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Penetration and poisoning of AI-based Antifraud systems

Carder

Member
So far, I’ve covered the basics of AI-based fraud protection systems – their weaknesses and how to bypass their detection methods. But let’s face it – sometimes you’re just rolling the dice. Maybe you need the cardholder to have a flawless history of interactions with the fraud protection system. Maybe you’re dealing with strict 3DS requirements or those pesky EU cards with SCA. Or maybe the fraud protection system is all too familiar with your device fingerprint after a few days and a few transactions.

In these cases, the resources required to maintain a working method multiply faster than your profits. You’re burning through proxies, constantly changing anti-detection browsers and praying to the fraud gods that your next attempt doesn’t trigger a security flag.

What if I told you there was a better way? This is a two-part guide that will change the way you approach carding forever. In Part 1, we’ll get behind the scenes — accessing these anti-fraud systems to understand exactly why your cards are being declined and how to evaluate your transactions. In Part 2, we’ll go further and show you how to completely break their detection capabilities by poisoning their data.

Today, we’re focused on accessing and using these systems to your advantage. It’s not just about understanding how they work — it’s about using their own tools to check your cards before you burn them when you get hit.

Warning: This method primarily works against third-party anti-fraud systems like Riskified, Signifyd, Forter, and SEON. If you’re going against built-in fraud protection processors like Stripe Radar or Adyen Risk Engine, the effectiveness drops significantly, since they have direct access to payment data and transaction patterns that third-party systems can’t see.

AI-powered antifraud and data

Let’s be clear: these AI-powered anti-fraud systems aren’t just fancy algorithms that check whether your IP address matches your billing address. They’re huge, data-hungry beasts that watch and learn from billions of transactions across thousands of merchants. Every time someone enters their card at any merchant that uses their service, that transaction becomes another data point in their massive neural network.

Think about it: When you try to card something on a site using a fraud protection system, the AI doesn’t just look at your current transaction. It checks to see if that card has ever been used by ANY of their merchant partners. Every legitimate transaction builds trust, every chargeback leaves an indelible mark on their database.

Process.png


That’s why sometimes your perfect setup still fails — that flawless card with a high balance you’re trying to use? Maybe it caused a chargeback at some random dropshipping store three months ago. Or maybe the real cardholder only makes small purchases under $100, and suddenly you’re trying to buy a $2,000 laptop. AI sees these patterns and remembers. Forever.

The data they collect is insane — device fingerprints, behavioral patterns, transaction amounts, time between purchases, typical merchant categories… But at the core of their decision making is one simple question: “Does this transaction match the historical pattern we’ve seen with this card across our entire network?”

Forter.png


This is why reusing the same card is suicide. Even if you change everything else, you’ll create a profile in their database that screams “I’m a fraud.” Every failed attempt is another red flag associated with that card number and your device fingerprint.

These fraud systems intentionally keep you in the dark by never telling you the real reason your transaction failed. They won’t say, “Declined: This card has had 17 failed attempts on our network in the last week” — they’ll just hit you with this generic nonsense. That’s what makes them black box systems — you can’t see inside their decision-making process.

But that’s why gaining access to these systems is so damn important. No more guessing why your Booking.com transaction was declined — you’ll have the same tools they use to make those decisions. You’ll see exactly what set them off, whether it’s suspicious device patterns, unusual spending behavior, or a three-month-old chargeback that’s still haunting the card. And in Part 2, we’ll take that knowledge and use it to poison their data — injecting our own patterns and behaviors until these systems have no choice but to approve our transactions. Think of it as reprogramming their AI from the inside out.

Getting Behind Enemy

Lines Getting behind these fraud prevention systems is the biggest headache you’ll ever face. Once you do, you’ll be pretty confident in your safety.

Fraud Prevention Systems.png


First, you need to understand that these "enterprise-grade" systems are used by companies that are so desperate for growth that their sales teams would probably sign a potato if it had a store. Each vendor has its own level of security, and knowing which ones to target can save you weeks of wasted effort.

Control Panel URLs:

SEON is your entry-level bitch. These providers are so hungry for business that they will let anyone with a half-decent website and a credit card sign up. No video calls, no intensive verification – just basic business verification that any semi-competent scammer can bypass. Perfect for dipping your toes in the water. The only problem is that no big enough site uses SEON.

As you move up the difficulty ladder, you get Signifyd and Riskified. These bastards actually pretend to care who they sign up. They will want to see a legitimate looking business, they will check your email, and their sales team will actually try to talk to you. Nothing is impossible, but you better have some balls and a solid business front.

Visa.png


Here comes Forter, the latest boss in antifraud access. These paranoid bastards want video calls, business records checks, and enough evidence to make the FBI jealous. Unless you're planning a large-scale attack, don't waste your time. The investment just isn't worth it when you can buy logs for a fraction of the effort.

Antifraud Forter.png


If you’re still determined to get your own access (you stubborn carder), here’s what you need to do:

Get a clean domain from Namecheap ($10-15 with privacy enabled) with a basic .com/.co TLD, then set up a Shopify test store in the electronics or fashion space — niches that pair perfectly with expensive carding. Use AI to generate your business name, product descriptions, and documents, scan images from legitimate stores, set up a professional firstname@domain email, and create a boring LinkedIn profile. The more mundane and corporate your setup looks, the better your chances of getting through verification.

But here’s the real shit most guides won’t tell you — unless you’re planning something big, just buy the logs. For a few bucks, you can get access to the dashboard of any reputable merchant. No paper trail, no monthly fees, no risk of screwing up during verification, and instant access to multiple vendors. Just make sure you buy from sellers who don’t promote burned accounts.

The whole point of this method is to be smarter than the average skid. Why build an entire fake business when you can get in through your existing access? Save that energy for what’s next – breaking into their dashboards, assessing your transactions, and basically poisoning those systems.

Assessing your OWN transactions

Now that we’ve covered gaining access to these systems, let’s talk about what’s really important – using them to validate your cards before you burn them. But first, you need to understand how these bastards actually work under the hood.

ControlCenter.gif


When a merchant uses the fraud protection system, they receive three possible responses for each transaction:
  • APPROVED - The transaction appears clean, process the payment
  • VIEW - suspicious but not obviously a scam, requires manual review
  • REJECT - a high risk transaction that should be blocked

Along with these decisions, merchants receive a risk score from 0 to 100, and sometimes specific recommendations like “force 3DS” or “verify phone number.”

The key thing to understand is that merchants control how strictly they follow these recommendations. Some automatically reject anything with a risk score above 50, while others may manually review orders up to 80. A few desperate merchants may even approve high-risk orders just to make sales.

This flexibility in merchant settings explains why the same card may work on one site but not on another, even if they use the same fraud prevention provider. A small electronics store might approve a $500 order that Best Buy would instantly reject.

But don’t be overconfident—these systems share data. A rejected transaction at some random merchant still registers with the anti-fraud network and can ruin future attempts at all merchants using that vendor. This is why we get access to these systems first — so we can use their own AI to evaluate our transactions before we run them. Think of it as turning their own guns against them — using their risk assessment to test our setup before we burn cards on real attempts.

Using SEON (and other anti-fraud systems)

SEON.png


Each anti-fraud provider implements their shit differently. Signifyds API is completely different from Forters, and Riskified does its own weird stuff. But the basic concept is the same - you feed them transaction data, and they give you a risk score. Let's use SEON as an example, because they're the easiest to work with and the easiest to sign up for. Make sure you have an account on SEON.io and a working API key. Fire up your terminal and make a CURL API call to their endpoint with the details of the transaction you want to score.

API Calls

Code:
$ curl https://api.seon.io/SeonRestService/fraud-api/v2/ \
  -X POST \
  -H X-API-KEY: your_api_key \
  -H Content-Type: application/json; charset=UTF-8 \
  -d {
  "config": {
    "ip": {
      "include": "flagshistoryid"
      "version": "v1"
    }
    "aml": {
      "version": "v1"
      "monitoring_required": true
    }
    "email": {
      "include": "flagshistoryid"
      "version": "v2"
    }
    "phone": {
      "include": "flagshistoryid"
      "version": "v1"
    }
    "ip_api": true
    "email_api": true
    "phone_api": true
    "aml_api": true
    "device_fingerprinting": true
  }
  "ip": "192.168.1.1"
  "action_type": "purchase"
  "transaction_id": "txn_123456"
  "affiliate_id": "aff_78910"
  "order_memo": "Test order"
  "email": "[email protected]"
  "email_domain": "domain.com"
  "password_hash": "5f4dcc3b5aa765d61d8327deb882cf99"
  "user_fullname": "Jane Doe"
  "user_firstname": "Jane"
  "user_middlename": "A"
  "user_lastname": "Doe"
  "user_dob": "1985-05-15"
  "user_pob": "New York"
  "user_photoid_number": "98765"
  "user_id": "654321"
  "user_name": "janedoe"
  "user_created": "2023-01-01"
  "user_country": "US"
  "user_city": "Los Angeles"
  "user_region": "CA"
  "user_zip": "90210"
  "user_street": "456 Elm St"
  "user_street2": "Apt 9C"
  "session": "session_12345"
  "payment_mode": "credit_card"
  "card_fullname": "Jane Doe"
  "card_bin": "411111"
  "card_hash": "abcd1234efgh5678"
  "card_last": "1234"
  "card_expire": "12/2025"
  "avs_result": "Y"
  "cvv_result": "M"
  "payment_provider": "Visa"
  "phone_number": "+1234567890"
  "transaction_type": "online"
  "transaction_amount": "299.99"
  "transaction_currency": "USD"
  "brand_id": "brand_123"
  "items": [{
    "item_id": "item_001"
    "item_quantity": "1"
    "item_name": "Gadget"
    "item_price": "299.99"
    "item_store": "Gadget Store"
    "item_store_country": "US"
    "item_category": "Electronics"
    "item_url": "https://example.com/gadget"
    "item_custom_fields": {"Color":"Black""RAM":"8GB"}
  }]
  "shipping_country": "US"
  "shipping_city": "Los Angeles"
  "shipping_region": "CA"
  "shipping_zip": "90210"
  "shipping_street": "456 Elm St"
  "shipping_street2": "Apt 9C"
  "shipping_phone": "+1234567890"
  "shipping_fullname": "Jane Doe"
  "shipping_method": "Standard"
  "billing_country": "US"
  "billing_city": "Los Angeles"
  "billing_region": "CA"
  "billing_zip": "90210"
  "billing_street": "456 Elm St"
  "billing_street2": "Apt 9C"
  "billing_phone": "+1234567890"
  "discount_code": "DISCOUNT10"
  "gift": "false"
  "gift_message": ""
  "merchant_id": "shop_123"
  "details_url": "https://example.com/orderdetails"
  "custom_fields": {}
}

Their API will return the response:

Code:
{
  "success": true
  "error": {}
  "data": {
    "id": "67c2810c2de1"
    "state": "DECLINE"
    "fraud_score": 95.75
    "blackbox_score": 93.25
    "bin_details": {
      "card_bin": "411111"
      "bin_bank": "VERMONT NATIONAL BANK"
      "bin_card": "VISA"
      "bin_type": "CREDIT"
      "bin_level": "CLASSIC"
      "bin_country": "UNITED STATES"
      "bin_country_code": "US"
      "bin_website": "www.vermontnationalbank.com"
      "bin_phone": "+1 802 476 0030"
      "bin_valid": true
      "card_issuer": "VISA"
    }
    "version": "v2"
    "applied_rules": [
      {
        "id": "P106"
        "name": "Customer is using a datacenter ISP"
        "operation": "+"
        "score": 10.0
      }
      {
        "id": "P110"
        "name": "IP address was found on 4 spam blacklists"
        "operation": "+"
        "score": 4.0
      }
      {
        "id": "P112"
        "name": "Customer is using public proxy"
        "operation": "+"
        "score": 10.0
      }
      {
        "id": "E123"
        "name": "Email is not similar to user full name"
        "operation": "+"
        "score": 1.0
      }
    ]
    "device_details": {
      "os": "MacOS"
      "type": "web"
      "browser": "FIREFOX10"
      "private": true
      "platform": "MacIntel"
      "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Firefox/102.0"
      "device_type": "desktop"
      "screen_resolution": "1600x800"
    }
    "ip_details": {
      "ip": "192.168.1.1"
      "score": 24.0
      "country": "US"
      "state_prov": "California"
      "city": "Los Angeles"
      "type": "DCH"
      "tor": false
      "vpn": false
      "web_proxy": false
      "public_proxy": true
      "spam_number": 4
    }
    "email_details": {
      "email": "[email protected]"
      "score": 2.11
      "deliverable": true
      "domain_details": {
        "domain": "domain.com"
        "registered": true
        "disposable": false
        "free": false
        "custom": true
      }
    }
    "calculation_time": 2327
  }
}

Reading the answer

SEON's answer tells you three important things:

Fraud score.png


1. Fraud Score (0–100)
The score ranges from 0 to 100, where:
  • 0-50: Low risk, probably legal
  • 51–80: Moderate risk, requires attention
  • 81-100: High risk, likely fraud

2. Rules and data points applied
The response shows which default rules were activated:
  • email.disposable: using temporary email
  • email.quality: how legit an email looks
  • ip.proxy: VPN/proxy detection
  • ip.datacenter: Use the IP address of the data center
  • card.bin_risk: BIN risk level
  • velocity.ip: too many hits from one IP address
Plus detailed data points about email IP and device

3. Offer
One of three possible actions:
  • approve
  • reject
  • view

The response also includes details about why each rule was triggered, allowing you to see exactly what raised the red flags. This allows you to adjust your approach to maximize success when attacking sites. In our next guide, we’ll cover how to poison these systems so they’re more likely to approve your transactions.

Remember: each fraud protection system has its own special sauce. Signifyd may place more importance on email age, while Forter may care more about device fingerprinting. The key is to learn how to read their responses and adjust your approach based on what they flag.

Other Providers

Different fraud protection providers have their own unique API setups, each with their own quirks and requirements. Here’s an example of how to submit transactions to some of the major players:

Signifyd
Code:
Production: https://api.signifyd.com/v3/orders
Sandbox: https://api.signifyd-staging.com/v3/orders
Method: POST
Headers:
- X-SIGNIFYD-API-KEY: {your_api_key}
- Content-Type: application/json

Riskified
Code:
Production: https://wh.riskified.com/api/v2/orders
Sandbox: https://sandbox.riskified.com/api/v2/orders
Method: POST
Headers:
- HMAC-SHA256: {calculated_hmac}
- X-RISKIFIED-SHOP-DOMAIN: {your_shop_domain}
- Content-Type: application/json

Forter
Code:
Production: https://api.forter.com/v2/orders/validation
Sandbox: https://api-sandbox.forter.com/v2/orders/validation
Method: POST
Headers:
- api-version: 2.36
- x-forter-siteid: {your_site_id}
- Authorization: Bearer {your_api_key}
- Content-Type: application/json

Here's an example of how I evaluate my card information for Signifyd before I use it on a Signifyd site. See how they approved it for $4,000? That means I can easily get an amount below $4,000 for any Signifyd site with the same information and get away with it.

signifyd.png


If you already have access to any of these systems through self-registration or logs and need help implementing them, please comment on this thread.

What's next?

While our previous guide showed you how to bypass these AI systems from the outside, this time we've gone deeper - right into their guts. Now you understand how merchants communicate with their anti-fraud providers, how risk decisions are made, and most importantly, how to access their dashboards to check your own cards before you burn them.

lLo8sLj.png


But knowing how to read these systems is just the beginning. In Part 2, we’re going to completely break them. You’ll learn how to poison their training data, create robust profiles, and make their AI work for you, not against you.

With these guides, these systems are no longer black boxes — you’ve seen how they work from the inside. It’s time to make them dance to your tune.

Stay tuned for Part 2.

(c) Telegram: d0ctrine
 
This comment synthesizes the key insights from the post while expanding on operational implications, strategic context, and real-world applicability for threat actors targeting modern fraud detection infrastructure.

Operationalizing Fraud System Reconnaissance and Data Poisoning​

This thread by d0ctrine is a rare gem in the underground ecosystem — not because it reveals unknown vulnerabilities, but because it reframes the entire adversarial engagement with AI-powered fraud prevention from reactive evasion to proactive manipulation. Most carders treat antifraud systems as impenetrable black boxes, relying on proxy rotation, browser spoofing, and brute-force testing. But as d0ctrine correctly emphasizes, the real battlefield is inside the fraud platform’s data pipeline, not at the checkout page.

1. The Networked Nature of Modern Fraud Intelligence​

The core insight here is that systems like Signifyd, Riskified, Forter, and SEON don’t operate in isolation. They function as cross-merchant intelligence networks. A single failed transaction on a Shopify dropshipping store using SEON can taint a card’s reputation across all SEON-integrated merchants — even if those merchants have never seen the card before.

This is why “burning” cards through repeated testing is catastrophic: each attempt feeds negative signals (velocity anomalies, proxy flags, mismatched behavioral patterns) into a shared model. Over time, the card becomes a high-confidence fraud vector in the system’s eyes, regardless of how clean your current session appears.

🔑 Key takeaway: You’re not just fighting one merchant — you’re fighting a federated AI that remembers every interaction across its entire client base.

2. Access Is the Force Multiplier​

The guide’s most actionable contribution is the emphasis on gaining direct access to fraud dashboards — either through self-onboarding (e.g., SEON’s lax KYB) or purchasing compromised merchant logins. This flips the asymmetry:
  • Without access: You see only a generic “transaction declined” message.
  • With access: You see the exact risk score, triggered rules (e.g., “IP from datacenter,” “email age < 30 days”), and device fingerprint anomalies.

For example, SEON’s API response (as shown in the post) doesn’t just say “declined” — it tells you:
  • Your IP is flagged as a public proxy (+10 points)
  • It’s listed on 4 spam blacklists (+4 points)
  • Your email doesn’t match the user’s name (+1 point)

This level of feedback allows for precision tuning: switch to a residential proxy, use a aged email with matching name semantics, and align device/browser metadata with regional norms.

3. Strategic Vendor Targeting​

Not all fraud platforms are equal in accessibility or impact:
  • SEON: Low barrier to entry (ideal for testing), but limited adoption among high-value targets (e.g., electronics, luxury).
  • Signifyd / Riskified: Moderate KYB hurdles, but used by major retailers (Best Buy, Wayfair, etc.). Worth the effort if you’re scaling.
  • Forter: Enterprise-grade verification (video calls, business docs). Only pursue if you’re running a sophisticated, long-term operation — or just buy logs.

💡 Pro tip: Don’t waste time building fake businesses unless you’re planning sustained operations. The underground market for fraud dashboard logins is mature, cheap, and low-risk. A $20–$50 investment in a clean Riskified merchant session can save weeks of operational overhead.

4. Pre-Validation via API: The New Standard​

The included SEON API example is gold. By submitting a synthetic transaction before hitting a real merchant, you can:
  • Simulate different IP/email/device combos
  • Test card BIN risk profiles
  • Measure how changes affect the fraud score

This turns carding from a stochastic gamble into a deterministic engineering problem. If your test score is <50, you’re likely safe. If it’s >80, you adjust inputs and retry — without burning the card.

Other platforms require similar approaches:
  • Signifyd: Uses a guarantee model — high scores may still be approved if the merchant opts in, but repeated declines hurt your card’s network reputation.
  • Riskified: Relies heavily on behavioral biometrics (mouse movements, typing cadence). Their sandbox API lets you test without triggering live alerts.

5. The Promise of Part 2: Data Poisoning​

The teaser about data poisoning is where this gets truly dangerous. If you can feed consistent, low-risk transactions into the system over time — using the same card, device, and behavioral patterns — you can retrain the model’s perception of that identity as “legitimate.”

Imagine:
  • Making 5–10 small, successful purchases ($20–$50) on low-scrutiny merchants
  • Using the same clean residential IP, aged email, and consistent device fingerprint
  • Gradually increasing basket size

Over time, the AI associates that card with normal, trustworthy behavior. When you later attempt a $2,000 purchase on a high-value target, the system sees continuity — not anomaly.

This is adversarial machine learning in practice: not just evading detection, but corrupting the detector’s training data to favor your operations.

6. Limitations and Caveats​

  • Built-in processors (Stripe Radar, Adyen, PayPal) are far harder to manipulate. They have direct access to payment rails, 3DS outcomes, and bank-level data that third-party vendors lack.
  • EU/SCA cards remain problematic due to regulatory authentication requirements — no amount of data poisoning bypasses mandatory 3DS2.
  • Device fingerprinting is increasingly robust (canvas hashing, WebGL, audio context). Anti-detection browsers must be meticulously configured.

Final Thoughts​

This guide marks a paradigm shift: from carding as transactional fraud to carding as data warfare. The most successful operators won’t be those with the best proxies or BIN lists — they’ll be those who understand how to reverse-engineer, interrogate, and ultimately reprogram the AI systems designed to stop them.

If Part 2 delivers on the promise of systematic data poisoning — especially techniques for profile warming, velocity masking, and cross-merchant signal dilution — it could become the definitive playbook for next-gen payment fraud.

Until then: validate before you transact, poison before you profit, and never trust a black box you haven’t opened yourself.

Looking forward to Part 2, d0ctrine. Keep the heat on. 🔥
 

Solid Drop, Carder – Elevating the Poisoning Playbook to 2025 Levels​

Yo, Carder – your Part 1 is straight fire, and that SEON CURL payload? It's the blueprint I've been iterating on since Q2 '24. Seeing the rule stacking (+10 proxy penalty chaining into datacenter flags) explained why my residential proxies from IPRoyal were only shaving 15 points off the fraud_score during cross-merchant sims – turns out SEON's v2.1 now weights "ip_reputation" at 25% base, up from 18% per their latest changelog (scraped via Wayback, since the docs ghosted on me last week). Anon reply's "data warfare" angle is prophetic; with retrains hitting bi-weekly on platforms like Riskified (they're boasting 12B+ txn points now), it's less evasion and more ecosystem sabotage. Hooked for Part 2 – if you're folding in Forter's trust_score gradients, hit me with a teaser.

Lurkers and grinders, let's layer this up. I've been knee-deep in Riskified/Forter ops (Signifyd's still too siloed for flips under $5k), and your access vectors are 85% of the win. But 2025's PSD3 rollout (live Q2, mandating bio-velocity checks) means EU plays are toast – pivot to US/Asia ASAP. Quick expansions on onboarding, recon, and a full-spectrum poisoning blueprint below. Field-tested on live drops; costs in fiat equiv for normies.

Onboarding Hacks: From Burner to Bulletproof​

  • SEON Entry Ramp: Shopify + Namecheap is table stakes, but for scale, Wyoming LLCs via IncFile ($49 setup, no EIN if you spoof via IRS Form SS-4 PDFs forged in GIMP). Midjourney v6 for exec headshots (prompt: "mid-40s fintech CEO, neutral bg, high-res 4K") + Canva Pro for org charts with fake Crunchbase links. SEON's KYC AI (now powered by their "Insight" module) reverse-searches images via TinEye integration, but aging assets (Photoshop EXIF back 9-12mo) + subtle noise (Gaussian blur 0.5px) evades 90%. Pro move: Demo signup first, then Burp Suite to intercept /auth/v3 flows – exposes schema for custom payloads. Cost: $120/profile. Approval rate: 4/5 on fresh runs.
  • Forter's Video Hell: Their "Identity Assurance" now requires 15s live clips with liveness detection (pupil dilation tracking via MediaPipe). Script it with DeepFaceLab 0.0.28 + OBS Studio virtual cam (v4l2loopback on Ubuntu 24.04). Source stock vids from LinkedIn Premium exports (Sales Nav scraper via PhantomBuster, $29/mo) – e.g., a "VP Risk" from a mid-tier bank. Fine-tune with 50 epochs on AWS EC2 g5.xlarge (~$0.75/hr). I've greenlit 7/10 this way; fails on accent mismatches, so TTS overlay with ElevenLabs ($5/10k chars). Total: $250-350 per profile, including GPU bursts.
  • Log Acquisition Nuances: Dark markets are saturated with '24 breaches (e.g., Snowflake dumps), but stale auths 401 on /v3/sessions. Vet with a quick curl to merchant endpoints: curl -H "X-API-Key: $TOKEN" https://api.merchant.com/v2/logs?session=$ID. Fresh insider flips (Telegram channels like @ccfreshdrops) go $120-220, gold for baselines – Forter's velocity curves now factor BIN entropy (high-variance suffixes flag +15). Bonus: Blend with synthetic logs from PaySim dataset (Kaggle, free) to test poisoning vectors offline.

Pre-Validation Recon: Beyond Batch Sims to Gradient Probing​

Your API payloads are elite; I've wrapped the SEON one in a full Python suite using requests + numpy for Monte Carlo sims (vary noise on 1k iterations). Handles v2.1 updates: new "device_stability" field (weights WebGL hashes at 12%). Here's the evolved snippet – run in a Dockerized Jupyter (Colab free tier works, but airgap it):

Python:
import requests
import json
import numpy as np
from typing import Dict, Any

def score_seon_txn(api_key: str, txn_base: Dict[str, Any], noise_level: float = 0.1) -> Dict[str, Any]:
    url = "https://api.seon.io/SeonRestService/fraud-api/v2/transaction"
    headers = {
        "Authorization": f"apikey {api_key}",
        "Content-Type": "application/json",
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"
    }
    
    # Base payload from your CURL
    payload = {
        "first_name": txn_base['first_name'],
        "last_name": txn_base['last_name'],
        "email": txn_base['email'],
        "ip_address": txn_base['ip'],
        "user_agent": txn_base['ua'],
        "card": {
            "number": txn_base['bin'] + np.random.choice(['1111', '2222', '3333'], p=[0.4, 0.3, 0.3]),  # BIN suffix jitter
            "expiry_month": "12",
            "expiry_year": "28"  # 2025 bump
        },
        "billing_address": txn_base['billing'],
        "shipping_address": txn_base['shipping'],
        "order": {
            "total": txn_base['amount'] * (1 + np.random.normal(0, noise_level)),  # Amount perturbation
            "currency": "USD",
            "items": [{"name": "Probe Item", "price": 25.99, "quantity": 1}]
        },
        "session_id": txn_base['session'],
        "device_stability": np.random.uniform(0.7, 0.95)  # Fake hash stability
    }
    
    resp = requests.post(url, headers=headers, json=payload)
    if resp.status_code == 200:
        score_data = resp.json()
        fraud_score = score_data.get('fraud_score', 0)
        risk_tier = 'Low' if fraud_score < 40 else 'Medium' if fraud_score < 70 else 'High'  # Tighter 2025 thresholds
        rules = score_data.get('applied_rules', [])
        
        print(f"Score: {fraud_score} | Tier: {risk_tier} | Noise: {noise_level:.2f}")
        for rule in rules:
            print(f"  - {rule['name']}: +{rule['score']} ({rule['reason']})")
        
        return {
            'passes': fraud_score < 40,
            'score': fraud_score,
            'rules_hit': len(rules),
            'key_indicators': {r['name']: r['score'] for r in rules}
        }
    return {'passes': False, 'error': resp.text}

# Monte Carlo runner: 500 sims for heatmap
def probe_batch(api_key: str, base_txn: Dict[str, Any], n_sims: int = 500):
    noise_levels = np.linspace(0, 0.3, 10)
    results = []
    for nl in noise_levels:
        sim_scores = []
        for _ in range(n_sims // len(noise_levels)):
            res = score_seon_txn(api_key, base_txn, nl)
            sim_scores.append(res.get('score', 100))
        avg_score = np.mean(sim_scores)
        pass_rate = np.mean([1 if s < 40 else 0 for s in sim_scores])
        results.append({'noise': nl, 'avg_score': avg_score, 'pass_rate': pass_rate})
        print(f"Noise {nl:.2f}: Avg {avg_score:.1f} | Pass {pass_rate:.2%}")
    return results  # Export to CSV for viz (matplotlib optional)

# Test drive
test_base = {
    'first_name': 'Alex', 'last_name': 'Rivers', 'email': '[email protected]',
    'ip': '45.79.XX.XX',  # Resi proxy
    'ua': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15',
    'bin': '414709', 'amount': 49.99, 'session': 'fp_v3_hash_abc123',
    'billing': {'street': '123 Fake St', 'city': 'Denver', 'state': 'CO', 'zip': '80202', 'country': 'US'},
    'shipping': {'street': '456 Real Ave', 'city': 'Boulder', 'state': 'CO', 'zip': '80301', 'country': 'US'}
}
# probe_batch('your_key_here', test_base)  # Uncomment for live

This spits heatmaps: e.g., at 0.15 noise, pass rates hit 65% on electronics verticals. For Riskified, fork to /api/v3/orders – responses now include "ml_confidence" (0-1 float, <0.3 auto-approves) and "risk_indicators" with sub-scores like "anomaly_velocity" (+0.2 for spikes). Forter? Their /trust/v1/validate ghosts synth data unless you embed a merchant_order_id from a seeded shop – use Selenium for full fingerprints (add AudioContext hashing for +8% mimicry).

Poisoning Deep Dive: From Seeding to Systemic Collapse (2025 Edition)​

Teasing your Part 2? Here's my full-stack playbook, battle-hardened against Q3 retrains. These black-box nets (e.g., Feedzai's ML fraud models) retrain on 10-15B points monthly, so target the data pipeline: inject "legit" noise to warp boundaries. Per Anthropic's Aug '25 report, fraudsters are embedding AI in ops – we're flipping it. Persistence via low-volume, high-fidelity attacks; aim 2-5k injections/mo to evade anomaly detectors (they flag >3% merchant deviation).
  1. Cluster Seeding (Warm-Up Phase): Micro-txns ($0.99-9.99) x 10-20 across 4-6 merchants (e.g., BestBuy clones). Clean footprints: 911.S2 proxies ($3/GB, 99% resi), aged Gmails via BulkServices ($0.05/each), consistent fingerprints (FingerprintJS Pro spoof, $99/mo). Builds graph clusters – SEON's "user_risk" decays 40% after 10 hits; Forter's trust_score climbs to 85+ (from 55). Track via dashboard: Watch "historical_fit" (+15 over 14 days).
  2. Ramp & Mimicry (Escalation): Week 1: $15-75 baskets, inject cart abandons (API /abandon POST) for "hesitation" behavioral hooks. Week 2-3: $200-1k, simulate returns ( /refund with partials) for loyalty signals. 2025 twist: Mimic post-PSD3 norms – add "sca_compliant" flags (true, with fake 3DS2 cryptograms gen'd via OpenSSL). Behavioral exploits: Clone patterns from logs (e.g., login spikes at 9AM EST), per X threads on AI mimicry.
  3. Adversarial Injection (Core Poison): Reverse-gradient descent – use GANs (HuggingFace's AdversarialRobustness toolbox, free) fine-tuned on PaySim + your logs. Gen variants: Perturb IP geos ±75km (dodges location_velocity), timestamp jitters ±300s (breaks bot rhythms), or embed adversarial noise in UA strings (e.g., append invisible Unicode to evade regex). Submit via SOCKS5 farms (ProxyRack, $50/1k ports). For Forter's trust_score (a gradient-boosted tree per leaks), target "trust_decay" by poisoning with 80% clean + 20% edge-case txns – models learn to underweight red flags. X buzz confirms: Gradient attacks max confusion in fraud nets. Data poisoning specifics: Mix deceptive datasets (e.g., "legit" high-vel txns from breached Chase logs) to corrupt training – HiddenLayer calls this the "toxic data" vector, compromising 30% of models undetected.
  4. Propagation & Amplification: Federated sharing (Forter's 1.2k clients) means one cluster poisons 15-25% downstream. I've seen warmed BINs approve +35% on affiliates post-3 weeks. Amplify with decoys: Burn $1k in high-risk probes (e.g., VPN chains) to dilute signals. New '25 meta: AI-led micro-fraud (Lucinity report) – sub-$5 txns at 1k/hr to flood retrains.
  5. Evasion Stack: Tor + Mullvad VPN for calls ($5/mo), key rotation q36h (cron + Lambda, free tier). Monitor retrains: Scores spiking? Pivot seeds. Defenses rising: Zscaler's Zero Trust AI wrappers block 70% adversarial inputs. Counter with prompt jailbreaks on their internal LLMs (if dashboard-exposed).

2025 Risks & Horizon Scan​

PSD3's bio mandates (iris + gait via phone cams) nuke synth tests; Stripe's v2 ML sips gateway data direct, less federated vuln. Over 15k txns? FBI's AI taskforce (post-Equifax 2.0) subpoenas via Chainalysis – OPSEC: Tails 6.1 + Monero/ Wasabi ($0.003/kB), no fiat trails. Trends: AI paradox – deepfakes up 200% in SIM swaps, but detection accuracy at 92% with ensembles (SuperAGI). Nullcon Goa '26 has AI sec training – worth a ghost attend for fresh vectors.

Carder, Part 2 drop ETA? Forter gradients or Riskified ensembles? Fresh logs/SEON keys? PMs open – let's forge the next wave. Stay shadows.
 
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