IR-003 • Anonymized recovery report
Recurring Backdoor Infection
Malware returned after previous cleanup by another developer.
Business impact
Malware returned after previous cleanup by another developer.
Symptoms observed
- Same infection returned after a few days
- Suspicious PHP files appeared again
- Unknown scheduled behavior
Investigation
The investigation focused on confirming active compromise, mapping the infection scope and identifying whether the incident was caused by vulnerable software, compromised access, injected database content or persistent backdoor code.
Root cause
A hidden backdoor and unclosed entry point were missed during the previous cleanup.
Recovery actions
- Searched for persistence mechanisms
- Reviewed wp-content, uploads, mu-plugins and cron events
- Removed hidden PHP backdoor
- Rotated credentials and reviewed users
- Closed the likely vulnerable entry point
Hardening
After cleanup, the site should be hardened around the root cause: update or replace vulnerable components, rotate credentials, remove unnecessary administrators, review file permissions and add monitoring for recurring indicators.
Outcome
The site was recovered with the reinfection mechanism removed and documented.
FAQ
Is this a real client name?
No. Reports are anonymized to protect client privacy. The structure reflects real-world recovery scenarios and common incident patterns.
Can WP•FIX provide a similar report?
Yes. Business recovery cases can include a clear summary of symptoms, findings, recovery actions, likely root cause and hardening recommendations.
Why is root cause important?
Without root-cause work, malware can return through the same backdoor, vulnerable plugin, compromised account or hosting-level access path.
Need a recovery report for your incident?
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