🤖 Overview

01h4x.com is a web crawler operated by an independent cybersecurity research group that uses the domain 01h4x.com as its identifier. Its primary purpose is to conduct automated vulnerability assessments and reconnaissance of publicly accessible web applications, collecting data about security misconfigurations, exposed endpoints, and potential weaknesses. The crawler feeds its findings into a private vulnerability database and may contribute to responsible disclosure programs, bug bounty platforms, or security research publications. This bot is not affiliated with any commercial product but operates as a legitimate security research tool, documented in several online forums and security community discussions.

🌐 Technical Behavior

The 01h4x.com crawler employs a systematic scanning approach, sending HTTP/HTTPS requests with User-Agent strings containing the 01h4x.com domain. It typically performs directory brute-forcing, parameter fuzzing, and endpoint discovery, often targeting common web application paths like /admin, /api, and /config. Request frequency varies but can be aggressive, with intervals as short as 100–500 milliseconds per request, though some deployments apply jitter to reduce detection. The bot uses IPv4 addresses from a range of residential and cloud IPs, including those from VPS providers such as DigitalOcean and Linode, according to community reports. It primarily interacts with web servers over plain HTTP and HTTPS, rarely using other protocols.

📋 robots.txt Compliance

Based on documented evidence from security blog posts and server log analysis, the 01h4x.com crawler generally respects robots.txt Disallow directives when they are clearly defined. However, some reports indicate that it may ignore rules if the crawler is configured to prioritize thoroughness over compliance, particularly during in-depth vulnerability scans. The bot's operator has stated in forum posts that they encourage site owners to explicitly block the User-Agent in robots.txt if they do not wish to be scanned.

🔍 Detection Indicators

The primary detection indicator is the User-Agent string, which typically contains "01h4x.com" or "01h4x" as part of the identifier, e.g., "Mozilla/5.0 (compatible; 01h4x.com/1.0; +https://01h4x.com)". Additional behavioral fingerprints include rapid-fire requests to non-existent paths and a high ratio of 404 responses. Some deployed instances also send a custom X-01h4x-Scan header, as observed in community logs.

📊 Data Usage

The collected data is used to build a catalog of web application vulnerabilities, including open ports, exposed configuration files, and common security issues like directory traversal and SQL injection points. The findings are analyzed to generate reports that may be shared with website administrators through automated emails or submitted to bug bounty platforms such as HackerOne and Bugcrowd. The bot also contributes to aggregated statistical research on internet-wide security hygiene.

⚙️ Rate Limiting Policy

Rate limiting is applied to 01h4x.com because its aggressive crawl patterns can place significant load on web servers, potentially degrading performance for legitimate users. The policy rationale is to enforce threshold-based blocking (e.g., exceeding 50 requests per minute from a single IP) to prevent resource exhaustion while still allowing the bot to conduct its security assessments at a manageable pace.

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the bots listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.