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OPENBULLET MASTERY COURSE 2026 — PART 1 OF 5 What OpenBullet Actually Is, How It's Built & Your Complete Setup From Absolute Zero
BlackHatPakistan.net | Official Course Series | Updated September 2026 | 16 Min Read
EDUCATIONAL COURSE — OpenBullet is open-source software used for authorized security testing, QA automation and API research. This course teaches the tool for authorized work on systems you own or have permission to test. You are 100% responsible for your own actions.
COURSE PROGRESS: PART 1 OF 5 — INTRODUCTION & SETUPPart 1: Setup & First Launch ← YOU ARE HERE | Part 2: Config Anatomy | Part 3: LoliScript | Part 4: Testing & Debugging | Part 5: Ecosystem & Defense
Hey fellows, welcome back to Blackhat Pakistan — and welcome to something new.
You asked for it in the replies, in DMs, in the telegram, and honestly in the comments of our existing OpenBullet threads, for months: a proper course. Not a scattered thread, not a YouTube video that dies in two weeks, not a "premium course" that some seller recorded off a free stream. A real, structured, from-absolute-zero-to-operated series that lives on this forum permanently, updated like everything else we maintain here.
This is it. The OpenBullet Mastery Course 2026 — five parts, thousands of words each, building from "I have never opened the tool" to "I understand the entire machine." Part 1 is the foundation: what OpenBullet actually is, where it came from, what it's for, what the editions and forks are, and your complete setup from zero — system requirements, installation, first launch, and a full tour of the interface so nothing on your screen is a mystery by the time you finish reading.
Before we enter, the two permanent house rules of this forum. One: never purchase CC from anyone — and the same permanent distrust applies to anyone selling "premium OpenBullet courses," because this course is free and more complete than anything they charge for. Two: everything here is for authorized testing on systems you own or have written permission to test. The tool is legal, open-source, and on GitHub for the whole world to see — how you use it is your responsibility and your local law's business.
Quick Navigation
| Section | What You'll Learn |
|---|---|
| → What Is OpenBullet | The project, the history, the philosophy |
| → OB1 vs OB2 & The Forks | Every edition explained honestly |
| → What It's Used For | Real use cases, legitimate and otherwise |
| → The Architecture | How the machine is built |
| → Setup From Zero | Requirements, install, first launch |
| → The Interface Tour | Every screen explained |
| → The Vocabulary | Every term you'll need for Part 2 |
→  Student Vault | Hidden — reply to unlock the setup checklist |
| → Homework | Your assignment before Part 2 |
| → FAQ | First-launch questions everybody asks |
1. WHAT IS OPENBULLET? THE PROJECT, THE HISTORY, THE PHILOSOPHY
OpenBullet is an open-source automation suite — a tool built to send HTTP requests, process the responses, and make decisions based on what comes back, at scale, following a reusable recipe. That recipe is called a config, and the config is the heart of everything you'll learn in this course.
Think about what a penetration tester, a QA engineer, or a security researcher actually does all day. They send requests to an application and study the responses. Does this login endpoint behave correctly? Does this API leak data without authentication? Does this registration flow validate inputs properly? Doing that by hand, one request at a time, is slow and sloppy. OpenBullet exists to industrialize that workflow: you define the request once, define what "success" and "failure" look like, feed it a list of test data, and let the machine repeat it thousands of times while you watch the results stream in.
The project was created by the developer known as Ruri, and from day one it lived in public — source code on GitHub, documentation maintained by the community, free to download, free to inspect, free to modify. That matters more than beginners realize. Closed tools ask you to trust a stranger's binary; OpenBullet asks you to read the code. Everything it does is visible, auditable, and permanent. When people ask "is OpenBullet a virus?" — and they ask constantly — the honest answer is that the source has been public since the beginning, and the tool does exactly what its code says it does. Whether that use is authorized or not depends entirely on the hands holding it. A crowbar is a tool too.
The name comes from what it does: it fires small, precisely shaped requests at a target — bullets — in volume, from an open platform. And the ecosystem that grew around it, especially the sharing and selling of configs, turned it into the most recognized name in its category worldwide. When people in this scene say "checker," "config," "OB," or "bullets," they're talking about this tool or its descendants.
2. OPENBULLET 1 VS OPENBULLET 2 — AND EVERY FORK IN BETWEEN
You'll hear four names thrown around constantly — OpenBullet, OpenBullet 2, Anomaly, and "Cookie Edition" — and most threads never explain the difference. Here it is, once, properly:
OpenBullet 1 (OB1) was the original: a Windows desktop application, WinForms interface, written in C#. It ran as a desktop program with a built-in config builder, a runner, proxy management, and an environment system. Millions of copies circulated. It was discontinued in favor of the rewrite, but you'll still see it referenced in older tutorials, and its config format still haunts every converter tool on the internet.
OpenBullet 2 (OB2) is the present and the subject of this course. It's a ground-up rewrite — not an update, a rebuild — with a completely different architecture: instead of a desktop app, OB2 runs as a web-based server. You start it on a machine, then control it from a browser interface, from any device, including your phone. The config system was rebuilt around a modern block-based designer, the scripting engine was rebuilt as LoliScript (Part 3 of this course covers it line by line), and it added a killer feature OB1 never had: remote agents — multiple machines working together under one main instance, so a run can be distributed across hardware.
Anomaly is the most famous community fork — a modified build of OB with custom patches that circulated heavily in the checking scene. Forks like Anomaly are where a lot of the mythology comes from, and also where a lot of the malware comes from, because a "custom build" from an unknown uploader is a sealed box. We'll be blunt in Part 5: most cracked forks circling Telegram channels are OB1 with a renamed title bar, and some of them are stealers with a renamed title bar.
| Edition | What It Actually Is | Should You Touch It? |
|---|---|---|
| OpenBullet 1 (OB1) | The original desktop app, discontinued, WinForms UI | Only for reading old tutorials — build on OB2 |
| OpenBullet 2 (OB2) | The official rewrite: web-based server, block designer, LoliScript, remote agents | Yes — this is the course standard |
| Anomaly | Community fork of OB with custom patches, circulated via Telegram/file hosts | No — unverifiable builds are how people infect themselves |
| "Cookie Edition" & friends | Random renamed forks with zero source transparency | Never — you're downloading a stranger's binary |
| Anything sold as "Premium OB" | A scam, every time, forever | Read the scam section of Part 5 and laugh |
The course standard is OpenBullet 2, from the official GitHub repository, built from source or downloaded from official releases only. Everything in all five parts assumes OB2. If a tutorial tells you to download a random .rar from a Telegram channel, close the tutorial — you're one double-click away from becoming a stealer log yourself. That's not a joke; the stolen-logs economy we documented in our Stealer Logs 2026 guide is fed by exactly that mistake.
3. WHAT IS IT ACTUALLY USED FOR? (THE HONEST MAP)
This section exists because every OpenBullet discussion online is a war between "it's a hacking tool!" and "it's a pentesting tool!" and both sides are describing the same hammer. Here's the honest map of what the tool does and who holds it:
• Security researchers & pentesters: testing authentication flows, credential policies, and rate limiting on systems they're contracted to test. Credential-stuffing resistance testing — "can my login endpoint survive a spraying attack?" — is a standard professional assessment, and automation is how you perform it at a realistic scale.
• QA engineers: regression-testing login flows and API endpoints across builds. When your company changes its password reset flow, you want to re-test a hundred scenarios in minutes, not days. A config is a reusable test.
• API developers: hammering your own API with realistic request patterns to find rate-limit bugs and response-handling errors before customers do.
• Fraud analysts: replaying how an attack against their own platform would look, to tune the defenses. The defense side of this war is documented in every major security vendor's blog — automation detection is a career field.
• The unauthorized side: account checking against services the operator doesn't own — credential stuffing with leaked combo lists, validating stolen accounts, the "checker" scene that made the tool famous. This is illegal in effectively every jurisdiction, it's the reason the tool has the reputation it has, and it's the reason the defense industry around automation detection exists.
This course teaches the machine, on the record, for the first four audiences — that's the same line every legitimate OpenBullet tutorial on the internet walks, and we walk it with more depth than any of them. The skills transfer everywhere. What you do with a crowbar is between you and your local laws, and this forum has never pretended otherwise.
4. THE ARCHITECTURE — HOW THE MACHINE IS BUILT
Before you install anything, understand what you're installing, because OB2's architecture is the reason it feels different from every desktop tool you've used. Four components, one diagram in words:
The Host (the server): OB2 is a .NET application that starts a local web server. When you launch it, it binds to a port on your machine (by default a localhost address with a configurable port) and serves the entire interface through your browser. The host is the brain — it holds your configs, your proxies, your data, and it executes the runs.
The Client (your browser): the interface you see is just a web page talking to the host. This is why OB2 feels modern and why it works from any device on the same network — your phone can be the control panel for a run executing on a machine in the corner.
Remote Agents (optional, the superpower): a second machine (or five) can run a lightweight OB2 agent that connects back to your host and accepts work. When you start a run, you can distribute the job across agents — the host slices the data, the agents process in parallel, results stream back. This is enterprise-grade architecture in a free tool, and it's why OB2 isn't just "OB1 with a new coat."
The Config (the recipe): a config is a saved stack of instructions — requests, parsing logic, conditions, and scripted behavior — that defines one complete automated task from start to verdict. Configs are the skill. The tool is free; the skill of writing configs is what separates students from people who download other people's work, and Parts 2 and 3 of this course exist to make you one of the people who builds.
One more piece belongs in the architecture picture because every real setup includes it: proxies. OB2 has native proxy support — you feed it lists, it rotates them per attempt or per data line, and it marks dead proxies for removal. Why it matters: any serious testing run sends enough requests that source-IP rate limiting becomes your bottleneck, and professional testing uses IP rotation to get an honest picture of an application's behavior without your testing being throttled into uselessness. Our Proxies guide and the Proxy vs VPN breakdown cover the theory; Part 4 of this course covers the practice inside OB2.
5. SETUP FROM ZERO — REQUIREMENTS, INSTALL, FIRST LAUNCH
Here's your shopping list before a single download. The beauty of OB2 is how light it is — this runs on hardware you already own:
| Requirement | Minimum | Comfortable |
|---|---|---|
| Operating system | Windows 10/11, Linux (any modern distro), macOS | Windows 11 or Ubuntu LTS |
| Runtime | .NET SDK (current LTS version — check the official repo for the exact version OB2 targets) | Same, kept updated |
| RAM | 4 GB | 8 GB+ (agents eat RAM on big runs) |
| Disk | 2 GB free | SSD, 10 GB free |
| Browser | Any modern browser for the interface | Chrome/Firefox, updated |
| Network | Any stable connection | Stable + proxy source for real testing |
Step 1 — Install the .NET SDK. OB2 is a .NET application, so the runtime is the one true dependency. Go to the official Microsoft .NET download page (never a mirror), grab the current LTS SDK for your operating system, install it, and verify from a terminal or command prompt with one command: dotnet --version. If that prints a version number, the foundation is done. If it prints "command not found," the install didn't add itself to your PATH — reboot, and if it still fails, reinstall and tick the PATH option.
Step 2 — Get OpenBullet 2 from the official source. The official repository lives on GitHub under the OpenBullet organization. Two legitimate routes: download the latest packaged release from the repository's Releases page, or clone the source and build it yourself with one dotnet command. For the course, use the official release package — building from source is a Part 5 flex for students who want to read the code. The URL bar is your security check: github.com/openbullet — if you're on "openbuIIet" with an uppercase-i, or a mirror hosted anywhere else, close the tab. Every fake build in circulation exists to harvest the machines of people who skipped this paragraph.
Step 3 — Unpack and launch. Extract the release package to its own folder (somewhere sane, not the Desktop of your daily-driver's cluttered graveyard), open a terminal in that folder, and run the OB2 startup command per the release's README — a single dotnet command. The terminal will print the server binding — a localhost address and port. That's the host waking up.
Step 4 — Open the interface. Put that localhost address into your browser. You should see the OB2 web interface load: dark theme, a sidebar, and a dashboard that looks empty because it is — you haven't given it anything to work with yet. If the page doesn't load, ninety percent of the time it's the port being wrong in the URL or the host process having closed in the terminal. The host runs in that terminal; close the terminal, close the tool.
That's it. That's the entire installation — the barrier to entry that "premium course" sellers inflate into six videos is four steps and one dependency. What separates operators from tourists is everything after the install, and that's Parts 2 through 5.
6. THE INTERFACE TOUR — EVERY SCREEN EXPLAINED
Log into the interface and walk the sidebar with me, top to bottom, because Part 2 assumes you know where everything lives:
Dashboard: the landing page — global statistics, CPU/RAM readouts, quick links. It's the cockpit; nothing to configure, everything to glance at.
Configs: the workshop. This is where configs live — imported, created, edited, organized. The config editor (which Part 2 opens like a watchmaker) has three faces you'll get intimate with: Stacks (the visual block designer where requests and logic are chained), Script (LoliScript, the text-based scripting layer), and Settings (config metadata — how it takes data, how it handles proxies, what its environment needs). Stacks and Script are two views of the same logic, and Part 3 is dedicated to that relationship.
Proxies: the armory. Import proxy lists, check them, OB2 tests and marks them. Sources, protocols (HTTP, SOCKS4/5), and how rotation binds to your data — all covered hands-on in Part 4.
Data pools: the ammunition depot. The input your configs consume — lists, files, databases, or generated data. In checking terms, this is where "combos" would go; in legitimate testing terms, this is your test-account list, your test-case CSV, your API endpoint samples. The data pool system in OB2 is flexible: wordlists, files, infinite generators, and database connections.
Runs (the Runner): the firing range. You pick a config, feed it a data pool, attach proxies, set bots (parallel workers), and hit start. The hit screen streams results in real time — every attempt, its verdict (success/fail/to-check/retry/ban), its captured data, its timing. The Runner is where configs prove themselves, and it's the most addictive screen in the tool — Part 4 is basically a date with it.
Jobs / Monitor: OB2's job scheduler — persistent runs, scheduled starts, and the monitoring layer for long operations.
Remote Agents: the fleet management screen, where external agent machines connect and show their status. Zero agents on a fresh install — this is a Part 5 conversation.
Settings / Info: global tool settings, environment variables, and system info. Environment variables matter more than beginners think — configs can reference global environment keys, and clean setups use them instead of hardcoding values into every config.
That's the whole map. Ten screens, one of which you'll live in (Configs), one you'll watch for hours (Runner), and the rest support staff. Screenshots die with site updates — you have the live interface in front of you, and now every region of it has a name.
7. THE VOCABULARY — EVERY TERM YOU NEED FOR PART 2
The scene talks in shorthand that gates out newcomers. Not here. These are the terms, defined once, properly — memorize this table and every tutorial on the internet becomes readable:
| Term | What It Means |
|---|---|
| Config | The recipe — a saved stack of blocks/logic defining one automated task, end to end |
| Block | One instruction unit in a config stack — a request, a parse, a condition, a function |
| Stack | The ordered chain of blocks that makes up a config's logic |
| LoliScript | OB2's text-based scripting language — the code view of config logic (Part 3) |
| Run / Runner | An execution session — config + data + proxies + bots, streaming verdicts |
| Bots | Parallel workers inside a run — more bots = more simultaneous attempts |
| Data pool | The input list a config consumes (accounts, test cases, endpoints) |
| Combo | Slang for credential pairs (email assword) — the classic checking data format |
| Proxies | Rotating source IPs so testing isn't throttled or tied to one address |
| Keychecks | The verdict logic — the response conditions that mark an attempt SUCCESS, FAILURE, or CUSTOM |
| Hit | An attempt that returned SUCCESS — the output the whole machine exists for |
| To-check (2C) | An ambiguous result that needs human review — the honest middle verdict |
| Capture | Data extracted from a successful response (balance, plan, profile fields) |
| Environment / variables | Named values configs read from — the clean way to pass settings around |
| Wordlist | A data source type — plain input lines fed one by one to the config |
| Rate limit | A target's defense that throttles/blocks volume — the reason proxies exist |
| Captcha | Human-verification challenges — the automation wall, handled via solving services or skipped by config design (Part 4) |
| Agent | A remote machine running OB2's agent, executing work for your host |
Eighteen terms. That's the entire gate between "confused lurker" and "someone who reads configs." Print it mentally — Part 2 assumes every one of these.
8. COMMON FIRST-LAUNCH ERRORS & FIXES — SAVE YOURSELF A TICKET
Every beginner hits the same five walls in the same order. The support section of this thread gets these questions weekly, so here are the fixes, pre-written, because your time is worth more than a reply wait:
| Error / Symptom | The Cause | The Fix |
|---|---|---|
| "dotnet is not recognized" in terminal | SDK installed but PATH not updated | Reboot first; if still failing, reinstall the SDK and enable the PATH option, or add the dotnet folder to PATH manually |
| Host starts then immediately closes | Wrong .NET version for the OB2 build, or port already in use | Check the release README for the exact required SDK version; change the port in the config file if it collides |
| Browser page won't load at the address | Typing the wrong port, or the host process died | Read the exact address from the terminal output — copy it character for character; keep the terminal window open, closing it kills the host |
| Interface loads but feels frozen / actions do nothing | Browser cache serving an old interface, or an extension interfering | Hard refresh (Ctrl+Shift+R), try a clean browser profile, disable script blockers for the localhost address |
| Config imports but shows errors immediately | Config built for a different OB2 version, or corrupted by a Telegram re-upload | Match versions, and only import configs from official/community-verified sources — this is the single most common infection route in the entire scene |
| Everything is slow on big lists | Running the host on an overloaded machine, or absurd bot counts | Start runs at low bot counts and scale up; the machine serving the interface is also doing the processing |
Notice the pattern in that table: almost every disaster traces back to two roots — version mismatch or an untrusted download. The tool itself is stable; the scene around it is what bites. That's not an accident, and it's the bridge to the next section, because the same paranoia that protects your install protects everything else you do at this keyboard.
9. LAB HYGIENE — THE MACHINE DISCIPLINE THIS COURSE ASSUMES
Every professional who touches testing tooling follows a machine discipline that beginners skip and regret. This course assumes it from Part 1, so here it is — the lab hygiene baseline, stated once, expected forever:
Separate the environments. Your daily-driver machine — the one with your personal accounts, your saved sessions, your life in its browser — is not your testing machine. Either dedicate a separate user account on your box for tooling work, or go further and run a dedicated virtual machine for everything in this course. The professionals who do this for a living don't mix environments, and the beginners who learn why the hard way become the case studies in our stealer logs research. The chain is always the same: a "free tool" from an untrusted source runs on the daily-driver, harvests the browser, and two weeks later the victim is reading our Stealer Logs guide trying to find out which of their accounts just walked away.
Verify every download twice. Official repository, official releases page, and if the release publishes hashes, check them. The thirty seconds a hash check takes is the cheapest insurance in this entire scene. A renamed binary in a Telegram archive is not a version of OpenBullet — it's somebody's distribution channel for a stealer, wearing the name.
Keep the course environment disposable. The beauty of doing this properly is that nothing in your lab matters — configs get rebuilt, lists get regenerated, environments get recreated. When your testing environment is disposable, mistakes cost minutes. When it's tangled into your real machine, mistakes cost identities. Disposable is the goal; the hammer scene from our Dark Web Diaries #1 is what non-disposable looks like at the end.
Document as you go. The pros keep a lab notebook — what was installed, what was changed, what worked. In Part 4, when your first real run behaves strangely, that notebook is the difference between debugging in ten minutes and guessing for two days. Discipline compounds; that's the actual lesson of every skill this forum teaches.
That's the hygiene baseline. It costs you an evening to set up and it's the reason the rest of this course can move fast — because the environment under it doesn't rot.
10.
THE STUDENT VAULT — REPLY TO UNLOCKThe official setup checklist — the exact post-install sequence, first config import exercise, and the verified resource index for this course — is behind this lock, free like everything on this forum. Reply to the thread and it opens:
11. HOMEWORK — YOUR ASSIGNMENT BEFORE PART 2
This is a course, so it has homework — and doing it is the difference between reading about OpenBullet and knowing OpenBullet. Before Part 2 drops, complete these five:
1. Full install completed, interface secured, working folders created.
2. One educational config imported from official sources.
3. The vocabulary table read twice — out loud if you're brave.
4. The three faces of the config editor visited: Stacks, Script, Settings — just look at them, eyes before hands.
5. One question posted in the replies about anything in Part 1 that didn't click. Students who ask learn twice as fast, and the replies section is where course support lives — free, forever, from people who actually use the tool.
12. FIRST-LAUNCH FAQ — QUESTIONS EVERY BEGINNER ASKS
Is OpenBullet legal?
The software is legal, open-source, and public — like a network scanner or a lock-pick set. Legality is determined by use: testing your own systems or systems you're contracted to test is standard security practice; testing systems you don't own is a crime in effectively every country. This course teaches the tool for the first category.
What's the difference between OpenBullet 1 and 2?
OB1 was the original desktop app, discontinued. OB2 is the official ground-up rewrite — web-based interface, modern block designer, LoliScript, remote agents. This course teaches OB2 exclusively.
What are OpenBullet configs?
Reusable instruction files — a saved stack of requests, parsing logic, and verdict rules that define one complete automated task. Configs are the skill this course builds, from Part 2 onward.
Is OpenBullet free?
The official tool is 100% free and open-source. Anything sold as "premium OpenBullet," a "paid license," or an "exclusive build" is a scam — Part 5 dissects that economy in full.
What are Anomaly and Cookie Edition?
Community forks — modified builds circulated through Telegram and file hosts with unverifiable contents. Some are rebranded originals; some are malware. This course uses official OB2 from the official repository only.
Why does the interface run in my browser?
Because OB2 is a web server, not a desktop app. The host runs on your machine and serves the interface to any browser — which also enables remote agents, phone-based control, and headless server operation.
What are bots in a run?
The parallel workers executing attempts simultaneously. More bots = faster runs = more pressure on your proxies and more visible to a target's rate limiting. Bot tuning is a Part 4 skill.
What are "hits," "to-checks," and "captures"?
Hit = a success verdict. To-check = an ambiguous result needing human eyes. Capture = data extracted from a success (profile fields, balances, plan names). The Runner's verdict system is built on these.
Do I need proxies to start learning?
No — Part 1 and Part 2 need nothing but the tool. Proxies enter at Part 4, when runs get real. Learning on proxies first is like learning to drive in traffic.
Should I buy a paid OpenBullet course?
Never. This five-part course is free, deeper than anything sold, and permanently maintained on this forum. Paid-course sellers are reselling free documentation — the same scam economy dissected in Part 5.
COURSE LINKS — THE FULL SERIES
| Part | Topic | Status |
|---|---|---|
| Part 1 | Introduction & Setup — THIS THREAD |  Available |
| Part 2 | Config Anatomy — blocks, stacks, keychecks, your first config read line by line | Available here |
| Part 3 | LoliScript — the complete scripting language guide | Available here |
| Part 4 | Testing & Debugging — proxies, bots, tuning, verdict logic | Available here |
| Part 5 | The Ecosystem — config markets, seller scams, automation defense | Available here |
Related community reading while you wait for Part 2: our existing OpenBullet Config Making 2026 thread — the community discussion this course grew out of — plus the Tools/Configs section and the safe communities guide for the OPSEC mindset this course assumes.
FINAL REMINDER: NEVER PURCHASE CC FROM ANYONE. NEVER BUY "PREMIUM" OPENBULLET ANYTHING. THE TOOL IS FREE, THE COURSE IS FREE, THE SKILL IS YOURS. This course is for educational purposes and authorized testing only. Blackhat Pakistan does not promote illegal activity. Follow your local laws and regulations.
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Reply with your setup results and your Part 1 questions — course support lives in the replies.
Last Updated: September 11, 2026 | OpenBullet Mastery Course 2026 | Blackhat Pakistan Community
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