D盾

D盾 is a Lightweight SECurity utility built for administrators who run Microsoft IIS web servers and want a strAIghtforward way to guard against tampering and hidden backdoor scripts. It focuses on two prACTical jobs: filtering traffic to IIS and hunting for webshells, the small malicious scripts attackers often plant on compromised sites. The tool is aimed at Chinese-speaking Windows operators, and its interface and documentation may be localized accordingly.

What it does

At its core, D盾 inspects the files and behavior associated with an IIS site and flags content that looks like a webshell. Webshells are commonly written in ASP or PHP-style server scripting and are used to execute commands, upload files, or steal data after an intrusion. D盾 also works as a kind of firewall layer in front of IIS, aiming to block hostile requests before they reach the APPlication. The exact detection rules and interception behavior may vary between builds, so administrators should validate results on their own systems.

Key capabilities

• Webshell scanning: searches site directories for suspicious script patterns commonly used by backdoors.
• IIS firewall: provIDEs request filtering intended to reduce exposure to known attack signatures.
• File inspection: helps surface recently modified or oddly named scripts that may indicate an intrusion.
• Windows-friendly Operation: designed to run alongside IIS rather than replacing it.
• Simple footprint: a small utility that can be used for periodic checks rather than a full security suite.

Who it is for

D盾 suits system administrators, small hosting operators, and web developers responsible for Windows IIS environments who want a quick second opinion on whether a site has been compromised. It is less suited to teams looking for Enterprise-grade endpoint protection with centralized dashboards, automated remediation, or cross-platform coveRAGe. Organizations with compliance requirements should treat it as an aUXiliary tool and combine it with mature security controls.

How to get started

1. Visit the vendor site to obtain the current distribution and confirm supported Windows and IIS veRSIons.
2. Run the tool with administrative privileges on the server that hosts the site you want to inspect.
3. Point the scanner at the site's web root and review any flagged files before deleting or quarantining them.
4. Enable the firewall component only after Testing, since overly strict rules can block legitimate traffic.
5. Re-scan on a regular schedule and keep an offline baseline of expected files for Comparison.

Pricing and access caveat

D盾 has historically been distributed as a free utility, but licensing, supported versions, and update terms may change and should be confirmed on the vendor's official page before relying on it. There is no guarantee of ongoing maintenance, and detection accuracy is not independently certified. Because the tool interacts deeply with server files and IIS configuration, test it in a stAGIng environment first and back up site content before acting on its findings.