Enterprise Franchise Platform
Zero Downtime 500+ Branches
Neutralized multi-tenant privilege escalation and SQL injection flaws across 500+ franchise branches, guaranteeing zero downtime and complete data isolation.
Web Vulnerability
Remediation Service!
From PHP web shells to Node.js exploits, we isolate compromised servers, strip out malicious payloads, and patch security holes without disrupting your production workflow.
Automated malware scanners and hosting auto-reinstallers only treat symptoms. If the root code vulnerability is not patched, the backdoor re-infects your stack within 48 hours.
When an attacker compromises a server, they leave behind covert persistence mechanisms: obfuscated PHP scripts hidden inside legitimate upload directories, compromised npm dependencies triggering remote code execution, rogue cron jobs executing curl backdoors, and forged admin accounts in your database.
Zatnum's engineering unit combines static AST analysis, filesystem forensics, and live log auditing to surgically purge malicious artifacts while keeping your core application alive. We identify the exact entry flaw, write the surgical code patch, and wrap your environment in hardened WAF rules so you never face blacklisting or data theft again.
24–48h SLA Response
Rapid containment for active breaches and live malware outbreaks.
Zero Downtime Target
Surgical hot-patching keeps your customers purchasing uninterrupted.
100% Code Integrity
Full snapshot rollback safety with zero database or customer record loss.
Forensic Audit Proof
Root-cause incident documentation and blacklist de-listing support.
Common Exploits We Neutralize
Surgical eradication and backend hardening across modern and legacy technology stacks.
PHP & Legacy Backdoors.
Detection and elimination of obfuscated web shells (c99, r57, wso, eval-based injectors), vulnerable file-upload bypasses, unauthorized cron tasks, and tampered CMS core files. We audit server-side MIME verification and seal execution rights in media upload paths.
Node.js & Modern Stack Exploits.
Neutralizing prototype pollution, malicious or vulnerable npm dependencies, insecure deserialization, and Remote Code Execution (RCE) vectors. We refactor insecure child_process/eval calls and enforce strict schema-based input sanitization.
Database & Auth Exploits.
Mitigating blind and union-based SQL injection (SQLi), JWT token forgery loops, unvalidated redirect chains, and unauthorized privilege escalation. We migrate queries to parameterized statements and re-sign authentication secrets.
Server-Level Persistence.
Identifying hidden SSH authorized_keys, unauthorized sudo users, rogue systemd daemons, crypto-miner background tasks, and misconfigured Nginx or Apache reverse proxies allowing path traversal (..;/).
Known Vulnerability & CVE Remediation Directory.
Targeted technical resolution for php2shell exploits, node2shell vulnerabilities, and critical CVEs.
CVE-2024-4577 • PHP2SHELL CRITICAL 9.8
PHP CGI Argument Injection to Web Shell Drop.
Attackers exploit Windows and Apache mod_cgi argument escapes in PHP to execute arbitrary commands and deposit obfuscated c99, r57, and WSO web shells in writable upload folders.
Remediation Patch
Patching runtime binaries to PHP 8.1.29 / 8.2.20 / 8.3.8, rewriting FastCGI query dispatch rules, and sealing upload directories with deny all execution blocks.
CVE-2021-23337 • NODE2SHELL HIGH 8.8
Lodash Prototype Pollution to Remote Command Execution.
Insecure deep-merge and recursive copy routines allow attackers to pollute Object.prototype, hijacking internal Node.js child_process templates to spawn unauthorized reverse shells.
Remediation Patch
Pinned lockfile audit, freezing Object.prototype via Object.freeze, and implementing Zod strict object validation schemas to reject prototype keys.
CVE-2023-37466 • RCE ESCAPE CRITICAL 9.8
Node.js Sandbox Escape & Host Process Takeover.
Flaws in sandbox libraries like vm2 allow untrusted code executed in host applications to break out of sandboxed contexts and trigger system-level child_process.exec() shells.
Remediation Patch
Migrating isolated code compilation to dedicated containerized microservices and V8 isolated contexts with strict syscall seccomp filters.
CVE-2023-3824 • BUFFER OVERFLOW CRITICAL 9.8
PHP Memory Corruption & Arbitrary Code Execution.
Buffer overflow flaws in phar and XML processing pipelines can be triggered by crafted file uploads, allowing attackers to hijack memory registers and execute shellcode.
Remediation Patch
Immediate upstream binary patch, disabling phar.readonly=On, and disabling high-risk functions (exec, system, passthru, proc_open) in php.ini.
CVE-2024-21892 • PATH TRAVERSAL HIGH 8.5
Node.js Permission Model Bypass & Process Spawning.
Path traversal flaws in experimental permission model implementations allow malicious inputs to bypass --allow-fs-read and trigger unauthorized file modifications and script execution.
Remediation Patch
Upgrading Node.js to LTS 20.11.1 / 21.6.2, enforcing OS-level user namespaces, and revoking unnecessary file write capabilities for the application user.
MALWARE CLEANUP • WEBSHELL ACTIVE THREAT
Polymorphic Base64 & Gzinflate Backdoors.
Concealed web shells disguised as legitimate cache or thumbnail files (e.g. cache_temp.php, .php%00.jpg) utilizing dynamic string evaluation to execute commands and dump databases.
Remediation Patch
Full recursive AST filesystem hashing against clean upstream releases, quarantine of unauthorized files, and Cloudflare WAF OWASP Core Rule Set deployment.
Our 4-Step Remediation Process.
Methodical execution, zero data loss, and bulletproof long-term security.
01
Isolation & Forensics
Immediate snapshot of server state, log preservation, and containment of active outbound command-and-control connections.
- Immutable server & DB snapshot
- RAM & live process inspection
- Access log & IP trace forensics
- Outbound socket containment
02
Malware Eradication
Deep recursive filesystem and database scan to strip out webshells, base64 payloads, and unauthorized modifications.
- AST signature & heuristic scan
- Database string & serialized cleanup
- Rogue cron & daemon elimination
- Official checksum diff validation
03
Core Hardening & Patching
Patch the exact underlying vulnerability (input validation, dependency updates, sanitization, strict MIME checks) so reinfection is impossible.
- Root code flaw remediation
- Vulnerable package lock updates
- Strict input validation schemas
- Parameterized query enforcement
04
Environment Lockdown
Lock down file permissions, configure Web Application Firewalls (WAF), enforce strict headers (CSP, HSTS), and deploy integrity monitoring.
- File permission audit (644/755)
- Cloudflare/AWS WAF rule tuning
- CSP, HSTS & X-Frame enforcement
- Automated filesystem integrity alerts
Claim Your Free 15-Minute Security Audit Call.
Speak directly with a senior backend security engineer. We will review your symptoms, assess exposure, and outline an emergency remediation plan.
Zero Obligation • 100% Confidential
What We Cover in Your Free 15-Min Audit
Whether your website is actively blacklisted by Google, your hosting account is suspended, or you suspect unauthorized server activity, we will triage the situation on a live video bridge.
Incident Severity & Exposure TriageRapid evaluation of active symptoms (web shells, spam links, CPU spikes, or blacklisting).
Stack & Dependency Risk ReviewIdentification of vulnerable PHP plugins, Node.js packages, or unpatched framework versions.
Zero-Data-Loss Containment PlanStep-by-step strategy to isolate malicious processes without disrupting customer orders or site uptime.
Root-Cause Hardening BlueprintClear action items for permanent code patching, WAF rules, and hosting suspension resolution.
Security & Hardening Case Studies.
Explore how Zatnum isolates vulnerabilities, modernizes legacy code, and protects production systems.
ATECH LMS Platform
100% Uploads Sealed Cloudflare WAF
Eradicated legacy unauthenticated file-upload vectors, refactored media storage execution rights, and deployed Cloudflare Enterprise WAF to thwart scrapers.
Autonomo Ecosystem
Node.js LTS Hardened Zero Token Leak
Hardened Node.js microservices against prototype pollution and JWT replay attacks, structuring secure session validation and end-to-end API rate-limiting.
Frequently Asked Questions.
Everything you need to know about our web remediation protocols.
How do you fix a php2shell or PHP web shell vulnerability?
Fixing a php2shell exploit requires deep recursive AST filesystem scanning to strip obfuscated base64 and eval loaders, eliminating rogue upload bypasses, patching root flaws like CVE-2024-4577, and sealing file execution permissions in upload directories.
How do you remediate a node2shell or Node.js RCE vulnerability?
For node2shell exploits, we audit the dependency tree, patch prototype pollution flaws like CVE-2021-23337, sandbox child_process and vm2 execution (CVE-2023-37466), and enforce strict runtime input validation schemas.
Will our production database and client data be preserved during malware cleanup?
Yes, 100%. Before modifying any code or database records, we generate an immutable server snapshot. We sanitize files using AST parsing and surgical code diffing, guaranteeing zero accidental data loss or customer record corruption.
How quickly can your team isolate a live exploit or active PHP web shell?
For active compromises, our team initiates emergency triage rapidly. We deploy firewall containment rules and terminate rogue processes to sever outbound command-and-control communication without taking your business completely offline.
Do you help remove Google Safe Browsing blacklists and hosting suspensions?
Absolutely. Once the site is 100% sanitized and hardened, we submit formal review appeals with forensic logs to Google Search Console, CleanTalk, Norton, and your web hosting provider (AWS, DigitalOcean, cPanel, Cloudways) to restore your search rankings and domain reputation swiftly.
How do you prevent attackers from returning through another backdoor?
We fix the root cause, not just the symptom. We eliminate the initial vulnerability that granted entry, rotate all database and system credentials, seal upload permissions, disable code execution in media folders, and deploy Web Application Firewall rules with automated integrity alarms.
