Netskope named a Leader in the 2022 Gartner® Magic Quadrant™ for Security Service Edge. Get the Report.

  • プラットフォーム

    世界最大のセキュリティプライベートクラウドでの比類のない可視性とリアルタイムデータおよび脅威保護。

  • 製品

    Netskope製品は、NetskopeSecurityCloud上に構築されています。

Netskope は、データと脅威の保護、および安全なプライベートアクセスを実現するための機能を統合した、最新のクラウドセキュリティスタックを提供します。

プラットフォームを探索する

ネットスコープ、2022年Gartner社のセキュリティ・サービス・エッジ(SSE)のマジック・クアドラントでリーダーの1社と位置付けられる

レポートを読む
  • 変身

    デジタルトランスフォーメーションを保護します。

  • セキュリティの近代化

    今日と明日のセキュリティの課題に対応します。

  • フレームワーク

    サイバーセキュリティを形作る規制の枠組みを採用する。

  • 業界ソリューション

    Netskopeは、クラウドに安全に移行するためのプロセスを世界最大規模の企業に提供しています。

最小の遅延と高い信頼性を備えた、市場をリードするクラウドセキュリティサービスに移行します。

詳しくはこちら

シングルパスSSEフレームワークを使用して、他のセキュリティソリューションを回避することが多い脅威を防止します。

詳しくはこちら

SSEおよびSASE展開のためのゼロトラストソリューション

詳しくはこちら

Netskopeは、クラウドサービス、アプリ、パブリッククラウドインフラストラクチャを採用するための安全でクラウドスマートかつ迅速な旅を可能にします。

詳しくはこちら
  • お客様の成功事例

    デジタルトランスフォーメーションの旅を保護し、クラウド、Web、およびプライベートアプリケーションを最大限に活用します。

  • カスタマーサポート

    Netskope環境を最適化し、成功を加速するためのプロアクティブなサポートとエンゲージメント。

Netskopeを信頼して、進化する脅威、新しいリスク、テクノロジーの変化、組織とネットワークの変更、および新しい規制要件への対応を支援してください。

詳しくはこちら

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、ソフトウェア開発のさまざまなバックグラウンドを持つ世界中の資格のあるエンジニアが、タイムリーで高品質の技術支援を提供する準備ができています。

詳しくはこちら
  • リソース

    クラウドへ安全に移行する上でNetskopeがどのように役立つかについての詳細は、以下をご覧ください。

  • ブログ

    Netskopeがセキュリティサービスエッジ(SSE)を通じてセキュリティとネットワークの変革を可能にする方法を学びましょう。

  • イベント&ワークショップ

    最新のセキュリティトレンドを先取りし、仲間とつながりましょう。

  • 定義されたセキュリティ

    サイバーセキュリティ百科事典で知っておくべきことすべて。

セキュリティビジョナリーポッドキャスト

ボーナスエピソード:セキュリティサービスエッジ(SSE)の重要性

ポッドキャストを再生する

Netskopeがセキュリティサービスエッジ(SSE)機能を介してゼロトラストおよびSASEジャーニーを実現する方法に関する最新情報をお読みください。

ブログを読む

RSA2022でのNetskope

RSAのNetskopeセキュリティスペシャリストと会って話してください。

詳しくはこちら

セキュリティサービスエッジとは何ですか?

SASEのセキュリティ面、ネットワークとクラウドでの保護の未来を探ります。

詳しくはこちら
  • 会社概要

    クラウド、データ、ネットワークのセキュリティの課題を先取りするお手伝いをします。

  • ネットスコープが選ばれる理由

    クラウドの変革とどこからでも機能することで、セキュリティの機能方法が変わりました。

  • リーダーシップ

    ネットスコープの経営陣はお客様を成功に導くために全力を尽くしています。

  • パートナー

    私たちはセキュリティリーダーと提携して、クラウドへの旅を保護します。

Netskopeは仕事の未来を可能にします。

詳しくはこちら

Netskopeは、組織がゼロトラストの原則を適用してデータを保護できるように、クラウド、データ、およびネットワークのセキュリティを再定義しています。

詳しくはこちら

思想家、建築家、夢想家、革新者。 一緒に、私たちはお客様がデータと人々を保護するのを助けるために最先端のクラウドセキュリティソリューションを提供します。

私たちのチームに会う

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。

詳しくはこちら
ブログ 脅威ラボ Phishing Attacks on Retail Industry Ramp Up as the Holiday Shopping Season Approaches
Dec 13 2017

Phishing Attacks on Retail Industry Ramp Up as the Holiday Shopping Season Approaches

The end-of-year holidays are a lucrative time for phishing attackers and spammers as they try to leverage the festive season to victimize online consumers. This season also puts pressure on the retail industry to build up their inventory to meet the seasonal demand. Netskope Threat Research Labs has been tracking multiple campaigns where phishing emails are crafted to target the retail industry. The email body observed in these campaigns is specifically crafted to lure the warehouse managers and other smaller firms who provide inventory support to larger retail businesses. Netskope Threat Protection detects these malicious MS Office file attachments as Trojan.Valyria.111 and the dropped payload as Gen:Variant.Graftor.421418.

Attack Vector

As mentioned earlier the attack vector arrives as an email with an attachment as shown in Figure 1.

Figure 1: Email example targeting specific businesses

The email contains a weaponized Microsoft Excel or Word document file with embedded macros. In a number of enterprises, email attachments are often automatically synced to cloud storage services using file collaboration settings in popular SaaS applications and third-party applications. Since the file names appear less suspicious, they are more likely to be viewed as coming from within the organization (and therefore trusted) and shared with others in the same user group thereby resulting in a CloudPhishing fanout effect.

The doughnut chart shown in Figure 2 depicts the top enterprise cloud applications where CloudPhishing is dominant. Applications linked with email clients are mostly affected. For example, Microsoft OneDrive and Google Drive seamlessly integrate with their email clients and hence the files get synced across all users accessing the synced drive folders.


Figure 2: Distribution of malicious attachments stored in Cloud Applications

Analysis of malicious document

The attack follows the usual scenario wherein the office document contains an embedded macro and upon opening it prompts to enable editing. The list of indicators from the embedded macros upon executing Olevba from Oletools is shown in Figure 3.

Figure 3: List of indicators captured by Olevba

As shown in the above figure, the Excel document contains workbook_open() function which denotes the execution of the macro code when the document is opened. The initial macro code is highly obfuscated with the nature of the subroutines containing long variable declarations. All these functions are then called within workbook_open() as shown in Figure 4.

Figure 4: Obfuscated functions called by workbook_open()

Upon deobfuscation, the VB macro launches command prompt which in turn invokes Powershell. A simple representation of the shell command is shown in Figure 5.

Figure 5: Powershell command execution performed by the malicious macro

The PowerShell command then begins to download the payload from an SSL website https://lambda[.]sx , which appears to be a web server built using the GO programming language and open-sourced here: https://github.com/mstojcevich/lambda-ng-go. The malicious intent of the file cannot be tied to the web server and/or its owner at this point. We assume the website could have been compromised to host the malicious code. On further analysis of the related samples attributed to this campaign, we have also observed payloads delivered from popular cloud services like Dropbox and some other compromised web servers which we had blogged about in the past.

Malware Payload – Pony

The downloaded payload appears to exhibit the properties of the infamous data theft botnet called Pony or Fareit. This malware family has been used in phishing campaigns ever since its source code was made available for sale in underground hacking forums. The payload analysed in our investigation appeared to be built using Pony builder 2.0 and exhibits properties similar to the original Pony samples seen in the wild before its source code was for sale. The sample’s flow is obfuscated in a slightly more complex way than its predecessors but uses the same concept of Push-to-Ret which simulates a call return handle.

The malware begins its operation by creating persistence onto the host system through a VB script in the Startup directory which would invoke a copy of the malware stored in User/AppData/Roaming as shown in Figure 6.

Figure 6: VB script that creates persistence by running the malware binary on startup

The malware attempts to steal credentials from multiple services that use password authentication and contain critical data like FTP, RDP and Outlook as shown in Figure 7.

Figure 7: Pony malware attempting to enumerate FTP services on the infected host

The pony data theft trojan also attempts to change Internet access settings, steal browser history, and cookies from the infected host. The main thread then performs a process injection into explorer and counts on its persistence mechanism to ensure that it runs every time the machine restarts.

The malware attempts to communicate with its command and control server hosted on IP 185[.]62[.]188[.]128 which was down at the time of this analysis. The Post request made by the malware to its command and control server and the URI pattern is similar to the previous versions of pony as shown in Figure 8. Passive DNS data from Virustotal shows that the IP has a long history of hosting malicious services for malware authors and spammers.

Figure 8: Malware command and control activity

Conclusion

With the holiday shopping season around, organizations and individual users should be extra cautious about their online activities. Pay close attention to media where we share critical information like email communications, credit card details, and PII data. Year after year, we are witnessing a surge in digital crime activities during these months. Staying vigilant is the best approach towards a digitally safe holiday.

General Recommendations

Netskope recommends the following to combat such threats:

  • Detect and remediate cloud threats using a threat-aware CASB solution like Netskope and enforce policy on usage of unsanctioned services as well as unsanctioned instances of sanctioned cloud services
  • Sample policies to enforce:
    • Scan all uploads from unmanaged devices to sanctioned cloud applications for malware
    • Scan all uploads from remote devices to sanctioned cloud applications for malware
    • Scan all downloads from unsanctioned cloud applications for malware
    • Scan all downloads from unsanctioned instances of sanctioned cloud applications for malware
    • Enforce quarantine/block actions on malware detection to reduce user impact
    • Block unsanctioned instances of sanctioned/well known cloud apps, to prevent attackers from exploiting user trust in cloud. While this seems a little restrictive, it significantly reduces the risk of malware infiltration attempts via cloud
  • Enforce DLP policies to control files and data en route to or from your corporate environment
  • Regularly backup and turn on versioning for critical content in cloud services
  • Enable the “View known file extensions” option on Windows machines
  • Warn users to avoid executing unsigned macros and macros from an untrusted source, unless they are very sure that they are benign
  • Warn users to avoid executing any file unless they are very sure that they are benign
  • Warn users against opening untrusted attachments, regardless of their extensions or filenames
  • Keep systems and antivirus updated with the latest releases and patches