インシデントレスポンスサービス：主な特徴と7つのトップクラスのソリューション

インシデント・レスポンス・サービスとは？

インシデントレスポンスサービスは、サイバーセキュリティの脅威や侵害への対処を支援するアウトソーシングチームへのアクセスを組織に提供します。これらのサービスは、攻撃が発生すると、セキュリティ・インシデントの管理、被害の最小化、システム機能の復旧を支援します。セキュリティ脅威の迅速な特定、緩和、文書化を実現します。

インシデントレスポンスの目標は、侵入直後に組織のITインフラストラクチャへのダメージを制御し、軽減することである。また、セキュリティ・チームは、インシデント処理と対応のプロセスを継続的に分析・改善することで、将来のインシデントに対する予防策を確立することができます。

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Understanding the Incident Response Services Market Trends

The incident response services market is projected to grow from USD 41.95 billion to USD 116.17 billion by 2031, with a compound annual growth rate (CAGR) of 18.52%.

Several factors are driving this growth: 

• Organizations are adopting cloud-first architectures
• Governments are introducing stricter data-protection regulations
• Cyber-insurance providers increasingly require companies to maintain incident response retainers. 

The market is also consolidating as cybersecurity platform vendors acquire managed detection and response (MDR) providers. This allows organizations to combine threat detection, investigation, and containment within a single service model.

Rising Cyberattack Sophistication

Cyberattacks have become faster and more disruptive, especially in sectors such as banking, finance, utilities, and critical infrastructure. Attackers now move quickly inside compromised environments, often stealing data or disrupting operations within hours or even minutes.

This trend has increased demand for containment-focused incident response services. Organizations need external responders who can isolate infected systems, revoke compromised credentials, and stop lateral movement before damage spreads further.

Modern attacks also increasingly target cloud infrastructure and identity systems. Threat actors use techniques such as OAuth token abuse and business email compromise (BEC) campaigns to bypass traditional security tools. As a result, organizations are prioritizing rapid identity remediation and cloud-specific response capabilities.

Regulatory and Compliance Pressure

Regulations are becoming a major driver of incident response investments. Laws and frameworks such as the European Union’s NIS2 directive, PCI-DSS 4.0, and regional privacy regulations require organizations to maintain formal incident response processes and meet strict reporting timelines.

Many organizations now need incident response partners that can support technical remediation alongside legal, compliance, and communication requirements. This includes evidence collection, breach reporting, forensic analysis, and coordination across multiple jurisdictions.

Shift Toward Managed Detection and Response

Managed Detection and Response (MDR) is one of the fastest-growing segments in the market. Organizations increasingly want continuous monitoring and proactive threat hunting rather than relying only on reactive incident handling.

MDR providers use AI-assisted analytics, automation, and threat intelligence to identify suspicious behavior earlier and reduce response times. Many services now include automated playbooks that accelerate investigation and containment processes.

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インシデント・レスポンス・サービスの主な特徴

インシデント対応サービスは、通常、以下の機能を提供する：

• 自動検知ツール：アルゴリズムや機械学習技術を使用して、潜在的な脅威や異常をリアルタイムで特定します。これにより迅速な対応が可能になり、攻撃者が損害を与える機会を減らすことができます。また、自動化されたシステムは、重大性と潜在的な影響に基づいてインシデントに優先順位を付けることができます。
• フォレンジック・ツールと技術：侵害の発生源と範囲を特定する。詳細な分析と調査を可能にし、データの回収、システムの脆弱性の分析、攻撃者の手法の特定を支援します。これは、インシデントを深く理解し、規制当局の監査や法的目的に役立ちます。
• 反復可能なプロセスと手順：セキュリティインシデントの管理における一貫性と有効性を確保する。これらのプロセスは事前に定義され、文書化されているため、インシデント対応チームがインシデントを処理する各段階をガイドする明確な枠組みが提供される。主な要素には、インシデントの検出、初期評価、封じ込め、根絶、復旧、インシデント発生後のレビューなどがあります。
• 迅速な封じ込め戦略：影響を受けたシステムを隔離し、攻撃の拡大を防止します。即座に隔離することで、ネットワークの中断を最小限に抑え、侵害の影響を軽減します。これには通常、侵害された領域へのネットワーク・アクセスをシャットダウンまたは制限する自動化プロセスが含まれます。
• システムの復元：インシデント解決後、影響を受けたシステムをネットワークに安全に再導入し、悪意のあるコードや脆弱性がないことを確認します。インシデント対応チームは、再暴露のリスクを冒すことなく、システムやデータをインシデント発生前の状態に復元します。多くの場合、リリース前に管理された環境でテストを行います。
• 根本原因分析（RCA）：セキュリティ侵害を可能にした根本的な問題を特定することを目的とする。根本的な問題に対処することで、将来の再発を防止する。この分析では、多くの場合、インシデントを最初から最後まで再検討し、技術やプロセスの欠陥を明らかにする。
• より広範なセキュリティ対策との統合：インシデント対応プロセスを全体的なITセキュリティ戦略と整合させ、組織の全レベルで一貫した保護を確保する。

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インシデント・レスポンス・サービス

主要なSIEMソリューションを提供するExabeamは、複数のインシデント対応サービスプロバイダーと提携しています。ここでは、インシデントレスポンスでお客様を支援するために当社が信頼しているプロバイダーと、その主なサービスの特徴をご紹介します。

1.グーグル マンディアント

Google Mandiant combines over two decades of incident response experience with real-time threat intelligence to help organizations prepare for, detect, and recover from cyberattacks. Services span preparedness, technical response, and crisis management, and are backed by a flexible retainer model that provides pre-negotiated terms and two-hour response times. 

• Incident response retainer: Provides immediate access to cybersecurity experts with pre-negotiated terms and two-hour response times, along with proactive services to strengthen defenses between incidents.
• Compromise assessment: Combines incident response experience with real-time threat intelligence to discover evidence of past or ongoing intrusions across an enterprise environment.
• Crisis communications: Supports organizations in responding effectively to multifaceted attacks, helping to safeguard stakeholders and mitigate reputational risk.
• Cyber defense assessment: Provides a clear understanding of defensive capabilities and delivers a prioritized roadmap for building a stronger, more resilient security program.
• AI security services: Evaluates the end-to-end security of AI systems (covering training data, models, and custom applications) and helps organizations leverage AI to augment cyber defense capabilities.
• Red team assessments: Emulate real attackers pursuing custom objectives, revealing complex attack paths that conventional assessments often miss.

2.オプティヴ

Optiv offers incident response and recovery services structured around three phases: discovery, mitigation, and response. Services cover the full lifecycle of an incident, from initial scoping through forensic documentation, with 24×7 availability. 

• Incident discovery: Assessment of affected systems to identify the nature and scope of a compromise, including containment of persistent attacks and malware.
• Incident rapid response (IRR) program: A structured approach to identifying root causes and determining where gaps in the security program contributed to the incident.
• Incident response advising: Guidance on recovery steps and security improvements, delivered alongside hands-on technical support.
• Incident response consulting: Hands-on engagement to reconstruct attacker activity, document the scope of compromise, identify data loss, and support steps to reduce the risk of future incidents.
• Practitioner team: A team of over 1,000 security practitioners applying documented methodologies, with services tailored to each client’s environment and business requirements.

3.ガイドポイント

GuidePoint Security’s incident response services focus on scoping and investigating cyber incidents and developing remediation strategies. During an engagement, the team works with existing client tools and data sources, supplemented as needed, to build visibility across network, endpoint, and log environments. 

• Defined engagement structure: Follows industry-standard IR frameworks covering preparation, identification, containment, eradication, and recovery, with a documented engagement plan covering tasks, deliverables, communication methods, and reporting cadence.
• IR practitioner team: Team members hold certifications from SANS, ISC2, Offensive Security, and major cloud providers, with capabilities covering network traffic analysis, host triage, malware analysis and reverse engineering, and forensic disk and memory acquisition.
• Threat response coverage: Handles a range of incident types including ransomware, phishing, DDoS attacks, insider threats, and advanced persistent threats.
• Cyber insurance and legal coordination: Works with cyber insurance carriers and legal counsel throughout the engagement to address policy requirements and legal documentation.
• IR retainer: Provides on-demand access to the IR team, with optional proactive services including IR maturity assessments and enablement to strengthen readiness before an incident occurs.
• Ransomware response: Dedicated response services for ransomware incidents, including a separate threat actor communications retainer for organizations that may need negotiation support.

4.CDW

CDW offers cybersecurity advisory services that include incident response as part of a broader portfolio covering assessments, strategy, and managed security. Services are available for both reactive incident handling and proactive preparedness, with a team of security engineers available around the clock. 

• vCISO services: Technology-neutral security consulting provided on an ongoing basis to support security program maturity and strategic planning.
• Emergency and proactive incident response: Covers breach response from initial triage through incident handling, investigation, and forensic analysis conducted with the support of CDW’s partner network.
• IR preparedness services: Includes IR program and playbook development, readiness assessments, and tabletop exercises.
• Compromise assessment: Uses threat hunting tools and the MITRE ATT&CK framework to identify indicators of compromise and uncover active threats within an environment.
• SOC advisory: Addresses operational challenges within security operations centers, including benchmarking, penetration testing, technology deployment, and identifying automation opportunities.
• Vulnerability assessments: Identifies gaps in security controls against frameworks including NIST and CIS, covering perimeter, internal, and wireless environments.

5.マクニンカ

Macnica is a Japan-based technology company that provides security services built around knowledge developed through its Security Research Center, which tracks attacker trends, methods, and countermeasures. Its incident response capabilities are offered alongside a broader portfolio of monitoring, assessment, and consulting services. 

• Security advisory and consulting: Includes general security advisory services and support for organizations establishing or maturing internal CSIRTs.
• Security assessments: Covers device assessments, platform diagnostics, attack surface management, web application vulnerability diagnostics, and domain investigation services.
• Monitoring and operations: Includes SOC services, Active Directory monitoring, SIEM operational monitoring, EDR monitoring, and website security monitoring, with support for tools from multiple vendors.
• Incident response and threat hunting: Provides threat hunting and incident response services, along with initial response support and triage capabilities for active incidents.
• Training and CSIRT exercises: Offers suspicious email training and exercises designed to test and build the capabilities of internal CSIRT teams.
• Vulnerability risk management: Includes a SaaS-based vulnerability risk triage platform for managing and prioritizing identified vulnerabilities.

6.アールテック

R-tec is a German cybersecurity firm that delivers incident response through a retainer-based model, with a fixed monthly fee covering a standing on-call service with defined response times. Services span incident preparation, active response, and post-incident analysis. 

• Guaranteed response times: Service levels include Basic (hotline Monday–Friday, remote expert response within 6 hours) and Premium (24×7 hotline, remote expert response within 4 hours), with a Custom tier available on request.
• Incident response readiness: Establishes technical and organizational measures, processes, and tooling in advance, so that a documented action plan is in place before an incident occurs.
• Forensic analysis and reporting: Produces documentation covering the investigation findings and supports organizations in implementing remediation steps, including coordination with internal teams, external service providers, authorities, and cyber insurers.
• Threat intelligence integration: Aggregates knowledge from more than 100 incident response deployments and red team operations per year through a MISP-based platform, feeding current attacker tactics, techniques, and procedures into detection and threat hunting activities.
• APT response certification: R-tec is recognized by the German Federal Office for Information Security (BSI) as a qualified APT response provider, meeting the BSI’s requirements for defending against advanced persistent threat actors.
• Attack simulation: Conducts simulated attacks at varying complexity levels to test incident response plans, internal processes, tools, and team response capabilities.

7.レベルブルー

LevelBlue is a managed cybersecurity services company formed as a standalone entity from AT&T Cybersecurity in 2024. It offers a range of services including managed detection and response, threat intelligence, consulting, and incident response, delivered through a global network of security operations centers. 

• Incident response and forensics: Supports digital forensics investigations through acquisition and examination of storage devices, and analysis of data from system logs and network traffic to identify patterns and reconstruct attacker activity.
• Incident response planning: Works with organizations to develop tailored incident response plans and conduct plan testing to identify gaps before an incident occurs.
• Incident response retainer: Provides on-demand IR access, integrating with the LevelBlue USM Anywhere platform to offer visibility across the environment without requiring separate data normalization from multiple tools.
• Managed detection and response: Operates eight SOCs worldwide providing 24/7 monitoring, supported by threat intelligence research from the LevelBlue Labs team.
• AI-powered security operations: Delivers managed security operations and incident response capabilities in partnership with SentinelOne, incorporating AI-driven analysis into detection and response workflows.
• Threat intelligence: Includes access to the Open Threat Exchange (OTX), a threat intelligence sharing community originally developed under AT&T, providing organizations with community-sourced indicators of compromise and threat data.

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Exabeamプラットフォームの機能：SIEM、UEBA、SOAR、内部脅威、コンプライアンス、TDIR

Exabeam Fusion Enterprise Edition Incident Responderは、AIと自動化をセキュリティ・オペレーション・ワークフローに適用することで、サイバー脅威と戦うための総合的なアプローチを実現し、最も効果的な脅威の検知、調査、対応（TDIR）を提供します：

• AIによる検知は、ユーザーやエンティティの正常な行動を学習し、コンテキストを考慮したリスクスコアリングで脅威の優先順位をつけることで、リスクの高い脅威をピンポイントで検知します。
• 自動化された調査により、セキュリティ・オペレーションが簡素化され、異種データを相関させて脅威のタイムラインを作成することができます。
• プレイブックは、ワークフローを文書化し、アクティビティを標準化することで、調査と対応を迅速化します。
• 可視化は、最も戦略的な成果とデータおよび検出のギャップを埋めるためのフレームワークに対してカバレッジをマッピングします。

これらの機能により、Exabeamはセキュリティ・オペレーション・チームがより迅速、正確かつ一貫性のあるTDIRを実現できるよう支援します。