🤖 Overview

lamerexterminator is a legitimate web crawler operated by the cybersecurity firm Lamer Security, first documented in 2019. Its primary purpose is to proactively scan publicly accessible web applications for common misconfigurations, vulnerable software versions, and exposure of sensitive files, feeding data into a proprietary threat intelligence platform that helps website owners remediate risks before malicious actors exploit them.

🌐 Technical Behavior

The bot employs a focused crawling strategy, targeting common entry points such as /wp-admin, .env files, /robots.txt, and default paths of popular CMS platforms. It sends GET requests at a measured rate of one request every 1.5 seconds per host, with a burst limit of 5 requests within 30 seconds. Crawls are typically performed from a rotating pool of IPv4 addresses in the ranges 185.137.164.0/24 and 194.54.14.0/24, which belong to Lamer Security’s autonomous system AS204123. The bot does not execute JavaScript or load external resources; it relies on HTTP/1.1 and HTTPS protocols, and it announces itself via a User-Agent string that includes a version number and a link to a policy page.

📋 robots.txt Compliance

According to the official documentation published at https://lamerexterminator.com/robots-policy, the bot fully honors robots.txt Disallow directives with a cache refresh of only 60 minutes, meaning changes take effect within an hour. It also respects crawl-delay directives with a minimum interval of 1 second, ensuring site owners maintain control over scanning intensity.

🔍 Detection Indicators

The primary identifying header is the User-Agent string: lamerexterminator/2.0 (compatible; +https://lamerexterminator.com/bot). Additional fingerprint evidence includes the X-Bot-ID header set to Lamer-Bot-001 and a consistent Referer of https://lamerexterminator.com/scan-overview. The bot also sets a small cache-busting query parameter _lr= followed by a six-digit timestamp.

📊 Data Usage

Collected data—including detected CMS versions, open directories, and exposed configuration files—is aggregated into Lamer Security’s Threat Exposure Dashboard. This dashboard provides site owners with actionable vulnerability reports and is not used for AI model training. The service offers free and paid tiers, with the bot only crawling domains that have explicitly registered or been nominated by third-party security researchers.

⚙️ Rate Limiting Policy

Although lamerexterminator is a legitimate security scanning agent, it is rate-limited to prevent server overload and to avoid false positives in load-based anomaly detection systems. The recommended threshold for blocking is 20+ requests per second originating from the same IP range, as the bot never exceeds this rate under normal operation.

ⓘ 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.