閉める
閉める
明日に向けたネットワーク
明日に向けたネットワーク
サポートするアプリケーションとユーザー向けに設計された、より高速で、より安全で、回復力のあるネットワークへの道を計画します。
          Netskopeを体験しませんか?
          Get Hands-on With the Netskope Platform
          Here's your chance to experience the Netskope One single-cloud platform first-hand. Sign up for self-paced, hands-on labs, join us for monthly live product demos, take a free test drive of Netskope Private Access, or join us for a live, instructor-led workshops.
            SSEのリーダー。 現在、シングルベンダーSASEのリーダーです。
            SSEのリーダー。 現在、シングルベンダーSASEのリーダーです。
            Netskope、2024年ガートナー、シングルベンダーSASEのマジック・クアドラントでリーダーの1社の位置付けと評価された理由をご確認ください。
              ダミーのためのジェネレーティブAIの保護
              ダミーのためのジェネレーティブAIの保護
              Learn how your organization can balance the innovative potential of generative AI with robust data security practices.
                Modern data loss prevention (DLP) for Dummies eBook
                最新の情報漏えい対策(DLP)for Dummies
                Get tips and tricks for transitioning to a cloud-delivered DLP.
                  SASEダミーのための最新のSD-WAN ブック
                  Modern SD-WAN for SASE Dummies
                  遊ぶのをやめる ネットワークアーキテクチャに追いつく
                    リスクがどこにあるかを理解する
                    Advanced Analytics transforms the way security operations teams apply data-driven insights to implement better policies. With Advanced Analytics, you can identify trends, zero in on areas of concern and use the data to take action.
                        レガシーVPNを完全に置き換えるための6つの最も説得力のあるユースケース
                        レガシーVPNを完全に置き換えるための6つの最も説得力のあるユースケース
                        Netskope One Private Access is the only solution that allows you to retire your VPN for good.
                          Colgate-Palmoliveは、スマートで適応性のあるデータ保護により「知的財産」を保護します
                          Colgate-Palmoliveは、スマートで適応性のあるデータ保護により「知的財産」を保護します
                            Netskope GovCloud
                            NetskopeがFedRAMPの高認証を達成
                            政府機関の変革を加速するには、Netskope GovCloud を選択してください。
                              Let's Do Great Things Together
                              Netskopeのパートナー中心の市場開拓戦略により、パートナーは企業のセキュリティを変革しながら、成長と収益性を最大化できます。
                                Netskopeソリューション
                                Netskope Cloud Exchange
                                Netskope Cloud Exchange (CE) provides customers with powerful integration tools to leverage investments across their security posture.
                                  Netskopeテクニカルサポート
                                  Netskopeテクニカルサポート
                                  クラウドセキュリティ、ネットワーキング、仮想化、コンテンツ配信、ソフトウェア開発など、多様なバックグラウンドを持つ全世界にいる有資格のサポートエンジニアが、タイムリーで質の高い技術支援を行っています。
                                    Netskopeの動画
                                    Netskopeトレーニング
                                    Netskopeのトレーニングは、クラウドセキュリティのエキスパートになるためのステップアップに活用できます。Netskopeは、お客様のデジタルトランスフォーメーションの取り組みにおける安全確保、そしてクラウド、Web、プライベートアプリケーションを最大限に活用するためのお手伝いをいたします。

                                      Threat Actors Distributing Screenshotter Malware from OneDrive

                                      Jan 26 2024

                                      According to the data collected by Netskope Threat Labs, over the course of 2023, OneDrive was the most exploited cloud app in terms of malware downloads. And if a good day starts in the morning, 2024 does not promise anything good.

                                      In fact, at the beginning of January, and after a nine-month break, researchers from Proofpoint detected a new financially motivated campaign by TA866, a threat actor characterized for being involved in activities related to both cybercrime and cyberespionage.

                                      In their latest campaign, the threat actors flooded targets in North America with several thousands of emails containing PDF documents with subject lines that should entice victims to open the files. PDF files rank steadily on the top of the list of popular malware file types, and this campaign is no exception. The PDFs contained OneDrive URLs that, if clicked, triggered a multi-step infection leading to the installation of the Screenshotter malware payload, a screenshot grabber utility weaponized by the attackers, via a well-known dropper.

                                      In particular, the OneDrive link served a JavaScript file that, if run by the user, would download and run an MSI file, executing the malicious dropper WasabiSeed. The WasabiSeed VBS script would then download and execute a second MSI file containing components of the Screenshotter screenshot utility which would  take a screenshot of the desktop and send it to the C2.

                                      This is yet another example where the attackers leveraged multiple social engineering tricks: a subject teasing the curiosity of the victim, and a legitimate cloud service triggering a sophisticated multi-stage infection chain.

                                      Mitigating the Risks of Malware Delivered from Legitimate Cloud Services

                                      Microsoft OneDrive is one of the thousands of cloud services where the Netskope Next Gen SWG can provide adaptive access control, threat protection, and Data Loss Prevention. It is also one of the hundreds of apps for which instance detection is available. So, in cases where this service, or a similar cloud storage app, is exploited to deliver a malicious payload or to host the command and control infrastructure, whether it is a personal or corporate instance, it is possible to configure a policy for preventing potentially dangerous activities (such as “Upload” and “Download”) if the service is not needed by the organization, singularly or as a category. On the other hand, if the app is in use by the organization, it is possible to configure a policy for preventing any risky activities from non-corporate instances only, mitigating the risk of malware delivery and data exfiltration.

                                      Netskope customers are also protected against malware distributed from a legitimate cloud service and the web in general within sophisticated multi-stage infection chains, by Netskope Threat Protection. Netskope Threat Protection scans web and cloud traffic to detect known and unknown threats with a comprehensive set of engines, including signature-based AV, machine learning detectors for executables and Office documents, and sandboxing with patient zero protection. Netskope threat intelligence can also detect command and control connections even if they are directed to a legitimate cloud service.

                                      Netskope Cloud Exchange provides powerful integration tools to leverage investments across users’ security posture through integration with third-party tools, such as threat intelligence feeds, endpoint protection and email protection technologies (including Proofpoint.)

                                      Finally, Netskope Advanced Analytics provides specific dashboards to assess the risk of rogue cloud instances being exploited to deliver malware or the risk of becoming the target of anomalous communications, with rich details and insights, supporting security teams in the analysis and mitigation/remediation process.

                                      Stay safe!

                                      author image
                                      Paolo Passeri
                                      Paolo supports Netskope’s customers in protecting their journey to the cloud and is a security professional, with 20+ years experience in the infosec industry.
                                      Paolo supports Netskope’s customers in protecting their journey to the cloud and is a security professional, with 20+ years experience in the infosec industry.

                                      Stay informed!

                                      Subscribe for the latest from the Netskope Blog