This PHP web shell is a variant of the Indonesian Mildnet PHP web shell. This shell offers basic functionality for executing commands and uploading files to the targeted server. A remote attacker could upload/download this PHP shell to a victim’s system via a vulnerability or misused functionality. When the shell has been placed on the system, the attacker can execute commands via a simple web interface.
- A remote attacker exploits a vulnerability/functionality in a targeted web server to upload the Mildnet variation web shell.
- The server responds successfully indicating that the shell has been uploaded.
- The attacker executes a command on the targeted system via the web shell.
The attacker must be able to inject the malicious code onto the web server through another vulnerability or exploit.
Alert Logic Coverage
Alert Logic® has evaluated its customer base for exposure to the exploit and has developed signatures for mitigating the threat depending on the security service in place.
The Network-Based Intrusion Detection System (IDS) has been updated with the new signatures for this exploit when detected via Alert Logic Threat Manager™. If this signature is detected, an incident is generated in the Alert Logic console.
Recommendations for Mitigation
The attacker must have exploited some other entry vector to allow the malicious files to become resident on the victim machine.