Steps to take if you suspect ransomware

Ransomware attacks can strike without warning, locking files, disrupting business processes, and putting sensitive data at risk of theft or exposure. 

If you are reading this because you have just experienced a ransomware incident and are unsure how to deal with ransomware, stop now and contact Zensec immediately. Our rapid cyber incident response teams are available 24/7 to contain infected systems, protect your critical assets, and start the recovery process.

For those looking to prepare or understand the threat more deeply, this guide explains what ransomware is, the immediate steps to take, and how Zensec can help you respond and recover. Our mission is to bring calm and clarity when your organisation needs it most.

The growing threat of a ransomware attack

During a live cyber security incident, unusual network traffic can be a key sign of compromise. The pressure to respond is intense when critical systems are down, operations are stalled, and customers or partners are affected. Acting quickly and following the right steps is essential to limit damage and start the ransomware recovery process.

Businesses today rely heavily on digital computer systems, operating systems, remote access, and core network connections to operate efficiently. Unfortunately, this creates opportunities for malicious actors who exploit known vulnerabilities, weak security measures, or unsecured user accounts to gain access.

Once inside, they deploy malicious software designed to lock down your critical systems, steal sensitive data, or exfiltrate relevant files detected on your network. Running regular antivirus scans on your operating system can help detect malware early, but increasingly, attackers also threaten to leak data publicly if ransom payments aren’t made.

Spotting the signs of ransomware

Different malicious actors use different techniques – from phishing emails to exploiting remote desktop protocol or selling access through ransomware as a service. But the warning signs are often similar:

• • A sudden wave of phishing emails

• • Unusual network traffic or alerts for suspicious registry entries

• • Antivirus scans flagging malicious software

• • Strange or renamed files, or encrypted files with unfamiliar extensions

• • A ransom note appearing on screen

• • Slowdowns or crashes across infected systems

If you notice these, raise it with colleagues and your IT department immediately.

What to do first

1. Disconnect affected devices

Unplug infected computers, disable remote access, and block suspicious IP addresses. This prevents malicious code spreading further.

2. Shut down everything else

Power off other computer systems, close core network connections, and stop Wi-Fi. Keeping a clean network is essential for containment.

3. Notify your IT team

Your IT or managed service provider should begin your incident response plan — reviewing relevant logs, identifying known vulnerabilities, and locking down user accounts and privileged accounts.

4. Pause backups

Stop auto-syncs immediately to protect offline backups, backup files, and your system image from being encrypted.

5. Call in the experts

Bring in a cyber incident response team. Specialists can investigate data exfiltration, cut off suspected command and control IP addresses, and guide the recovery process with the right decryption tools and security measures.

Zensec’s cyber security and ransomware recovery approach

At Zensec, our incident response and forensic teams deal with ransomware daily. We focus on fast containment, thorough clean-up, and safe system recovery. Our process includes:

Assessment – Understand the breach, locate infected devices, and identify vulnerabilities that could affect business processes.

Analysis – Examine relevant files detected, other relevant files, and relevant logs to check for data theft or data publicly released.

Containment – Quarantine affected devices, stop malware spread, and block access where needed.

Remediation – Remove the malicious software, patch known vulnerabilities, safely wipe compromised systems, and reset credentials.

Recovery – Restore from offline backups, reimage infected systems, and run antivirus scans to ensure the network is clean and protected against future attacks.

Reporting – Provide a clear breakdown, including steps taken and recommendations for further advice.

Building resilience for the future

Recovery is only half the battle. Zensec helps organisations strengthen their defences so they don’t fall victim again. This includes:

• • Regular antivirus scans and monitoring of suspicious registry entries

• • Strong authentication for user accounts and privileged accounts

• • A tested backup solution with offline backups

• • Network segmentation to protect critical systems

• • Policies to reset credentials and control IP addresses

• • Multi factor authentication across the board

• • Ongoing cyber security training to stop threats like phishing emails before they succeed

Get further advice today

If you suspect ransomware, don’t wait. Every minute counts. Zensec’s nationwide teams provide same-day, on-site support, backed by 24/7 monitoring and proven cyber incident response expertise.

Call us now or use our contact form for immediate ransomware help.