[![Logo](https://www.paloaltonetworks.com/wp-content/uploads/2021/07/PANW_Parent.png)](https://www.paloaltonetworks.jp/) [![Unit42 Logo](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/unit42-logo-white.svg)](https://unit42.paloaltonetworks.com/ja/) Menu * [セキュリティ コンサルティング](https://www.paloaltonetworks.com/unit42) * [**現在、攻撃を受けていますか?**](https://start.paloaltonetworks.com/contact-unit42.html) Japanese * [English](https://unit42.paloaltonetworks.com/ransomware-threat-assessments/) * [Japanese](https://unit42.paloaltonetworks.com/ja/ransomware-threat-assessments/) * [Threat Research Center](https://unit42.paloaltonetworks.com/ja/ "Threat Research") * [トレンド レポート](https://unit42.paloaltonetworks.com/ja/category/trend-reports-ja/ "トレンド レポート") * [ランサムウェア](https://unit42.paloaltonetworks.com/ja/category/ransomware-ja/ "ランサムウェア") [ランサムウェア](https://unit42.paloaltonetworks.com/ja/category/ransomware-ja/) # ランサムウェアの脅威評価:『2021 Unit 42ランサムウェア脅威レポート』の手引き ![Clock Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-clock.svg) 7 分で読めます * ![Profile Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-profile-grey.svg) 著者: * [Unit 42](https://unit42.paloaltonetworks.com/ja/author/unit42/) * ![Published Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-calendar-grey.svg) 公開日:2021年3月17日 * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-category.svg) カテゴリー * [トレンド レポート](https://unit42.paloaltonetworks.com/ja/category/trend-reports-ja/) * [マルウェア](https://unit42.paloaltonetworks.com/ja/category/malware-ja/) * [ランサムウェア](https://unit42.paloaltonetworks.com/ja/category/ransomware-ja/) * [主なサイバー脅威](https://unit42.paloaltonetworks.com/ja/category/top-cyberthreats-ja/) * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-tags-grey.svg) タグ: * [Defray777](https://unit42.paloaltonetworks.com/ja/tag/defray777-ja/) * [Dharma](https://unit42.paloaltonetworks.com/ja/tag/dharma-ja/) * [DoppelPaymer](https://unit42.paloaltonetworks.com/ja/tag/doppelpaymer-ja/) * [GandCrab](https://unit42.paloaltonetworks.com/ja/tag/gandcrab-ja/) * [NetWalker](https://unit42.paloaltonetworks.com/ja/tag/netwalker-ja/) * [Phobos](https://unit42.paloaltonetworks.com/ja/tag/phobos-ja/) * [Ransomware threat report](https://unit42.paloaltonetworks.com/ja/tag/ransomware-threat-report-ja/) * [REvil](https://unit42.paloaltonetworks.com/ja/tag/revil-ja/) * [Zeppelin](https://unit42.paloaltonetworks.com/ja/tag/zeppelin-ja/) * [![Download Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-download.svg)](https://unit42.paloaltonetworks.com/ja/ransomware-threat-assessments/?pdf=download&lg=ja&_wpnonce=4a1c13b7e7 "Click here to download") * [![Print Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-print.svg)](https://unit42.paloaltonetworks.com/ja/ransomware-threat-assessments/?pdf=print&lg=ja&_wpnonce=4a1c13b7e7 "Click here to print") 共有![Down arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/down-arrow.svg) * ![Link Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-share-link.svg) * [![Link Email](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-sms.svg)](mailto:?subject=ランサムウェアの脅威評価:『2021%20Unit%2042ランサムウェア脅威レポート』の手引き&body=Check%20out%20this%20article%20https%3A%2F%2Funit42.paloaltonetworks.com%2Fja%2Fransomware-threat-assessments%2F "Share in email") * [![Facebook 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ランサムウェアがCOVID-19のパンデミックをどのように利用しようとしたか、脅威アクターのアプローチの変化、ターゲットプラットフォームに関する情報など、2020年のランサムウェアの状況の観測。 * 米国、カナダ、ヨーロッパの組織からの平均的なランサムウェアの支払い額。 * 亜種の使用がどのように増加するか、身代金の要求額がどのように高まる可能性があるかなどの考えを含む、ランサムウェアの将来の予測。さらには、脅威アクターがサービスとしてのランサムウェアモデル（RaaS）をどのように活用するかについての詳しい説明。 * リスクを最小限に抑え、組織を攻撃から保護する方法に関する実用的なガイダンス。 ランサムウェアの現在の状態と組織を安全に保つ方法の詳細については、[2021 Unit 42ランサムウェア脅威レポート](https://start.paloaltonetworks.com/unit-42-ransomware-threat-report?utm_source=social&utm_medium=blog)をダウンロードし、[4月27日開催のウェブキャストに参加](https://register.paloaltonetworks.com/2021unit42ransomwarethreatrep?utm_source=social&utm_medium=blog)してください。 主要なランサムウェアファミリの詳細については、以前に公開された[Maze](https://unit42.paloaltonetworks.jp/threat-brief-maze-ransomware-activities/)、[Ryuk](https://unit42.paloaltonetworks.jp/ryuk-ransomware/)、[WastedLocker](https://unit42.paloaltonetworks.jp/wastedlocker/)、[Egregor](https://unit42.paloaltonetworks.jp/egregor-ransomware-courses-of-action/)の各ランサムウェア脅威評価を参照してください。 以下のページからは、本レポートで取り上げられたランサムウェアファミリの詳細な脅威評価をご確認いただけます。 * [NetWalker](https://unit42.paloaltonetworks.jp/ransomware-threat-assessments/2). * [Zeppelin](https://unit42.paloaltonetworks.jp/ransomware-threat-assessments/3). * [DoppelPaymer](https://unit42.paloaltonetworks.jp/ransomware-threat-assessments/4). * [Phobos](https://unit42.paloaltonetworks.jp/ransomware-threat-assessments/5). * [Dharma](https://unit42.paloaltonetworks.jp/ransomware-threat-assessments/6). * [GandCrab and REvil](https://unit42.paloaltonetworks.jp/ransomware-threat-assessments/7). * [Defray777](https://unit42.paloaltonetworks.jp/ransomware-threat-assessments/8). ***続きを読む: [NetWalker](https://unit42.paloaltonetworks.jp/ransomware-threat-assessments/2)*** ***[トップに戻る](https://unit42.paloaltonetworks.jp/ransomware-threat-assessments/)*** トップに戻る ### タグ * [Defray777](https://unit42.paloaltonetworks.com/ja/tag/defray777-ja/ "Defray777") * [Dharma](https://unit42.paloaltonetworks.com/ja/tag/dharma-ja/ "Dharma") * [DoppelPaymer](https://unit42.paloaltonetworks.com/ja/tag/doppelpaymer-ja/ "DoppelPaymer") * [GandCrab](https://unit42.paloaltonetworks.com/ja/tag/gandcrab-ja/ "GandCrab") * [NetWalker](https://unit42.paloaltonetworks.com/ja/tag/netwalker-ja/ "NetWalker") * [Phobos](https://unit42.paloaltonetworks.com/ja/tag/phobos-ja/ "Phobos") * [Ransomware threat report](https://unit42.paloaltonetworks.com/ja/tag/ransomware-threat-report-ja/ "ransomware threat report") * [REvil](https://unit42.paloaltonetworks.com/ja/tag/revil-ja/ "REvil") * [Zeppelin](https://unit42.paloaltonetworks.com/ja/tag/zeppelin-ja/ "Zeppelin") [Threat Research Center](https://unit42.paloaltonetworks.com/ja/ "Threat Research") [次ページ:『2021 Unit 42 ランサムウェア脅威レポート』からの注目ポイント](https://unit42.paloaltonetworks.com/ja/ransomware-threat-report-highlights/ "『2021 Unit 42 ランサムウェア脅威レポート』からの注目ポイント") ### 関連記事 * [Ransom CartelランサムウェアにREvilとの潜在的関連性](https://unit42.paloaltonetworks.com/ja/ransom-cartel-ransomware/ "article - table of contents") * [ランサムウェアギャングREvil: 脅威アクターは復活したのか (2022年6月更新)](https://unit42.paloaltonetworks.com/ja/revil-threat-actors/ "article - table of contents") * [2022 Unit 42 ランサムウェア脅威レポートからの注目ポイント: 依然として主要な脅威](https://unit42.paloaltonetworks.com/ja/2022-ransomware-threat-report-highlights/ "article - table of contents") ## 関連項目 リソース ![Pictorial representation of ChainDrop, a self-propagating npm worm. An artistic depiction of a digital workspace featuring an open laptop with a red virus on the screen.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/08/03_Malware_Category_1920x900-7-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)主なサイバー脅威](https://unit42.paloaltonetworks.com/ja/category/top-cyberthreats-ja/) 2026年8月6日 [#### ChainDropの脅威の概要:自己増殖型npmワームの内部](https://unit42.paloaltonetworks.com/ja/chaindrop-npm-worm-analysis/) * [Blockchain](https://unit42.paloaltonetworks.com/ja/tag/blockchain-ja/ "blockchain") * [ChainDrop](https://unit42.paloaltonetworks.com/ja/tag/chaindrop/ "ChainDrop") * [Claude code](https://unit42.paloaltonetworks.com/ja/tag/claude-code/ "Claude code") [今すぐ読む ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ja/chaindrop-npm-worm-analysis/ "ChainDropの脅威の概要:自己増殖型npmワームの内部") ![Pictorial representation of the npm packages supply chain attack. Screen displaying code with a prominent alert symbol and the words 'VIRUS DETECTED' highlighted in red.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/04/05_Malware_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)主なサイバー脅威](https://unit42.paloaltonetworks.com/ja/category/top-cyberthreats-ja/) 2026年6月2日 [#### npmの脅威の状況: アタックサーフェスと緩和策(6月2日更新)](https://unit42.paloaltonetworks.com/ja/monitoring-npm-supply-chain-attacks/) * [Credential Harvesting](https://unit42.paloaltonetworks.com/ja/tag/credential-harvesting-ja/ "Credential Harvesting") * [GitHub](https://unit42.paloaltonetworks.com/ja/tag/github-ja/ "GitHub") * [Npm packages](https://unit42.paloaltonetworks.com/ja/tag/npm-packages/ "npm packages") [今すぐ読む ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ja/monitoring-npm-supply-chain-attacks/ "npmの脅威の状況: アタックサーフェスと緩和策(6月2日更新)") ![Pictorial representation of Screening Serpens. An illustrated blue snake is highlighted by a red circle against a night sky. The constellation serpens.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/05/Serpens-Iran-A-1920x900-2-786x368.png) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/threat-actor-groups.svg)脅威アクター グループ](https://unit42.paloaltonetworks.com/ja/category/threat-actor-groups-ja/) 2026年5月22日 [#### イランAPT Screening Serpensによる2026年スパイ キャンペーンの追跡](https://unit42.paloaltonetworks.com/ja/tracking-iran-apt-screening-serpens/) * [Advanced Persistent Threat](https://unit42.paloaltonetworks.com/ja/tag/advanced-persistent-threat-ja/ "Advanced Persistent Threat") * [AppDomainManager](https://unit42.paloaltonetworks.com/ja/tag/appdomainmanager/ "AppDomainManager") * [DLL Sideloading](https://unit42.paloaltonetworks.com/ja/tag/dll-sideloading-ja/ "DLL Sideloading") [今すぐ読む ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ja/tracking-iran-apt-screening-serpens/ "イランAPT Screening Serpensによる2026年スパイ キャンペーンの追跡") ![Pictorial representation of Iran cyber attacks. Close-up of a person wearing glasses, with computer code reflected in the lenses.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/03/12_Security-Technology_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)主なサイバー脅威](https://unit42.paloaltonetworks.com/ja/category/top-cyberthreats-ja/) 2026年4月17日 [#### 脅威情報: 2026年イランに関するサイバー リスクの激化(4月17日更新)](https://unit42.paloaltonetworks.com/ja/iranian-cyberattacks-2026/) * [APK](https://unit42.paloaltonetworks.com/ja/tag/apk-ja/ "APK") * [DDoS attacks](https://unit42.paloaltonetworks.com/ja/tag/ddos-attacks-ja/ "DDoS attacks") * [GenAI](https://unit42.paloaltonetworks.com/ja/tag/genai-ja/ "GenAI") [今すぐ読む ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ja/iranian-cyberattacks-2026/ "脅威情報: 2026年イランに関するサイバー リスクの激化(4月17日更新)") ![Pictorial representation of the supply chain attack compromising Axios. A giant eye made of glowing binary code.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/04/02_Security-Technology_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)主なサイバー脅威](https://unit42.paloaltonetworks.com/ja/category/top-cyberthreats-ja/) 2026年4月1日 [#### 脅威概要:Axiosサプライ チェーン攻撃で広範に及ぶ影響](https://unit42.paloaltonetworks.com/ja/axios-supply-chain-attack/) * [API attacks](https://unit42.paloaltonetworks.com/ja/tag/api-attacks-ja/ "API attacks") * [JavaScript](https://unit42.paloaltonetworks.com/ja/tag/javascript-ja/ "JavaScript") * [Powershell](https://unit42.paloaltonetworks.com/ja/tag/powershell-ja/ "Powershell") [今すぐ読む ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ja/axios-supply-chain-attack/ "脅威概要:Axiosサプライ チェーン攻撃で広範に及ぶ影響") ![Pictorial representation of TeamPCP. Glowing code on a screen where several word such as Crime, Hackers, and Security are highlighted in a contrasting color.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/03/03_Cybercrime_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)主なサイバー脅威](https://unit42.paloaltonetworks.com/ja/category/top-cyberthreats-ja/) 2026年3月31日 [#### プロテクターを武器として利用する:セキュリティ インフラにおけるTeamPCPの多段階サプライ チェーン攻撃](https://unit42.paloaltonetworks.com/ja/teampcp-supply-chain-attacks/) * [CVE-2025-55182](https://unit42.paloaltonetworks.com/ja/tag/cve-2025-55182-ja/ "CVE-2025-55182") * [GitHub](https://unit42.paloaltonetworks.com/ja/tag/github-ja/ "GitHub") * [Infostealer](https://unit42.paloaltonetworks.com/ja/tag/infostealer-ja/ "Infostealer") [今すぐ読む ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ja/teampcp-supply-chain-attacks/ "プロテクターを武器として利用する:セキュリティ インフラにおけるTeamPCPの多段階サプライ チェーン攻撃") ![Pictorial representation of phishing campaign. A blurred image focusing on a person typing on a laptop with lines of code visible on the screen, illuminated in blue and red lights, suggestive of intense coding or cyber activities.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/03/06_Malware_Category_1920x900-3-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)脅威リサーチ](https://unit42.paloaltonetworks.com/ja/category/threat-research-ja/) 2026年3月24日 [#### 脅威情報: パロアルトネットワークスの人材獲得チームになりすました採用スキーム](https://unit42.paloaltonetworks.com/ja/phishing-attackers-pose-as-panw-recruiters/) * [Email scam](https://unit42.paloaltonetworks.com/ja/tag/email-scam/ "email scam") * [Lure](https://unit42.paloaltonetworks.com/ja/tag/lure/ "lure") * [Phishing](https://unit42.paloaltonetworks.com/ja/tag/phishing-ja/ "phishing") [今すぐ読む ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ja/phishing-attackers-pose-as-panw-recruiters/ "脅威情報: パロアルトネットワークスの人材獲得チームになりすました採用スキーム") ![Pictorial representation of Notepad++ supply chain compromise. A digital rendering of Earth from space, focusing on North and South America. The continents are illuminated in blue, with red lines and dots indicating data connections across various locations. Dark background highlights the vibrant network representation.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/02/11_Security-Technology_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)主なサイバー脅威](https://unit42.paloaltonetworks.com/ja/category/top-cyberthreats-ja/) 2026年2月11日 [#### 国家支援型の脅威アクターがNotepad++のサプライチェーンを悪用](https://unit42.paloaltonetworks.com/ja/notepad-infrastructure-compromise/) * [Backdoor](https://unit42.paloaltonetworks.com/ja/tag/backdoor-ja/ "backdoor") * [Cobalt Strike](https://unit42.paloaltonetworks.com/ja/tag/cobalt-strike-ja/ "Cobalt Strike") * [DLL Sideloading](https://unit42.paloaltonetworks.com/ja/tag/dll-sideloading-ja/ "DLL Sideloading") [今すぐ読む ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ja/notepad-infrastructure-compromise/ "国家支援型の脅威アクターがNotepad++のサプライチェーンを悪用") ![Pictorial representation of runtime assembly attacks. Digital artwork of a glowing, futuristic shield disintegrating into small particles, set against a dark blue, bokeh-effect background.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/01/09_Business_email_compromise_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)脅威リサーチ](https://unit42.paloaltonetworks.com/ja/category/threat-research-ja/) 2026年1月22日 [#### ランタイムアセンブリ攻撃の新たなフロンティア：LLMを活用したフィッシング用JavaScriptのリアルタイム生成](https://unit42.paloaltonetworks.com/ja/real-time-malicious-javascript-through-llms/) * [API](https://unit42.paloaltonetworks.com/ja/tag/api-ja/ "API") * [Google](https://unit42.paloaltonetworks.com/ja/tag/google-ja/ "Google") * [JavaScript](https://unit42.paloaltonetworks.com/ja/tag/javascript-ja/ "JavaScript") [今すぐ読む ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ja/real-time-malicious-javascript-through-llms/ "ランタイムアセンブリ攻撃の新たなフロンティア：LLMを活用したフィッシング用JavaScriptのリアルタイム生成") ![Pictorial representation of SLOW#TEMPEST campaign. Digital artwork depicting a malware alert symbol on a computer screen, with background of blurred programming code in blue and red colors.](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/07/07_Malware_Category_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)脅威リサーチ](https://unit42.paloaltonetworks.com/ja/category/threat-research-ja/) 2026年1月2日 [#### Pyarmorを利用して難読化と検知回避を行うVVS Discord Stealer](https://unit42.paloaltonetworks.com/ja/vvs-stealer/) * [Discord](https://unit42.paloaltonetworks.com/ja/tag/discord/ "Discord") * [Infostealer](https://unit42.paloaltonetworks.com/ja/tag/infostealer-ja/ "Infostealer") * [Python](https://unit42.paloaltonetworks.com/ja/tag/python-ja/ "Python") [今すぐ読む ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ja/vvs-stealer/ "Pyarmorを利用して難読化と検知回避を行うVVS Discord Stealer") * ![Slider arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/slider-arrow-left.svg) * ![Slider arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/slider-arrow-left.svg) ![Close button](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/close-modal.svg) ![Enlarged Image]() ![Newsletter](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/04/Unit-42_get-updates-banner.png) ![UNIT 42 Small Logo](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/palo-alto-logo-small.svg) Unit 42 からの最新情報を取得 ## 進化する脅威の状況を常に先取り メール アドレス 本フォームを送信することにより、[利用規約](https://www.paloaltonetworks.jp/legal-notices/terms-of-use)に同意し、[プライバシー ポリシー](https://www.paloaltonetworks.jp/legal-notices/privacy)を承認したことになります。 本サイトは reCAPTCHA で保護されており、Googleの[プライバシー ポリシー](https://policies.google.com/privacy) と[サービス利用規約](https://policies.google.com/terms)が適用されます。 Invalid 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