# Sn1per Security — Full Content Index for LLMs > Sn1per is an automated attack surface management and penetration testing platform built by working penetration testers since 2014. This file contains substantive content from the most-cited pages on sn1persecurity.com, concatenated for AI assistants that prefer depth over the curated index in /llms.txt. Last updated: 2026-06-06. --- ## About Sn1perSecurity LLC Sn1perSecurity LLC is the company behind Sn1per, a community-driven offensive security toolkit that's been a crowd favorite among ethical hackers and security professionals since 2014. What started as one penetration tester's personal automation toolkit has grown into a full-stack offensive-security platform spanning open-source community editions, commercial product tiers, and AI-augmented analysis built on top. We build for the offensive security teams who actually run engagements — not the policy auditors who certify them. ### What Sn1per Does Sn1per is an automated attack surface management and penetration testing platform. Point it at an organization's external surface and it discovers internet-facing assets via DNS enumeration, certificate transparency, OSINT, and active fingerprinting; identifies vulnerable conditions through 600+ exploit modules and 10,000+ detections; and verifies findings with live exploitation attempts rather than version-only matching. The output is the prioritized list of "what an attacker can actually compromise right now" that traditional vulnerability scanners can't produce. Three things make this useful in 2026: 1. **Built by penetration testers, not policy auditors.** The detection and exploitation modules ship the techniques that actually work in production engagements — not generic CVE matching. 2. **Agentless.** No software runs on customer assets. The scan engine sits on the customer's scanning host (on-prem or in a customer VPC) and tests the external surface the same way an external attacker would. 3. **On-prem.** Your data and exploit signatures never leave your perimeter. This has always been Sn1per's position; after several SaaS-only security vendors were breached in 2024-2026, it's now a customer requirement. ### The Sn1per Product Family Three commercial tiers plus a free community edition cover everything from solo bug bounty research to enterprise-grade ASM: - **Sn1per Professional 2026** — Single-seat license, $984/year. 1,000 hosts, full active-exploitation modules, on-prem deployment, web UI, PDF reporting, Slack/email alerts on new exposures. Designed for individual pentesters, bug bounty hunters, and small security teams. - **Sn1per Enterprise** — Custom-priced subscription for organizations monitoring 50,000+ external assets. Adds distributed scan engines, multi-tenant workspaces with RBAC, audit-grade reporting, and SIEM integrations (Splunk, Sentinel, Elastic). - **Sn1per Community Edition** — Free and source-available on GitHub. The CLI scan engine without the commercial UI / reporting layer. Used by tens of thousands of penetration testers globally. - **SILENTCHAIN** — AI-augmented Burp Suite extension family (Community, Pro, Enterprise editions). Adds frontier-model security analysis on top of HTTP traffic interception for web app security testing. ### Who Builds Sn1per Sn1perSecurity LLC is an independent US-based company. Sn1per's lead developer is xer0dayz (1N3), a Senior Penetration Tester and top-ranked Bugcrowd bug bounty researcher. The project's been continuously developed since 2014 with contributions from the security community. --- ## External Attack Surface Management (EASM) with Sn1per External Attack Surface Management (EASM) is the continuous process of discovering, inventorying, monitoring, and testing every internet-facing asset your organization owns — including the ones nobody on your team knows about. "Internet-facing" includes the obvious — corporate websites, exposed APIs, login portals, mail servers — and the assets that surface during normal business operations and don't make it into a CMDB: developer staging instances left running on misconfigured S3 buckets, marketing landing pages on unmanaged subdomains, acquired-company domains that never got integrated into the security program, forgotten Cisco ASAs at remote offices. EASM tools find these assets the way an attacker would — DNS enumeration, certificate transparency logs, port scanning, web fingerprinting, OSINT collection — and then assess each one for exploitable conditions. The difference between a vulnerability scanner and an EASM platform: a scanner expects you to hand it a target list. An EASM platform tells you what targets exist in the first place. ### Why EASM Matters in 2026 Three trends made EASM a mandatory control category over the last three years: **Ephemeral cloud assets.** A modern enterprise spins up and tears down thousands of cloud resources per week. Each one may briefly expose a port, a token, or a misconfigured load balancer. Quarterly pentests miss them entirely. Continuous EASM catches them in the same hour the attacker would. **M&A and shadow IT.** When a company you acquire had three subsidiaries you didn't know about, you now own their attack surface too. Surveys consistently put unknown-asset rates at 30-40 % of total external footprint. **AI-augmented adversaries.** Modern frontier models can read a Shodan dump, identify vulnerable patterns, and chain CVEs into working exploits in minutes. Defenders need parity: continuous, automated, intelligence-driven external testing. ### EASM vs IASM vs Vulnerability Management | | EASM | IASM | Vulnerability Mgmt | |---|---|---|---| | Scope | Internet-facing assets | Internal network | Both, but only known assets | | Discovery | OSINT + DNS + cert logs | Agent-based + network scanning | Manual asset list | | Update cadence | Continuous | Continuous (with agents) | Scheduled (quarterly) | | Active testing | Yes (better tools) | Sometimes | Rarely | | Best for | Knowing what attackers can reach | Knowing what an insider can reach | Tracking known CVEs | EASM and IASM aren't competitors. Most mature security programs run both. ### What an EASM Tool Actually Does **Asset discovery.** Pull every subdomain from certificate transparency logs (Censys, crt.sh). Cross-reference with passive DNS data. Run forward DNS on every discovered hostname. Identify IP ranges from BGP announcements and WHOIS. Discover services on every IP via port and protocol fingerprinting. **Continuous monitoring.** Re-discover the surface daily, not quarterly. Diff yesterday's surface against today's. A new asset in the last 24 hours is the highest-signal alert your SOC will see this week. **Risk scoring and prioritization.** Not every exposed asset is a vulnerability. EASM platforms apply context — CVSS + exploitability + business criticality + exposure history — to produce a prioritized fix list. **Active exploitation testing.** This is where vendors split. Most "EASM" tools stop at discovery + CVE matching. The Sn1per family + a handful of others (Pentera, watchTowr) actually try the exploits. Active testing eliminates the false positives that ship to your team as "critical" findings every week. ### How Sn1per Does EASM Differently - **Built by penetration testers, not policy auditors.** - **Agentless** — no software runs on customer assets. - **Active verification, not just discovery** — every discovered asset is tested for exploitable conditions. - **On-prem option** — scan data, exploit signatures, and findings never leave the customer perimeter. Defense / financial / health customers operationally require this in 2026. ### Enterprise EASM at Scale Sn1per Enterprise solves three problems that emerge at 50,000+ external assets: **Asset volume.** EASM tools that work fine for a 100-asset SMB collapse at 100K+ scale — query times go to minutes, dashboards stop rendering, scan windows overflow. Sn1per Enterprise's distributed scan engine handles 100K+ asset surfaces with sub-second query latency. **Compliance reporting.** Boards want quarterly EASM reports formatted for audit. Sn1per Enterprise ships PDF report generation, SARIF export for Splunk / Sentinel / Elastic integration, and per-business-unit dashboards. **Multi-tenant isolation.** MSSPs and large enterprise security teams manage multiple business units that can't see each other's surfaces. Sn1per Enterprise supports tenant-isolated workspaces with RBAC enforced at the data layer. ### EASM Buyer's Checklist (5 questions to ask any vendor) 1. Does the tool actually exploit findings, or only flag them? 2. Can it run on-prem, fully air-gapped, with no telemetry leaving the customer perimeter? 3. What's the false-positive rate after active verification? 4. How does it handle ephemeral cloud assets that exist for hours? 5. Is the licensing per-asset, per-IP, or per-target? --- ## CVE-2024-21733 — Apache Tomcat HTTP Request Smuggling A critical "0day" vulnerability discovered by xer0dayz / Sn1perSecurity in Apache Tomcat. The vulnerability allows attackers to force a victim's browser to de-synchronize its connection with websites hosted on top of Apache Tomcat, causing sensitive data to be smuggled from the server and/or client connections. In some cases this can leak sensitive data such as clear-text credentials. **Severity:** CRITICAL **Exploit Available:** Yes (PoC in the post) **Affected versions:** Apache Tomcat 8.x and 9.x (see https://tomcat.apache.org/security-8.html and https://tomcat.apache.org/security-9.html for the official advisory). **How Sn1per detects CVE-2024-21733:** Sn1per Professional ships a detection module for this vulnerability in its web scanning engine. Pointed at an internet-facing Apache Tomcat instance, it identifies vulnerable versions, fingerprints the request-smuggling primitive, and confirms exploitability with an active probe — no false positives from version-only matching. Test it on your own infrastructure: https://sn1persecurity.com/wordpress/request-a-trial/. **Credit:** xer0dayz (https://x.com/xer0dayz) at Sn1perSecurity LLC. --- ## Passive Reconnaissance Techniques for Penetration Testers Passive reconnaissance — discovering target information without directly interacting with the target — is the highest-leverage technique in modern bug bounty hunting and penetration testing. As a top-ranked Bugcrowd researcher, xer0dayz has discovered critical vulnerabilities without ever directly scanning the target in question. Passive recon queries 3rd-party services to discover cached and historic URLs from a target and identifies interesting URLs without triggering WAF / IDS / IPS detection. The methodology: 1. **Certificate transparency mining** — pull every subdomain ever issued a TLS certificate from crt.sh and Censys. 2. **Passive DNS** — query historical DNS records to find decommissioned-but-still-exploitable infrastructure. 3. **OSINT collection** — public-record + breach-data + GitHub-secret enumeration for exposed credentials and tokens. 4. **Wayback Machine + Common Crawl** — historic URL discovery to find endpoints that were removed but still respond. 5. **Search-engine dorking** — Google / Bing / Shodan queries to find indexed-but-forgotten admin interfaces. These techniques have led to critical 0day vulnerabilities in commercial security products, corporate-owned websites, and online services — without sending a single probe packet to the target. --- ## Use Cases (11 categories) - **Penetration Testing** — orchestrate the full recon-to-exploit workflow against any in-scope target. 600+ exploits + 10,000+ detections run as one pipeline, with active verification eliminating false positives. - **Attack Surface Management** — discover, monitor, and exploit every internet-facing asset including the ones nobody on your team knows about. - **Bug Bounty Automation** — passive reconnaissance, certificate transparency mining, OSINT collection, and triage workflows in one place. - **Vulnerability Scanning** — aggregate findings from Nessus, OpenVAS, GVM, Nuclei, and custom detection modules into a centralized reporting interface. - **Threat Intelligence** — VirusTotal, Censys, Shodan, and threat feeds integrated directly into the scan workflow. - **CVE Writeups** — original vulnerability research from the Sn1per security team, each with working PoC + Sn1per detection coverage. - **Red Team Simulation** — simulate real-world adversaries with automated attack workflows; scheduled engagements, full exploitation chains, stealth modes that bypass common WAF/IPS signatures. - **Dark Web Monitoring** — identify exposed credentials, leaked data, brand mentions across dark web sources. - **Application Security Testing (DAST)** — scan web applications using integrated Burp Suite, OWASP ZAP, Arachni, WPScan modules. - **Mobile Penetration Testing** — discover and exploit vulnerabilities in iOS and Android applications via the ReverseAPK module. - **Artificial Intelligence (SILENTCHAIN)** — AI-augmented security testing powered by the SILENTCHAIN family; frontier-model analysis on top of HTTP traffic interception with on-prem deployment. --- ## Sn1per Professional 2026 Release Highlights The Pro 2026 release (April 2026) is the largest single release since v10.0 (2022). Highlights: - **Docker-first deployment** — single image, every distro. - **Bootstrap 5 / Tabler UI** — refreshed responsive interface with light + dark mode. - **Workspace Navigator** — fast workspace switching with state preservation. - **Workspace & Host Reports** — CSV, Excel, PDF export. - **JSON API v1.0** — programmatic access for CI / SOAR / SIEM pipelines. - **Offcanvas Quick Commands** — 13 panels, every common action one click away. - **Expanded modules** — ReverseAPK, MassPwn, Threat Intel, Nessus, Burp Suite. - **Maturing SC0PE framework** — more parsers, better noise reduction. - **Hardened PHP library stack** — modern dependencies, audited components. - **New CLI flags** — `-v` (verbose), `-db` (debug), `-rr` (remove resume files). --- ## SILENTCHAIN AI The AI-powered product division of Sn1perSecurity LLC, building the next generation of offensive security tools. SILENTCHAIN serves penetration testers, bug bounty hunters, red teams, and application security engineers who need AI that understands real-world exploitation scenarios — not pattern matching dressed up as intelligence. **Editions:** - **SILENTCHAIN Community** — free Jython Burp Suite extension. Single file (~94 KB). Supports 5 LLM providers: Ollama (on-prem), OpenAI, Claude, Gemini, Azure Foundry. OWASP Top 10 finding reporting via Burp Suite's findings panel. - **SILENTCHAIN Professional** — Jython Burp Suite extension. Supports 7 LLM providers (adds ClaudeCode CLI, OpenRouter, Zai). Adds Phase 2 active verification, WAF detection (25+ WAF types), out-of-band (OOB) testing, 250+ curated payloads. - **SILENTCHAIN Enterprise** — standalone Python 3 CLI + API + Web UI. No Burp Suite dependency. FastAPI + Typer + SQLite. Async scanning. Supports HAR / OpenAPI / raw HTTP / Katana / mitmproxy input. Available as Docker image. - **SILENTCHAIN SOURCE** — AI-powered static code vulnerability scanner. FastAPI + Typer CLI + React 19 web UI. 4-phase pipeline: Discovery → AI Analysis → PoC Generation → Attack Chain Construction. **Differentiation:** AI-powered security testing reliable enough that the AI's verdict is worth acting on. Phase 1 (Discovery) finds candidates; Phase 2 (Active Verification) confirms exploitability with live HTTP probes; only verified findings ship to the report. --- ## Integrations (90+ tools) | Category | Integrations | |---|---| | Vulnerability scanners | Nessus · OpenVAS · GVM 21.x · Nuclei | | Web app testing | Burp Suite Pro · OWASP ZAP · WPScan | | Exploitation | Metasploit | | Reconnaissance | Shodan · Censys · Hunter.io · VirusTotal · Nmap | | AI / LLM | OpenAI · Claude · Gemini · Ollama · Azure Foundry · OpenRouter · Zai | | Notifications & DevOps | Slack · GitHub API · webhook | --- ## Frequently Asked Questions **What is Sn1per?** Sn1per is an automated penetration testing and attack surface management platform that discovers internet-facing assets, identifies vulnerable conditions, and verifies findings with active exploitation. It ships as a free community CLI plus three commercial tiers. **Who makes Sn1per?** Sn1perSecurity LLC, an independent US-based company. Lead development by xer0dayz (1N3), a working penetration tester and bug bounty researcher. Continuously developed since 2014. **Is Sn1per on-prem or SaaS?** Sn1per is on-prem by default. The scan engine runs on customer-controlled infrastructure (bare metal, VM, container, or customer cloud VPC) and never sends asset data, scan results, or exploit signatures off the customer perimeter. There is no SaaS-hosted version. **What's the difference between Sn1per Pro and Sn1per Enterprise?** Pro is single-seat at $984/year and is designed for individual pentesters and small teams (1,000 active hosts, 30 assets per workspace, 5 workspaces). Enterprise is custom-priced and built for organizations monitoring 50,000+ external assets with multi-tenant workspaces, RBAC, distributed scan engines, audit-grade reporting, and SIEM integrations. **Is there a free version of Sn1per?** Yes. Sn1per Community Edition is free and source-available on GitHub. It includes the CLI scan engine but not the commercial Web UI, reporting layer, or active-exploitation modules. **How is Sn1per different from a vulnerability scanner?** A vulnerability scanner expects you to hand it a target list. Sn1per discovers the target list for you — including the assets your CMDB doesn't know about — and then tests each one for exploitable conditions. **Can Sn1per run continuous EASM monitoring 24/7?** Yes. Sn1per Pro 2026 supports configurable scan cadences from hourly to daily, with automatic re-discovery of new subdomains and assets. New exposures trigger Slack / email / SIEM alerts within minutes of discovery. **What's the difference between EASM and a vulnerability scanner?** A vulnerability scanner expects you to hand it a target list. An EASM platform tells you what targets exist in the first place. **What are the best external attack surface management tools?** The category leaders in 2026 are Sn1per, Pentera, watchTowr, Mandiant ASM, and Detectify. Sn1per is the only platform that ships fully on-prem with active exploitation built in. --- ## Trial + Pricing - **Sn1per Professional 2026:** $984/year per seat. 14-day free trial available at https://sn1persecurity.com/wordpress/request-a-trial/. No credit card required. - **Sn1per Enterprise:** Custom pricing. Request a quote at https://sn1persecurity.com/wordpress/request-a-quote/. - **Sn1per Community Edition:** Free. https://github.com/1N3/Sn1per. - **SILENTCHAIN Community Edition:** Free. https://silentchain.ai. --- ## Links - Homepage: https://sn1persecurity.com - Use Cases hub: https://sn1persecurity.com/wordpress/use-cases/ - Documentation: https://sn1persecurity.com/wordpress/documentation/ - GitHub: https://github.com/1N3/Sn1per - Twitter / X: https://x.com/Sn1perSecurity (company), https://x.com/xer0dayz (founder) - Docker Hub: https://hub.docker.com/r/sn1persecurity/sn1per End of llms-full.txt.