out whether it is serious.
Instinct destroys evidence
Rebuilding the affected machine immediately feels like decisive action. It also removes the only record of how the intruder got in and what else they reached.
Restoring too early invites them back
If the original route in is still open, a rebuilt environment gets compromised again within days, often before anyone has finished celebrating.
What actually happens, in order
The order matters more than the speed. Containment before investigation, investigation before restoration, and eradication before anyone declares it finished.
Triage and containment
Establish scope quickly and stop the spread. Isolating affected systems while preserving what they contain is the first priority, because everything else gets harder if the intruder is still moving.
Evidence preservation
Forensic images and logs captured before anything is rebuilt. This is the step most often skipped under pressure and the one that cannot be recovered later.
Establish what happened
How they got in, how long they were present, which systems they touched, and whether data was accessed or taken. These are the questions your insurer, your regulator, and your customers will all ask.
Remove access completely
Closing the original route in, removing persistence mechanisms, and resetting compromised credentials. Partial eradication is the most common cause of a second incident.
Return to operating
Bringing systems back in a controlled order with monitoring in place, and a clear account of what was done for the people who need it.
Experienced responders who have seen this before
The advantage of a team that does this continuously is pattern recognition. Most intrusions follow recognizable routes, and knowing which ones saves hours at the point where hours matter most.
The first hours decide the cost
How quickly an intrusion is contained largely determines how much it eventually costs, in downtime, in data, and in disclosure. Response that begins in hours rather than days is the single biggest lever on the final figure.
Forensic investigation
Establishing the full account: entry point, dwell time, lateral movement, and what data was actually reached. Guessing at any of those turns into a disclosure problem later.
Containment and eradication
Stopping the spread, then removing every route back in including the persistence mechanisms most teams do not know to look for.
Business restoration
Getting operations running again in a controlled order, which is a different objective from making the network technically clean.
Documentation and reporting
A defensible written record of what happened and what was done, which is what insurers, regulators, and enterprise customers require afterwards.
Common incident types
Ransomware, business email compromise, and account takeover are the recurring patterns, each with a known shape and a known set of things to check.
The four things people do that make it worse
All of these are understandable reactions. All of them cost time, evidence, or negotiating position.
Rebuilding the affected machine immediately
It feels like progress and it destroys the evidence needed to establish scope, which you will then have to establish by assumption instead.
Turning everything off at once
Powering down can destroy memory-resident evidence and may not stop an intruder who already has persistence elsewhere. Isolation is not the same as shutdown.
Communicating on the compromised system
If email or chat is affected, discussing the response there tells the intruder exactly what you are about to do.
Waiting to see if it resolves
Dwell time is the variable that drives cost. Hours spent hoping it is nothing are hours the intruder spends spreading.
When this is the right thing to reach for
Call for incident response if
- Files have been encrypted or a ransom demand has appeared
- An account is clearly being used by someone other than its owner
- Money has been sent to an account you now believe was fraudulent
- You have found unexplained access, tooling, or persistence on a system
- A supplier or customer has told you something suspicious came from you
- You need to establish whether data was taken, with evidence behind the answer
Something else fits better if
- Nothing has happened yet and you want coverage arranged in advance, which is a retainer
- You want ongoing monitoring so incidents are caught earlier, which is MDR
- You want to reduce how often this happens, which is exposure management and awareness training
- It is a routine IT fault with no sign of an intruder
During an incident, knowing the environment is worth hours
Responders arriving cold spend their first hours learning your environment: what is normal, what that server does, who should have access to it, which systems the business cannot operate without. That is time spent while an intrusion is live, and it is the clearest argument for having a provider who already knows the answers.
Arctic Wolf brings the response capability
Experienced responders, forensic investigation, containment and eradication, and the documentation that has to stand up to an insurer or a regulator afterwards.
NYN Impact brings the context and the recovery
They know your systems, your people, and what the business actually needs restored first. They are also who you will be working with long after the responders have finished.
- Answering environment questions immediately instead of after discovery
- Deciding restoration order around what the business genuinely needs first
- Performing the rebuild and recovery work itself
- Closing the weaknesses the investigation identifies, so it does not recur
- Coordinating with your insurer and, where needed, legal counsel
- Being a single point of contact while everything else is chaotic
For the moment it is no longer hypothetical
Arctic Wolf Incident Response provides experienced responders for an active security incident: triage and containment first, evidence preserved before anything is rebuilt, forensic investigation to establish how they got in and what they reached, complete eradication of access, then controlled restoration of the business. The written record produced is what insurers, regulators, and customers will require afterwards.
Get in touch with NYN Impact
Questions about this solution? Reach us directly.