Immediate Action Plan in case of a malware attack on the site or the site is compromised

1. A backdoor is present (via a rogue file, shell, or malicious cronjob),

2. File permissions are too loose, or

3. The attacker has elevated privileges, possibly even root access or PHP shell access.

🔥 Immediate Action Plan

1. ✅ Check for Suspicious Cron Jobs

List system-wide and user crons:

Look for unexpected scripts or obfuscated commands (e.g., base64, curl/wget, PHP files being executed).

2. ✅ Tighten File & Directory Permissions

WordPress permissions best practice:

🔐 Plugins like Wordfence should not be writable by the web server (except for logs and cache dirs).

3. ✅ Look for Common Backdoors

Run a quick scan:

Look especially in:

• /wp-content/uploads/

• /wp-includes/

• /wp-admin/

• /vendor/

• /tmp/ or /dev/shm/

4. ✅ Reinstall Wordfence and Core Files

Reinstall from fresh source (not backup):

And reinstall WordPress core:

⚠️ This won’t affect your content but removes any tampered core files.

5. ✅ Block File Modifications via wp-config.php

Add this to wp-config.php:

Only do this once your site is clean, as it disables web-based plugin/theme edits.

6. ✅ Enable Immutable Flag (Advanced but Powerful)

After cleanup, lock files using Linux chattr (on ext4 filesystems):

This makes files immutable, even for root, unless chattr -i is run manually.

7. ✅ Audit Recent Logins and File Changes

Check recent logins:

Check recent file modifications:

You may also try:

8. ✅ Recommended Tools to Scan

• Wordfence CLI Scan

• maldet (Linux Malware Detect)

• rkhunter

• chkrootkit

• ClamAV

❗ Last Resort: Full Wipe and Rebuild

If you:

• Found modifications in multiple system areas,

• Suspect rootkits or privilege escalation,

• Can’t clean files with confidence,

🔒 Backup only content and DB, and do a fresh OS + WordPress install.

🔐 Immediate Steps:

1. Put site in maintenance mode. Temporarily prevent front-end access to stop further damage while we fix.

2. Reset all access:

   • Change all FTP/SFTP/SSH passwords.

   • Regenerate WordPress salts in wp-config.php using this generator.

   • Delete and recreate all WordPress admin users with strong passwords.

3. Disable file modifications: Add the following to wp-config.php:

   define('DISALLOW_FILE_MODS', true);
define('DISALLOW_FILE_EDIT', true);


🛠️ Set Up Automated Monitoring (Custom Cron + File Integrity):

Let’s create a custom PHP script that:

• Scans files for changes.

• Sends alerts.

• Restores clean versions if tampered.

Would you like help generating this script?

🔎 Line-by-Line Malware Analysis:

Would you like to upload a few of the infected files so I can help review and clean them manually?

Also, do you have a clean backup (even if outdated)? That would help with comparing file integrity.

Let me know how you’d like to proceed, and we’ll secure this step by step.