Platform
Security & Compliance Automation Platform
UnderDefense MAXI is the solution to day-to-day cybersecurity problems of IT leaders and teams. It builds your 24/7 business protection together with you on the driver’s seat.
UnderDefense MAXI Platform
UnderDefense Secures Top Honor at the 2025 Global Infosec Awards
We’re proud of being a winner at the 2025 Global Infosec Awards…
Our AI
10-Point AWS Security Checklist for Executives
Quickly assess your cloud security posture with this executive-ready checklist covering IAM, monitoring, and compliance essentials.
Anti-Phishing Playbook
Your free PDF guide to spotting and stopping phishing attacks before they reach your team or data.
Services
24/7 Threat Detection & MAXImum Responsiveness
Our human-led MDR service combines expert insight and automation and AI for fast, precise threat response. Get full context in 2 minutes and cut MTTC to 15, staying ahead of ransomware and other attacks.
Calculate your MDR price
Pay only for the services you actually need, with no hidden costs.
Solutions
10-Point AWS Security Checklist for Executives
Quickly assess your cloud security posture with this executive-ready checklist covering IAM, monitoring, and compliance essentials.
Anti-Phishing Playbook
Your free PDF guide to spotting and stopping phishing attacks before they reach your team or data.
Company
Spot threats faster and respond smarter than tools alone
24/7 MDR and SOC services led by award-winning security experts. We act as an extension to your team or as a fully remote team, providing detailed threat insights and actionable responses to secure your environment immediately.
UnderDefense is an AWS Partner
We’re excited to announce that UnderDefense is now an AWS partner and available on AWS Marketplace…
Resources
Managed SOC at Your Service
Augment your SOC with 24/7 monitoring, threat detection, and expert response—without the overhead. Integrated with your existing tools, our SOCaaS stops attacks before they cause harm.
Managed SIEM Pricing Guide
Download a clear, practical overview of Managed SIEM pricing, featuring detailed breakdowns by service type, pricing model, real-world pros and cons, and key cost factors.
Partners
Managed SOC at Your Service
Augment your SOC with 24/7 monitoring, threat detection, and expert response—without the overhead. Integrated with your existing tools, our SOCaaS stops attacks before they cause harm.
Managed SIEM Pricing Guide
Download a clear, practical overview of Managed SIEM pricing, featuring detailed breakdowns by service type, pricing model, real-world pros and cons, and key cost factors.
Cyberlok/Cyber Volk ransomware recovery team on standby
Cyberlok, also marketed as Cyber Volk, is an emerging ransomware group active in 2024–2025, selling a ransomware-as-a-service kit on dark-web forums and targeting organisations with weak RDP and VPN configurations. Isolate affected systems immediately and contact UnderDefense's incident response team — do not attempt containment or negotiation alone.
Average Mttc
Ransom-Free recovery rate
Avoided in ransom
Global availability
Systems restored
IR experts
Ransomware cases resolved
IR experience
Do NOT attempt any self-remediation, as it can trigger further encryption and destroy recovery points. Instead, follow these steps:
Contact us now for urgent ransomware response assistance, 24/7
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Accomplishments and recognitions, demonstrating our commitment to excellence and innovation.
Momentum Leader in MDR
Best Support in MDR & IR
Managed Detection and Response (MDR)
Top Cybersecurity Company 2025
Best Managed Detection and Response Service
#4 of 184 teams Splunk Boss of the SOC
Best Of Cybersecurity Awards for Q1 2025
AWS Partner
Splunk Manage Premier Partner
Like a crime scene, a ransomware attack must be preserved — tampering with encrypted files, attempting self-recovery, or engaging with attackers can destroy critical evidence and reduce your chances of recovery.
Taking the right steps in the first moments after a Cyberlok/Cyber Volk attack can make a huge difference and help you make a full recovery. Request 24/7 Cyberlok/Cyber Volk ransomware recovery services to decrypt your data and maximize your chances of restoring operations.
Cyberlok infections display .cyberlok or .volk file extensions and ransom notes named CYBER_NOTICE.txt or VOLK_RECOVERY.txt. Initial compromise traces to phishing, credential theft, and application exploitation. Standard ransomware: AES-256 encryption and data exfiltration.
AES-256-CBC with RSA-2048 wrapping.
RaaS with affiliate recruitment and partnerships. Operators maintain infrastructure; affiliates source targets.
Dual extortion: encryption plus data publication. Standard leak site, victim names, data samples, deadline.
Windows-primary targeting.
CYBER_NOTICE.txt or VOLK_RECOVERY.txt with contact information.
No decryption tool available.
File Extensions
.cyberlok, .volk, .cyb_locked
Ransom Note Filenames
CYBER_NOTICE.txt, VOLK_RECOVERY.txt, CYBERLOK_README.txt
Cyberlok Hashes
Limited samples. Process names: cyberlok.exe, volk.exe.
Cyberlok Tools
– EDR Disabling: Windows Defender disable
– Credential Dumping: Mimikatz, registry extraction
– Reconnaissance: Network enumeration
– Exfiltration: Rclone, FTP, cloud storage
– Lateral Movement: Pass-the-Hash, SMB
– Malware: Standard delivery trojans, backdoors
Most Common Red Flag
PowerShell execution, Rclone sync operations, service creation, unusual persistence mechanisms.
Attack vector | % of Cyberlok incidents | Notes |
Phishing | 50% | Credential stealer delivery |
RDP Brute Force | 35% | Weak credentials |
Unpatched Apps | 15% | RCE vulnerabilities |
3–7 documented victims. Ransom demands: $35K–$600K. Payment rate: 20–30%.
Eliminate attacker access: revoke credentials, remove persistence, scan backdoors, restore from backups.
Recovery depends on backup strategy. Organizations with 3-2-1 backups recover in 1–7 days.
Documented demands: $35,000–$600,000. Average settlement: $100,000–$250,000.
10 reasons why you should choose the UnderDefense ransomware recovery consulting services:
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Cyberlok (marketed as Cyber Volk) is an emerging RaaS operation (2024–2025) using AES-256-CBC encryption. The dual naming convention suggests either rebranding, partnership, or marketing variation. Standard dual-extortion tactics.
Multiple “Cyberlok” variants exist in threat landscape. Attribution between them unclear; may be unrelated operators or single group using multiple names.
Diverse enterprise sectors. No specialization documented. Victims span finance, manufacturing, healthcare. Opportunistic targeting.
No public decryption tool exists.
Data publication on leak site within 7–10 days.
1) Email security with sandboxing; 2) Patch applications immediately; 3) MFA on all access; 4) EDR deployment; 5) Offline backups; 6) Regular security audits.
1) Isolate systems immediately; 2) Revoke all credentials; 3) Scan for backdoors and persistence; 4) Preserve forensic evidence; 5) Notify law enforcement (FBI); 6) Verify backup integrity; 7) Begin recovery from clean backups; 8) Monitor for re-compromise; 9) Post-incident, audit access logs and implement enhanced monitoring.
Multiple naming conventions serve operational purposes: 1) Brand confusion (complicate law enforcement tracking), 2) Market segmentation (different affiliate networks use different names), 3) Rebranding for OPSEC, 4) Partnership/affiliate visibility (Cyber Volk vs. Cyberlok).
Cyberlok represents lower risk than established operations (Cuba, Everest) but equivalent to contemporaries (D0Glun, GD LockerSec). Standard RaaS methodology with emerging operational maturity.
