Real-Time Threat Monitoring for Blockchain via 7Block Labs

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“Our alerts fire, but we still find out from Twitter”

You’ve got your SIEM set up, an enterprise pager rotation in place, and a solid SOC 2 roadmap ready to roll. But here’s the deal: on-chain risk plays by a whole different set of rules compared to Web2:

• When it comes to exploits, things happen in a blink. Malicious bytecode gets deployed, funded, simulated, and executed way quicker than you can get your manual triage process going.
• Now with ERC‑4337, smart accounts are sending signed UserOperations into a different mempool. If you don’t have the right monitoring set up, you might miss out on fraud, spam, and abuse by paymasters before they actually get included. Check out more about it here.
• Those Defender-style sentinels you’ve been counting on? They’re on the move. With migrations and coverage gaps popping up, you could find yourself facing blind spots just when you need reliable automation the most. For more info, head over to this blog post.
• Compliance is getting serious about requiring SOC 2 evidence that shows you can consistently detect, respond to, and document incidents across your entire on-chain stack -- and a simple dashboard screenshot just isn’t going to cut it. The NIST IR guidance has changed, so your playbooks need to align with the new CSF 2.0 lifecycle. If you're curious, you can read more about this here.

Result: late-night escalations, on-call burnout, and that leadership question you really can’t escape -- “What’s our MTTR on-chain, and how does it line up with our SOC 2 controls and SLAs?”

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The cost of minutes: MTTR, audit findings, and real dollars

• In a lot of DeFi situations, there's a “rescue timeframe” that kicks in -- it's basically the window between when a malicious contract is deployed and when the first exploit call happens. This window often gives you a chance to act, but only if your system is smart enough to pick up on pre-exploit signals and kick off an automated response that's been approved by your policies. According to Forta’s research, we've got an average rescue window of about an hour for protocol-layer incidents, with some key pre-exploit signals showing up just minutes to an hour before any losses are incurred. If you miss that window, what could’ve been a contained anomaly turns into a serious incident. (forta.org)
• ERC‑4337 brings new DoS and front-run threats right at the mempool layer. When you see an uptick in rejected UserOps, simulation failures, or weird gas variations, those are your red flags that something's about to go south for your users. If you’re not tracking UserOp telemetry and getting alerts about bundler health, you’re just going to find out about a poor user experience or a policy being bypassed once it’s already happened. (docs.erc4337.io)
• When it comes to procurement and GRC, you really can't overlook SOC 2 controls (which cover security and availability). You need to back up your claims with actual data, not just words. The AICPA’s Trust Services Criteria updates are all about monitoring risks, handling incidents, and collecting evidence. If you don’t show that you’re continuously monitoring your on-chain systems, that’s a totally avoidable finding in an audit. (aicpa-cima.com)
• Keep in mind, sanctions exposure is a “zero-miss” thing for enterprises. You need solid on-chain and off-chain screening that gives you clear, auditable outcomes right when you make a call -- no more of that “best effort” stuff at the UI edge. (auth-developers.chainalysis.com)

Missing deadlines here isn’t just about lost funds; it also means pushing back delivery dates, missing SLAs, and dealing with SOC 2 exceptions that can really slow down your roadmap and send it back to committee for more discussions.

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7Block Labs’ real-time threat monitoring, built for enterprise constraints

Our approach is all about being technical when it really counts, and easy to audit when it matters most. We kick things off with a 90-day pilot that fits right into your existing setup, and then we scale it up from there.

1) Threat-model the actual code and business flows

We track all your deployed and active contracts, the L1/L2 network landscape, ERC‑4337 components, relayers, custodial connections, and any cross-chain dependencies:

• Inventory: We’ve got the contract ABIs/bytecode, privileged roles, pause paths, guardians, timelocks, multisig policies, and upgrade beacons all lined up.
• Transaction types: Here’s what we can do: mint, burn, pause, permit, permit2, setApprovalForAll, updates from the oracle, rebalancing, withdrawals, and bridge interactions.
• 4337 stack: Check out the EntryPoint, bundler(s), paymaster(s), alternative mempool routing, simulation infrastructure, and UserOp KPIs. For more details, swing by erc4337.io.

Output: a detailed attack surface map that connects to data sources and automated controls, perfect for SOC 2 evidence and serving as a foundation for Procurement.

2) Instrumentation -- on-chain, mempool, and enterprise tooling

We set up a cool layered telemetry system that's not only built for the chain but also plays nice with your SOC:

• Forta-based detection: We’ve got a mix of curated bots like Attack Detector, Asset Drained, and Anomalous Transfers, along with some custom bots that combine heuristics and machine learning to spot patterns before an exploit happens. Plus, we subscribe to detection feeds and funnel those signals right into your SIEM/SOAR. Check out more details here.
• Pre-exploit simulation: We can simulate suspicious transaction or user operation paths against a forked state to ensure we're only promoting alerts that are “high-confidence and action-worthy.” This approach helps cut down on false positives while still keeping response times to a minimum. Learn more here.
• 4337 observability: We take in User Operation lifecycle metrics--like ingress rate, validation failures, inclusion latency, simulateValidation revert classes, and gas deviation--and keep tabs on bundler liveness. If we spot any weird spikes in rejections, paymaster drift, or inclusion delays that go beyond our service level objectives (SLO), we’re on it! Dive deeper here.
• Sanctions screening: We enforce both off-chain API screenings and on-chain oracles when calls are made. Our approach is all about solid “allow/deny/challenge” policies--complete with evidence artifacts and overrides--leveraging the Chainalysis API + Oracle across EVM networks. Get the scoop here.
• Enterprise integrations: We route structured alerts straight to Splunk, Datadog, or PagerDuty. We also make sure to preserve immutable evidence in your data lake but keep personal identifiable information (PII) to a minimum. Alerts get mapped to playbooks that outline responder roles. OpenZeppelin integrations will be supported through 2026, with a plan to migrate to the open-source Monitor/Relayer where it makes sense. Find out more here.

Where it fits:

• Create Bot/Monitor components using our web3 development services.
• Set up SIEM/SOAR and data infrastructure with our blockchain integration.
• Strengthen contracts and upgrade paths through our security audit services and smart contract development.

3) Detection engineering -- signal over noise

We’ve got a solid ruleset and ML features that really capture how attacks play out in real life:

• Bytecode-centric indicators: Look out for unverified contracts that are chatting with your registry, any opcodes that seem fishy--especially those tied to delegatecall/proxy misuse--and keep an eye on any suspicious initcode patterns.
• Behavior-centric indicators:
  • Be wary of sudden jumps in ERC‑20 approvals directed at non-whitelisted routers.
  • Watch for privileged function calls happening outside of maintenance windows.
  • Changes in liquidity pool parameters that don’t have governance signals can also be a red flag.
  • Keep an eye on 4337 oddities: bursts of validation failures by class (signature/paymaster/initCode), out-of-band gas price quotes, and strange paymaster sponsorship patterns.
• Cross-signal combinations: Follow the money trail--from mixers to contract deployment, then on to privileged call attempts and liquidity drains. Correlate these across Forta’s “lego” bots to enhance accuracy. (forta.org)

We adjust settings for each environment and demonstrate value by setting false-positive budgets that we agree on with the security team.

4) Automated, reversible response

Automation is super useful, but only if it's safe to use in production and can be tracked for Governance, Risk, and Compliance (GRC) purposes. Here’s what we do:

• We've got “emergency pause” and “rate-limit” controls set up with some focused guardians. Our approach is progressive: we start with alerts, then block risky function paths, pause specific modules or markets, and if needed, we can go for a global pause.
• For auto-responses related to 4337, we can temporarily throttle or bypass paymaster sponsorship, switch to private submission for sensitive UserOps, rotate bundler endpoints, or even cut down on traffic during a DoS attack.
• When it comes to enforcing sanctions, we have on-chain denylist checks that control entry points for contracts. Plus, we run off-chain preflight checks that consistently block UI flows and custodial rails. Check it out here: (auth-developers.chainalysis.com)
• As for evidence, every automated decision we make generates an immutable log along with an auditor-friendly JSON fact set that lines up with SOC 2 criteria.

5) Compliance alignment -- SOC 2 and NIST CSF 2.0

We turn your on-chain controls into artifacts that are ready for attestation:

• Get your map alerts and playbooks lined up with the AICPA 2017 TSC focusing on Security and Availability. Make sure to use the updated points of focus and whip up those monthly evidence packets for your auditor. You can check it out here: (aicpa-cima.com).
• Make sure your incident response phases match up with the NIST SP 800‑61 Rev 3 (CSF 2.0 profile). This way, your incident response documents and retrospectives will be in sync with the latest guidance. For details, head over to (csrc.nist.gov).

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Architecture at a glance

• Chains: You've got Ethereum's L1, along with Base, Optimism, and Arbitrum. Don't forget about Polygon PoS & zkEVM, BNB Chain, Avalanche, and the testnets, too.
• Data planes:
  • Realtime: We're talking about mempools (that’s tx + 4337 UserOps), fresh blocks, event logs, and traces.
  • Batch/forensics: Here’s where archive nodes, forked state re-simulations, and sanctions snapshots come into play.
• Control planes:
  • Contract-level: This covers pausables, circuit breakers, role-gated rescues, and timelocked upgrades.
  • 4337: Keep an eye on the bundler fleet health, paymaster policy engine, and entry point metrics.
  • Compliance: Think Chainalysis API/Oracle deny/allow, plus your exception workflows.

Our implementation kicks off with our blockchain development services and expands to cover multiple networks thanks to our cross-chain solutions development.

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Example A: “Approve-drain” protection with pre-exploit simulation

• Trigger: So, you have this newly deployed, unverified contract that’s trying to interact with your router. A bot catches some weird function selectors and off-the-charts Transfer events that raise an eyebrow.
• Bot flow: Here’s how it goes down: ML/heuristic Forta bots categorize the contract, and then a forked simulation takes a stab at executing the sketchy call path using the current state. This sim mimics a drain scenario, but without messing anything up on-chain. Check it out here: (forta.org).
• Response: Now, here’s how we handle it with a safe macro from SOAR:
  • First off, we freeze any extra approvals to that suspect address using a policy guard.
  • Next, we make sure to alert the security engineering team, complete with the simulation diff and calldata.
  • If everything checks out with business rules, we trigger a “module pause” on the affected market--keeping it targeted instead of hitting the global pause button.
• Evidence: Finally, all the actions taken, along with parameters and results, are documented as an auditor-ready artifact that lines up with CC7.x controls.

Result: “minutes, not hours” to manage, featuring reversible, scoped actions.

Example B: ERC‑4337 mempool stability and abuse detection

• Trigger: The anomaly detector spots a surge in simulateValidation reverts and a rise in inclusion latency for UserOps; meanwhile, paymaster quote deviations are on the upswing.
• Telemetry: Metrics are streaming in from bundler operators like Alto and your own nodes. We’re keeping an eye on KPIs such as rejected UserOps per second, bundle size, time to handleOps, and gas deviation.
• Response:
  • Switch to secondary bundlers if we notice any drop in liveness.
  • For the time being, limit sponsorship to whitelisted origins or put a cap on high-risk flows.
  • Send sensitive UserOps through a private relay path while we dig into the public mempool pressure. (Check it out here: docs.erc4337.io)
• Evidence: The incident timeline links UserOp metrics to how end users are affected, plus SOAR actions, wrapping up with root-cause insights for your postmortem analysis.

Example C: Sanctions compliance at call time

• Trigger: When an address tries to interact with your contract's entry point.
• Check: The on-chain Chainalysis Oracle gives back a “sanctioned” boolean; meanwhile, the off-chain API provides some extra context for dashboards and casework. (auth-developers.chainalysis.com)
• Response: The contract says no to the call; SOAR kicks in and opens a case, complete with solid evidence and prefilled info like the list, timestamp, address, chain, and transaction hash.
• Procurement/GRC value: This leads to clear enforcement with auditable logs, which meets enterprise policies and cuts down on the need for manual reviews.

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What we actually ship in 90 days

• Forta bots (both curated and custom) connected to your SIEM/SOAR and alert budgets.
• 4337 observability includes UserOp telemetry, bundler health checks, and a paymaster policy audit trail. We’ll take care of moving your OpenZeppelin Defender to Monitor/Relayer when needed. (blog.openzeppelin.com)
• Pathways for sanctions enforcement: on-chain oracle plus API gateway, all with evidence generation. (auth-developers.chainalysis.com)
• We’ve got runbooks and tabletop exercises ready for you: “approve-drain,” oracle manipulation scenarios, 4337 DoS attacks, and cross-chain delays.
• SOC 2 mapping pack that includes control descriptions, procedures you can test, and sample evidence, all lined up with AICPA TSC and NIST SP 800‑61 Rev 3. (aicpa-cima.com)

Tie-ins with Your Roadmap:

• Making those tough upgrades and refining role design through our security audit services.
• Creating smooth end-user application pathways with our dapp development.
• Expanding protocol coverage with our DeFi development services whenever the product scope calls for it.

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Best emerging practices we recommend now

• Treat ERC‑4337 like its own unique threat landscape. Keep an eye on the alt mempool, not just the transactions that are submitted. Be sure to set up alerts for any simulateValidation failures and watch out for any odd latencies in inclusion. This helps catch early signs of DoS attacks or fraud. (docs.erc4337.io)
• Mix up heuristic and machine learning detections--don’t just lean on one signal. Take a page from Forta’s “lego” approach, where bots subscribe to each other’s alerts. This really boosts precision. Definitely utilize it! (forta.org)
• Before escalating any incidents, run some pre-exploit simulations. This can really cut down on false positives and gives your response team solid calldata, expected state differences, and handy replayable artifacts. (forta.org)
• Get ready for the Defender sunset. If you’re relying on Defender Sentinels/Relayers, make sure to plan your migration to OpenZeppelin’s open-source Monitor/Relayer well ahead of July 1, 2026. Don’t forget to test parity and update your incident runbooks while you’re at it. (blog.openzeppelin.com)
• Make those sanctions checks predictable at contract boundaries. Pair up on-chain oracles with off-chain APIs for better case management and reporting. (auth-developers.chainalysis.com)

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GTM metrics -- how we prove value to engineering leadership and procurement

We make sure that our technical results connect with the business KPIs. When it comes to pilots, we suggest success metrics along with budget targets:

• Mean Time to Detect (MTTD): We're aiming for a target of under 60 seconds when it comes to high-confidence signals. The proof? We’ll look at things like the Forta alert timestamp, mempool detection, and the delta in SIEM ingestion.
• Mean Time to Respond (MTTR): Our goal here is to keep it under 5 minutes for any automated actions we have in place, like pausing, rate-limiting, or putting something on a denylist. We’re also making sure that these controls are reversible and that we’re tracking any business exceptions.
• False Positive Rate: Let’s keep this bad boy under 2% after we fine-tune things. We’ll show this through labeled alert sets that come from our simulation-based validation.
• Coverage: We’re on top of monitoring contracts, functions, and chains; we've got 4337 stack components all set up and ready to go. Plus, we’re enforcing sanctions paths.
• Compliance: This is all about how many SOC 2 evidence artifacts we generate per incident and each month. We’re mapping everything to the TSC CC7.x and making sure it lines up with the availability criteria as per NIST SP 800‑61 Rev 3 lifecycle. (aicpa-cima.com)

Procurement-Ready Packaging

• We’re kicking things off with a fixed-price 90-day pilot that includes some milestones and exit criteria to keep us on track.
• When it comes to the handover, we’ve got you covered with a solid SLA: expect runbooks, dashboards, alert budgets, and all the signed-off evidence packs you need.
• If you're interested, there’s also an option to extend this into a more comprehensive protocol or even explore cross-chain coverage through our cross-chain solutions development.

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Brief in-depth details -- what’s under the hood

• Node clients: A mix of archival and tracing nodes like Erigon, Geth, and Nethermind that are optimized for better event throughput. We use EVM debug_traceCall for those deep forensic replays.
• Bot runtime: We run containerized Forta agents that come with adjustable throttling and backpressure. Plus, we've got these “combiner” bots that subscribe to signals for sanctions and exploiters to help cut down on the noise. Check it out here.
• 4337 stack: Keep an eye on Alto or vendor bundlers along with your own instances. You can export KPIs like ingress, rejections per second, handleOps success, and gas deltas through Prometheus straight to your Grafana or Datadog. Find more details here.
• Compliance controls: We ensure that immutable evidence is stored in WORM storage. We also generate periodic SOC 2 evidence packets and maintain a change log of detection rules and auto-responses, all with reviewer sign-off. You can read more about it here.

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Why 7Block Labs

We combine hands-on engineering in Solidity, 4337, and Forta with a solid audit-grade process. The result? It's not just another dashboard; it’s a tangible decrease in incident impact that aligns with our SOC 2 and SLA commitments, all delivered on a schedule that procurement can get behind.

• Looking to make your contracts safer with some changes? Our smart contract development crew is here to help! We implement scoped guardians, circuit breakers, and role design--all while keeping your upgrade path intact.
• Want a streamlined way to combine alerts and actions across your Web2 and Web3 systems? Our blockchain integration team connects everything to Splunk/Datadog/PagerDuty with minimal hassle.
• Thinking about extending your coverage to include tokens, NFTs, or fresh L2s? Our solutions portfolio and web3 development services are designed to grow right along with your roadmap.

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References:

• OpenZeppelin Defender is winding down, but no worries! Migration to the open-source Monitor/Relayer will keep things operational until July 1, 2026. Check out the details in their blog post.
• There are some important security considerations to keep in mind with the ERC‑4337 alt mempool architecture and bundlers. You can read all about it on the ERCs site.
• Want to dive into the nitty-gritty of ERC‑4337 bundler monitoring? This includes everything from UserOp lifecycle to metrics for simulateValidation and handling operations. More info can be found in the documentation.
• Check out Forta's Attack Detector, which uses machine learning for pre-exploit detection and has clear rescue windows documented. Get the scoop on how it works here.
• For those into compliance, the Chainalysis sanctions screening API offers on-chain Oracle for deterministic enforcement. Get started with it here.
• If you’re looking to align incident response with CSF 2.0, take a look at NIST SP 800‑61 Rev 3 (2025). It’s got you covered! More details can be found on the NIST site.
• Finally, for SOC 2 evidence mapping, the AICPA 2017 Trust Services Criteria has revised points of focus for 2022. You can download that resource here.

Schedule a 90-Day Pilot Strategy Call

Ready to kick things off? Let’s chat! Booking a 90-day pilot strategy call is a great way to get us on the same page and dive into your goals. Just click the button below to grab a spot on my calendar.

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