CVE公開前の脅威検知脆弱性が公開される前に悪意あるアクティビティを識別した10件の事例

DarktraceはAI駆動の異常検知を利用してCVEが公開される前にサイバー脅威を識別することができます。動作のパターンを分析することにより、Darktraceは組織がゼロデイエクスプロイトを初期段階で検知し封じ込めるのに役立ちます。このプロアクティブなアプローチにより、国家レベルの脅威アクター、ランサムウェアギャング、そして脅威ランドスケープ全体にわたり進化し続ける脅威に対してサイバーセキュリティ体制を強化することができます。
Inside the SOC
Darktrace cyber analysts are world-class experts in threat intelligence, threat hunting and incident response, and provide 24/7 SOC support to thousands of Darktrace customers around the globe. Inside the SOC is exclusively authored by these experts, providing analysis of cyber incidents and threat trends, based on real-world experience in the field.
Written by
Nathaniel Jones
VP, Security & AI Strategy, Field CISO
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02
Jul 2025

CVEの追跡だけでは不十分:コンテキストがきわめて重要である理由

脆弱性とは、攻撃者が不正にアクセスを取得したり、正常なオペレーションを妨害したりするために悪用することのできる、システム内のウィークポイントです。CVE(Common  Vulnerabilities and  Exposures)とは、公開されているサイバーセキュリティ脆弱性のリストであり、サイバーセキュリティコミュニティはこれを追跡してリスクを緩和します。

脆弱性が発見されると、標準的な手順としてはこれをベンダーまたは対応する組織に報告することにより、彼らはパッチまたは修正を作成して配布し、その後詳細を公開するというものです。これは、責任ある開示と呼ばれている方法です。

2024年には記録を塗り替える40,000件のCVEが報告され、Forum for Incident Response and  Security Teams (FIRST) によれば2025年にはそれを上回る件数が予測されている[1]  なかで、異常検知はこれらの潜在的リスクを識別するために不可欠です。ゼロデイのエクスプロイトと脆弱性の公開の間のギャップはかなり大きい場合もあり、ネットワーク上でエクスプロイトが行われていないかを遡及的に見つけ出そうとすることは、特にシグネチャベースのアプローチをとっている場合非常に困難です。

CVE公開に頼ることなく脅威を検知

普段とは異なるログインのパターンやデータ転送など、ネットワークやシステム内で発生した異常な動作は、サイバー攻撃が試みられている、内部関係者による脅威、あるいはシステムが侵害されている兆候である場合があります。Darktraceはルールやシグネチャに依存しないため、問題のデバイスまたはアセットについての完全なコンテキストがなくても、異常から悪意あるアクティビティを検知することができます。

たとえば、昨年末のFortinetに対するエクスプロイト攻撃発生時に、Darktraceの脅威リサーチチームはさまざまなFortinet脆弱性のエクスプロイト、特にCVE  2024-23113について調査していました。その頃MandiantがCVE  2024-47575に関するセキュリティアドバイザリを発行しましたが、その内容はDarktraceの調査結果と非常によく一致していました。

Darktraceの脅威調査チームはこのような回顧的分析によりさまざまな検知結果を広範な脅威ランドスケープに照らして理解し、さらなるコンテキストを追加するために利用しています。

以下は、脆弱性が公開される何日も前、場合によっては何週間も前にDarktraceが検知した昨年の10件の事例です。

ten examples from the past year where Darktrace detected malicious activity days or even weeks before a vulnerability was publicly disclosed.

CVE公開前のエクスプロイトの傾向

多くの場合、エクスプロイトされた脆弱性の開示は、高度な脅威アクターによるゼロデイを使った侵害に対する、インシデント対応調査の結果として行われます。脆弱性が登録され、エクスプロイトされたことが公表されると、攻撃者と防御者による攻撃  vs. パッチの競争が始まります。

高いスキルと豊富なリソースを持った国家アクターは、その目的を達成するためにさまざまな能力を駆使することで知られていますが、それにはゼロデイの利用も含まれます。多くのケースで、CVE公開前のアクティビティはローアンドスロー型で数か月も継続し、オペレーションの安全性は高い傾向にあります。CVE公開後は参入障壁が下がり、よりスキルの低い、リソースをあまり持たない攻撃者、たとえばランサムウェアギャングのようなグループでもその脆弱性を悪用することができ、大きな被害が発生します。エクスプロイトされた脆弱性の公開前、公開後において、異なる2つのタイプのアクティビティがみられることが多いのはそのためです。

ダークトレースはこの一連の流れを、昨年、前述のFortinetおよびPAN  OS脅威アクターによる攻撃のいくつかにおいても確認しています。国家アクターによる脆弱性のエクスプロイトが見られた後、ランサムウェアギャングが多くの組織に被害をもたらしていました  [2]

今年の春発生した、中国の脅威アクターが関係するSAP  Netweaverエクスプロイトでも、それに続いてランサムウェアインシデントが観測されており、同じ傾向がみられます[3]

自律遮断

異常ベースの検知は、CVE公開前であっても悪意あるアクティビティを識別できるという利点があります。しかし、セキュリティチームにはすばやく封じ込めアクティビティを隔離するという仕事が残っています。

たとえば、2025年前半に起こったIvanti連鎖エクスプロイト事案において、ある顧客は自社ネットワーク上でDarktraceの自律遮断機能を有効に設定していました。その結果、Darktraceは内部の接続をブロックし、影響を受けたデバイスに対して「生活パターン」を強制することにより、疑わしい接続をシャットダウンして攻撃を封じ込めることができました。

このDarktraceによる検知および対処はCVE公開の11日前に実行されており、異常ベースのアプローチの利点を実証しています。    

一部のケースでは、Darktraceがデバイスに対する悪意あるエクスプロイトを脆弱性が公開される数日前に阻止したことが報告されています。

たとえば、ConnectWiseに対するエクスプロイト攻撃発生時、ある顧客において、リモートアクセスを介して悪意あるソフトウェアがインストールされたことをDarktraceが検知しました。さらに調査を進めると4台のサーバーが影響を受けていることが判明し、その間、自律遮断機能がアウトバウンド接続をブロックし、影響を受けたデバイスに対して生活パターンを強制しました。

シグネチャを超えて:CVE公開前に異常を見つける

動作パターンを分析し続けることにより、ユーザー、システム、ネットワークから通常と異なるアクティビティを見つけ出し、セキュリティ侵害かもしれない異常を検知することができます。

継続的な監視とこれらの動作からの学習を通じて、異常ベースのセキュリティシステムは、従来のシグネチャベースのソリューションでは見過ごされてしまうかもしれない脅威を検知することができ、同時に脅威のTTP(Tactics,  Techniques and  Procedures)についての詳細な情報を提供することができます。このようなビヘイビアインテリジェンスによりCVE公開前の検知が可能になり、より適応性の高いセキュリティ体制の構築、および変化し続ける脅威ランドスケープに応じたシステムの進化が可能になります。

Darktraceの自己学習型AIアプローチ

10年以上にわたりサイバーセキュリティAIをリードしてきたDarktraceは、適切なAIを組み合わせて最適な結果を得るための専門技術を有しています。Darktraceの自己学習型AIは多層的なAIアプローチを使用して、それぞれの組織から学習することにより、脆弱性が公開される前、多くの場合何日も、あるいは何週間も前に、悪意あるアクティビティを検知し対処することができます。

機械学習、深層学習、LLM、自然言語処理を含む多様なAIテクニックを戦略的に組み合わせ、連続的、階層的に統合することにより、Darktraceの多層的AIアプローチはそれぞれの組織専用の、変化する脅威ランドスケープに適応する強力な防御メカニズムを提供します。

ベイズ学習やビヘイビアクラスタリングといったテクニックを用いて、Darktraceはさまざまなモデルを適応的に評価し、エンティティの動作を正確に理解することが可能です。このビヘイビア分析のレイヤーにより、特定のデバイスやシステムからのまばらなデータであっても、類似のエンティティの持つパターンを検知し動作を予測することが可能になります。AIはこの基準枠を絶えず調整し続け、動的な環境での有効性を維持します。

DarktraceのAIについてさらに詳しく知るには、サイバーセキュリティに対するAIのさまざまな応用を解説した AI  Arsenal (多層的AI装備)ホワイトペーパーをご覧ください。

参考資料:

  1. https://www.first.org/blog/20250607-Vulnerability-Forecast-for-2025
  2. https://cloud.google.com/blog/topics/threat-intelligence/fortimanager-zero-day-exploitation-cve-2024-47575
  3. https://thehackernews.com/2025/05/china-linked-hackers-exploit-sap-and.html

関連するDarktraceのブログ:

*顧客による報告後確認されたもの

**2024年1月に更新されたブログは最新データを反映

This report explores the latest trends shaping the cybersecurity landscape and what defenders need to know in 2026.

This report explores the latest trends shaping the cybersecurity landscape and what defenders need to know in 2026.

Inside the SOC
Darktrace cyber analysts are world-class experts in threat intelligence, threat hunting and incident response, and provide 24/7 SOC support to thousands of Darktrace customers around the globe. Inside the SOC is exclusively authored by these experts, providing analysis of cyber incidents and threat trends, based on real-world experience in the field.
Written by
Nathaniel Jones
VP, Security & AI Strategy, Field CISO

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May 28, 2026

From Efficiency to Exposure: How AI Adoption Is Creating Unseen Vulnerabilities on the Factory Floor

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How AI agents impact the manufacturing industry

Security teams and IT personnel across the manufacturing industry are under constant pressure to protect production, maintain uptime, and safeguard critical assets but the rise of AI is bringing huge new opportunities alongside new cyber risks. Across manufacturing, AI is embedded into workflows, decision-making, and increasingly, autonomous AI agents are acting on behalf of employees and systems.  

Agentic systems are powerful because they can act independently, but that same autonomy also creates cyber and operational risk. Agents have extensive permissions and are capable of carrying out complex tasks, making decisions, and interacting with tools or external systems with little to no human intervention.

Unlike traditional AI models that perform predefined tasks, AI agents use advanced techniques to mimic human decision-making processes, dynamically adapting to new challenges, making decision and taking action based on their own judgement. They look like employees operationally but lack judgment, ethics, or fear of consequences like humans do. This means they can be easily manipulated by cybercriminals, and an AI agent embedded across an OT network creates threats that extend well beyond data exposure. For example, at BMW, AI identifies faults in welding processes as they occur. At its Spartanburg plant, AI monitors the weld of 300-400 metal studs onto every SUV frame to detect misplaced or faulty studs and correct them instantly. Corruption of BMW’s AI system could lead to catastrophic quality control errors.

Adopting agentic AI systems across manufacturing raises some concerns across security teams. New data from our State of AI Cybersecurity survey shows that 78% of manufacturing security professionals are worried about employee use of AI agents – their top concern. That’s followed by employee use of generative AI tools like CoPilot and ChatGPT, a worry for 76% of security professionals at manufacturing organizations. As these tools gain more access to business data and processes, and more autonomy within organizations, security teams, who today have minimal visibility of agent activity in their environments, increasingly have sensitive data exposure (a worry for 60%) and accidental policy and regulatory violations (59%) on their minds.

External AI-powered threats are evolving just as quickly

The same capabilities transforming manufacturing are also reshaping cyberattacks.

AI is enabling attackers to automate reconnaissance, refine targeting, and adapt in real time. What once required time and manual effort can now be executed continuously and at scale. Manufacturers are already seeing the impact. According to manufacturing security professionals we surveyed, 76% are already being impacted by AI-powered threats and 90% see AI increasing the success of social engineering attacks.

And the techniques themselves are evolving. Concerns across the manufacturing sector show growing anxiety about the range of AI-powered attack routes, most pressingly of adaptive malware that evolves in real-time – a prospect half (49%) of manufacturing security professionals we surveyed are worried by, a full 9% more than the average across industries. AI adaptive malware is followed by:

  • Automated vulnerability scanning and exploit chaining (48%) which has become even more pressing as Anthropic’s new Mythos AI Model supercharges vulnerability discovery
  • Hyper-personalized phishing campaigns (46%), which remain a mainstay in hackers’ arsenals, and AI has amplified their effectiveness by making phishing emails more convincing and harder to detect.

This is not just an increase in volume, it is a shift toward threats that evolve as they unfold - often faster than static defenses can respond.

Despite rising awareness, many manufacturers are not yet equipped to manage this shift. More than half (51%) say they are not adequately prepared for AI-driven threats, and only 37% have formal policies governing AI deployment.  

Securing AI through visibility, context, and guardrails

Addressing this challenge does not require manufacturers to slow innovation. It requires a different approach to security, one that can operate at the same speed and scale as AI. Three specific priorities are emerging for manufacturers looking to take advantage of the power of AI.

Visibility is foundational.  

Organizations need to understand where AI is being used, what it can access, and how it behaves across both IT and OT environments. Without that, risk cannot be measured or managed. It is no surprise that Darktrace’s research found that 91% of manufacturing security professionals said that they need to understand how AI makes decisions before trusting it. This is even more critical in operational settings where disruption has safety, environmental, financial, and reputational impacts.

Context is what turns visibility into action.  

In environments shaped by AI, normal behavior is constantly shifting. Detecting threats requires a behavioral approach; understanding patterns of life across the organization and identifying subtle deviations in real time – a step change in organizations’ traditional approach to security and risk management.

Guardrails ensure that agency does not become exposure  

As AI systems take on greater responsibility, organizations need clear boundaries around what they can do and when they can act independently. These controls must be embedded into systems themselves, not applied after the fact.  

Securing AI Agents Across Manufacturing IT and OT

The rise of agentic AI is transforming manufacturing - powering next-generation operations while reshaping the security landscape. This is not just an increase in threats, but a shift to autonomous systems, continuously evolving behaviors, and risks moving at machine speed. For organizations trying to grapple with the challenge of enabling AI while managing the risk, visibility, context and guardrails should be foundational.

Darktrace helps manufacturers build secure AI approaches by making those foundations possible. It provides visibility and real-time detection and response to unusual activity across IT and OT environments and allows organizations to understand AI activity from the prompts employees use and the agents they build to how those agents are behaving across the environment. For manufacturers scaling AI, this delivers a foundation for innovation without sacrificing control.

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Oakley Cox
Director of Product

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May 28, 2026

How to Evaluate AI Vendors: 5 Key categories for AI Adoption

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Understanding the AI buyers’ market

AI adoption has become a central topic of discussion in boardrooms, drawing growing interest from business leaders. Ultimately, organizations hope that an investment in AI technology will have tremendous returns. However, the process of buying an AI solution is not as straight forward as it appears on the surface.  

While business leaders may be eager to improve productivity across their operations, practitioners responsible for evaluating and selecting AI solutions may not always have the visibility or technical understanding needed to make the right decisions for their business. What is typically marketed as a holistic solution to their most critical problems is usually followed by uncertainty when AI tools are finally operationalized in real environments.

This guide is intended to support security leaders who are under growing pressure to adopt AI tools while navigating complex terminology, vendor claims, and increasingly crowded buying cycles. Ultimately, the goal is to help organizations evaluate and adopt AI in a safe, effective, and well-governed way. To support this, we’ve structured the evaluation framework across five key categories:

  1. Governance, safety, and data controls
  1. Data gathering and training
  1. Model and technique choice
  1. Performance and accuracy validation    
  1. Interpretability, adjustability, and transparency    

What buying AI looks like in cybersecurity

While investing in AI can bring immense benefits to your security team, first-time buyers of AI cybersecurity solutions may not know where to start. They will have to determine the type of tool they want, know the options available, and evaluate vendors. Research and understanding are critical to ensure purchases are worth the investment.  

With acceleration in AI adoption, accompanied by the recent boom in agentic AI and autonomous agents, CISOs must look “beneath the hood" of these tools to understand how they work, how they are governed, and to ensure the system is secure and compliant with internal policies.

Challenges in the AI buyers’ marketplace  

The AI security software market is buzzing with hype and flashy promises, which, understandably, needs to be addressed with due diligence. Potential buyers, especially in the cybersecurity space, are hesitant when it comes to allowing AI autonomous capabilities across their workflows, and a lack of vendor transparency can exacerbate those feelings.  

Reinforcing this sentiment, research from this year's Darktrace’s State of AI Cybersecurity report shows where confidence and hesitancy emerge amongst potential buyers. On the one hand, security professionals agree that they have good visibility into the logic and reasoning processes their AI solutions use. However, they lack the explainability and trust to allow AI to take independent remedial action.

  • 89% say they have good visibility into the reasoning behind the outputs generated by AI solutions
  • 92% say they need to understand how a defensive AI tool makes decisions before they can trust it
  • Only 14% say they allow AI to act independently, performing autonomous actions without human approval
  • 74% say they are limiting the autonomy of AI taking action in their SOC until explainability improves

Given the desire for trust and explainability we are seeing from buyers, it's important for them to be equipped with the right questions to ask vendors during an assessment or POV of AI tools in order to demystify marketing hype from real operational outcomes.

Below is a list of categories in which buyers can assess AI vendors or AI Service Providers (AISPs) to help reach safe adoption and maximize their ROI.  

5 categories of AI vendor assessment

Darktrace groups these AI-related questions into 5 categories: governance, data and training, model and technique choice, performance validation, and interpretability and adjustability. By asking questions regarding each of these 5 categories, buyers can gain a deeper understanding of how an AISP’s systems work and whether they suit their business requirements.

Governance, safety, and data controls

Governance of AI systems is critical for all AISPs. Whether their platform is based around a single model, or is a more complex, composite AI solution, strong governance is essential to ensure the system is safe, robust, and reliable.

A simple question you could ask is:

What AI governance policies and frameworks do you follow, and/or certifications do you currently maintain?

For more questions you can ask vendors, download the full guide here.

Darktrace is certified to the ISO/IEC 42001 standard, the world’s first AI Management System (AIMS) standard. ISO/IEC 42001 addresses the unique ethical and technical challenges AI poses by setting out a structured way to manage risks such as transparency, accuracy, and misuse. This includes a commitment to ethical AI development, and effective management and monitoring of AI systems both prior to and continually after release.

Data gathering and training

Accurate, meaningful, and unbiased data gathering is the first important step in producing any AI system. An AI model trained using inaccurate, unbalanced, or poor-quality training data will fail to perform optimally.

To alleviate concerns regarding training data quality, a question you could ask is:

What steps do you take to prevent bias in your AI models and training data?

For more questions, download the full guide here.

AISPs should be able to provide information about the steps taken, workflows followed, and auditing performed to reduce AI bias where appropriate. While it’s sometimes impossible to fully remove bias from an AI model, appropriate actions should be taken to mitigate or reduce bias where relevant.

Model and technique choice

Different AI techniques are optimal for different tasks. For example, research from Gartner suggests that relying on a single “one-size-fits-all" model can lead to data gaps, especially in highly specialized domains.

To achieve more accurate and robust AI solutions, AI leaders should move beyond using just one model or technique, embrace composite AI practices, and adopt a holistic AI system perspective.

A straightforward question you could ask is simply:

What type(s) of AI model(s) do you utilize in your solution?

For more questions, download the full guide here.

While specific detailed information about custom systems used by AISPs is likely proprietary, buyers should expect vendors to be able to provide an overview of the broad techniques used. This will allow you as a buyer to determine if the type of model is appropriate for your use case.

Performance and accuracy validation  

Testing and evaluation of performance is essential for all AI systems. Performance analysis should be performed both before release and continually after release to identify potential data or model drift.  

A question you could ask to understand an AISPs testing workflow is:

How do you audit, test, evaluate, verify, and validate your AI model outputs?

For more questions, download the full guide here.

Testing workflows will likely vary depending on the type of model – measurements relevant to one system may not always be relevant to others. Assessment of systems should also extend beyond these standard accuracy and robustness tests, and should also feature physical performance, such as latency and resource consumption.  

Interpretability, adjustability, and transparency  

AI systems are typically a black box, simply providing an output without an explanation of how that output was attained. Interpretability and transparency are critical to ensure that both SOC teams and end-users trust the outputs of a system to be accurate and meaningful.

A question you could ask is:

How do you promote a trust relationship between human analysts and AI outputs?

For more questions, download the full guide here.

In the context of cybersecurity, trust and interpretability are even more essential. This is particularly relevant for generative AI-based systems (including most AI Agents), where the risk of hallucination can reduce trust in responses.

Cybersecurity systems often need to perform autonomous actions to block incoming threats – an email filtering system may hold potentially dangerous emails; a firewall may block malicious inbound connections. If SOC teams can’t trust these systems to perform accurately, these systems may be limited or disabled, critically reducing their defensive power.

Darktrace as an AI-native cybersecurity vendor

Darktrace has been building and applying AI in cybersecurity for over a decade, developing its capabilities alongside an increasingly complex and fast‑moving threat landscape. This experience has resulted in a mature, multi-layered approach to AI, which continuously learns the normal patterns of each organization to understand behavior, interpret context, and identify meaningful deviations — without relying on predefined rules or known attack signatures. Over time, this has enabled a proven behavioral understanding that helps uncover subtle signals of risk that may otherwise be missed.

With the backing of our ISO/IEC 42001 certification, stakeholders, customers, and partners can be confident that Darktrace is responsibly, ethically, and safely developing its AI systems, and managing the use of AI in day-to-day operations in a compliant and secure manner.  

Explore the principles behind Darktrace’s responsible AI approach, informed by collaboration with global experts in academia and governments, detailing how accountability, explainability, and continuous validation are built into its cybersecurity technology.

How Darktrace secures AI systems

Darktrace now brings these capabilities to monitor and respond to risk generated from AI systems across organizations with Darktrace / SECURE AI. This solution analyzes how prompts, agents, and systems are used within the context of each organization, bringing every AI interaction into a single view. This unique approach helps teams understand intent, assess risk, protect sensitive data, and enforce policy across both human and AI agent activity.

Stay up to date

Sign up for the Secure AI Readiness Program here: This gives you exclusive access to the latest news on the latest AI threats, updates on emerging approaches shaping AI security, and insights into the latest innovations, including Darktrace’s ongoing work in this area.

Ready to talk with a Darktrace expert on securing AI? Register here to receive practical guidance on the AI risks that matter most to your business, paired with clarity on where to focus first across governance, visibility, risk reduction, and long-term readiness.  

Further Reading on AI in cybersecurity

When deciding to invest in an AI solution, it’s important to understand what this means for you and your organization. The questions presented here are only a starting point in understanding an AI solution and whether it is appropriate for your use case.  

Gain deeper knowledge on applications of AI in cybersecurity and Darktrace’s multi-layered AI in the AI Arsenal White Paper.

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Jamie Bali
Technical Author (AI) Developer
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