WordPress Backdoor Rebuilds Itself After Cleanup Using Files, Database, and Shared Memory

Cybersecurity researchers have uncovered a sophisticated WordPress backdoor dubbed 'SC' (named after 'SC_' markers in injected content) that employs multiple persistence mechanisms to survive cleanup attempts. The malware, analyzed by Sucuri, has been described as a 'self-healing mesh' capable of rebuilding itself after removal. It leverages a combination of file-based, database-level, and shared memory persistence techniques to ensure the payload continues operating even after remediation efforts. This multi-layered approach makes it particularly difficult to fully eradicate from compromised WordPress installations. The backdoor represents an advanced threat to WordPress site owners and administrators, as standard cleanup procedures are insufficient to remove it completely.