Compromised Server Recovery

Server compromises announce themselves in familiar ways, and none of them improve if you wait.

We begin with a call and immediate access to assess scope: which server, what it does, what data it holds, and what the attacker appears to be doing right now. If the box is actively harming others or exfiltrating data, we move to containment within minutes rather than finishing a leisurely assessment first.

We isolate the server from the network or restrict it to management access only, kill the attacker’s live sessions, and block the command-and-control traffic. Crucially, we take a forensic snapshot before we start changing things, so the evidence of how they got in survives the cleanup.

We remove every persistence mechanism we have mapped: web shells, backdoored binaries, malicious cron and services, rogue accounts and SSH keys. We verify against package integrity and known-good baselines rather than trusting that a file looks normal, because attackers are good at making their tools blend in.

Depending on how deep the compromise went, we either restore the server to a verified clean state or rebuild it from trusted media and migrate only clean data across. We bring services back in a sensible order, confirm the machine is behaving, and watch closely for any attempt to return.

Before we hand the server back, we close the door that let the attacker in and tighten the obvious weaknesses around it, so the recovered machine is meaningfully harder to breach than the one that got hit.

If the compromise is shallow and recent, for example a single web shell dropped through an application flaw with no sign of privilege escalation, a careful clean-in-place backed by forensic verification can return the server safely and quickly.

Once an attacker has root or SYSTEM, or a rootkit is in play, you can never fully trust the running operating system again. In those cases we rebuild from clean media and migrate verified data, which is slower but the only way to be certain no hidden implant survives. We tell you plainly which situation you are in rather than selling you the more expensive option by default.

We reconstruct the intrusion timeline from the preserved evidence. In the server compromises we clean up, the entry point is usually an unpatched application or CMS, a weak or reused SSH password, an exposed admin panel, or a stolen credential, far more often than a novel exploit. We identify yours specifically.

Disk images, memory captures and log exports are hashed, timestamped and stored securely, handled to a standard that holds up for insurers, regulators or legal proceedings. If you may need a formal forensic report, say so at the outset so we collect accordingly from the first minute.

We cut the attack surface: close services that face the internet without needing to, put administration behind a VPN or allow-list, enforce key-based SSH and strong authentication, and remove the stale accounts and forgotten software that so often provide the way in.

We turn on the logging and file-integrity monitoring that would have caught this earlier, and we check that your backups are both working and offline enough to survive a future attack. A backup an attacker can reach and encrypt is not a backup.

Watching the first weeks closely

The riskiest period is right after recovery, when an attacker who has not fully lost interest may probe to see whether their access survived. For that reason we recommend heightened monitoring for the first few weeks, with alerts tuned to the exact techniques we saw on your box. If anything twitches, you hear about it immediately rather than discovering a repeat compromise a month later through the same symptoms all over again.

Where a breach affects personal data, GDPR can require notifying your supervisory authority within 72 hours of becoming aware, and informing affected individuals when the risk to them is high. We help you establish what was actually accessed, which is the fact that decision turns on, and document the reasoning either way so your position is defensible.

The forensic findings feed straight into your breach record and any regulator or insurer questions, so you are answering with facts rather than assumptions. We can join calls with your legal team to make sure the technical picture is represented accurately.

Containment usually begins the same day you call, often within hours. A straightforward clean-and-harden on a single server can complete in a day or two. A full rebuild with forensics and data migration takes longer, typically several working days, and we give you interim updates throughout rather than going quiet until the end.

A hosting provider suspends the account for abuse. Google flags the site as compromised. A monitoring alert shows the CPU pinned at 100 percent overnight with no legitimate cause. Customers report being redirected to somewhere unpleasant. If any of that is happening now, the sooner we start, the less the attacker can do with the time.