: Use a security scanner like Wordfence or Sucuri to check for other compromised files or backdoors.
: It is designed to mass-send emails, often bypassing standard server restrictions to facilitate phishing or malware proliferation. ninjamailer.php
: Legitimate tools used for improving email deliverability or verifying email lists . Recommended Actions : Use a security scanner like Wordfence or
: Many security scanners will identify files with this name as unwanted or malicious scripts due to their use in unauthorized email campaigns. Distinction from Legitimate "Ninja" Plugins Recommended Actions : Many security scanners will identify
: It is frequently flagged as a "mailer" used by threat groups (such as those involved in "Operation Armor Piercer") to automate the delivery of maldocs and archives.
: Check your server logs to see when the file was uploaded and from what IP address.