Netskope est nommé un leader du Gartner® Magic Quadrant™ 2024 pour le Security Service Edge. Recevoir le rapport

fermer
fermer
  • Pourquoi Netskope signe chevron

    Changer la façon dont le réseau et la sécurité fonctionnent ensemble.

  • Nos clients signe chevron

    Netskope sert plus de 3 000 clients dans le monde entier, dont plus de 25 entreprises du classement Fortune 100

  • Nos partenaires signe chevron

    Nous collaborons avec des leaders de la sécurité pour vous aider à sécuriser votre transition vers le cloud.

La Capacité d'Exécution la plus élevée, une fois de plus.
La Vision la plus complète, une fois de plus.

Découvrez pourquoi le Magic Quadrant™ 2024 de Gartner® a désigné Netskope comme leader pour la sécurité en périphérie des services pour la troisième année consécutive.

Recevoir le rapport
Netskope nommé leader dans le Magic Quadrant™ 2024 de Gartner® pour le graphique de la périphérie des services de sécurité
Nous parons nos clients à l'avenir, quel qu'il soit

Voir nos clients
Woman smiling with glasses looking out window
La stratégie de commercialisation de Netskope privilégie ses partenaires, ce qui leur permet de maximiser leur croissance et leur rentabilité, tout en transformant la sécurité des entreprises.

En savoir plus sur les partenaires de Netskope
Group of diverse young professionals smiling
Votre réseau de demain

Planifiez votre chemin vers un réseau plus rapide, plus sûr et plus résilient, conçu pour les applications et les utilisateurs que vous prenez en charge.

Obtenir le livre blanc
Votre réseau de demain
Présentation de la plate-forme Netskope One

Netskope One est une plate-forme cloud native qui offre des services de sécurité et de mise en réseau convergents pour faciliter votre transformation SASE et Zero Trust.

En savoir plus sur Netskope One
Abstrait avec éclairage bleu
Adopter une architecture SASE (Secure Access Service Edge)

Netskope NewEdge est le nuage privé de sécurité le plus grand et le plus performant au monde. Il offre aux clients une couverture de service, des performances et une résilience inégalées.

Découvrez NewEdge
NewEdge
Netskope Cloud Exchange

Le Netskope Cloud Exchange (CE) fournit aux clients des outils d'intégration puissants pour optimiser les investissements dans l'ensemble de leur infrastructure de sécurité.

En savoir plus sur Cloud Exchange
Vidéo Netskope
La plateforme du futur est Netskope

Intelligent Security Service Edge (SSE), Cloud Access Security Broker (CASB), Cloud Firewall, Next Generation Secure Web Gateway (SWG), et Private Access for ZTNA intégrés nativement dans une solution unique pour aider chaque entreprise dans son cheminement vers l'architecture Secure Access Service Edge (SASE).

Présentation des produits
Vidéo Netskope
Next Gen SASE Branch est hybride - connectée, sécurisée et automatisée

Netskope Next Gen SASE Branch fait converger Context-Aware SASE Fabric, Zero-Trust Hybrid Security et SkopeAI-Powered Cloud Orchestrator dans une offre cloud unifiée, ouvrant la voie à une expérience de succursale entièrement modernisée pour l'entreprise sans frontières.

En savoir plus Next Gen SASE Branch
Personnes au bureau de l'espace ouvert
La conception d'une architecture SASE pour les nuls

Obtenez votre exemplaire gratuit du seul guide consacré à la conception d'une architecture SASE dont vous aurez jamais besoin.

Obtenir l'EBook
Optez pour les meilleurs services de sécurité cloud du marché, avec un temps de latence minimum et une fiabilité élevée.

Découvrez NewEdge
Lighted highway through mountainside switchbacks
Permettez en toute sécurité l'utilisation d'applications d'IA générative grâce au contrôle d'accès aux applications, à l'accompagnement des utilisateurs en temps réel et à une protection des données de premier ordre.

Découvrez comment nous sécurisons l'utilisation de l'IA générative
Autorisez ChatGPT et l’IA générative en toute sécurité
Solutions Zero Trust pour les déploiements du SSE et du SASE

En savoir plus sur la confiance zéro
Boat driving through open sea
Netskope obtient l'autorisation FedRAMP High Authorization

Choisissez Netskope GovCloud pour accélérer la transformation de votre agence.

En savoir plus sur Netskope GovCloud
Netskope GovCloud
  • Ressources signe chevron

    Découvrez comment Netskope peut vous aider à sécuriser votre migration vers le Cloud.

  • Blog signe chevron

    Découvrez comment Netskope permet la transformation de la sécurité et de la mise en réseau grâce à la périphérie des services de sécurité (SSE)

  • Événements et ateliers signe chevron

    Restez à l'affût des dernières tendances en matière de sécurité et créez des liens avec vos pairs.

  • Définition de la sécurité signe chevron

    Tout ce que vous devez savoir dans notre encyclopédie de la cybersécurité.

Podcast Security Visionaries

On Patents, Trolls, and Innovation
In this episode host Emily Wearmouth chats with Suzanne Oliver, an intellectual property expert, and Krishna Narayanaswamy, co-founder and CTO of Netskope, about the world of patents.

Écouter le podcast
On Patents, Trolls, and Innovation
Derniers blogs

Découvrez comment Netskope peut faciliter la transition vers le Zero Trust et le SASE grâce aux fonctionnalités de sécurité en périphérie des services (SSE).

Lire le blog
Sunrise and cloudy sky
SASE Week 2023 : Votre voyage SASE commence maintenant !

Retrouvez les sessions de la quatrième édition annuelle de SASE Week.

Explorer les sessions
SASE Week 2023
Qu'est-ce que le Security Service Edge ?

Découvrez le côté sécurité de SASE, l'avenir du réseau et de la protection dans le cloud.

En savoir plus sur Security Service Edge
Four-way roundabout
  • Entreprise signe chevron

    Nous vous aidons à conserver une longueur d'avance sur les défis posés par le cloud, les données et les réseaux en matière de sécurité.

  • Équipe de direction signe chevron

    Nos dirigeants sont déterminés à faciliter la réussite de nos clients.

  • Solutions pour les clients signe chevron

    Nous sommes là pour vous et avec vous à chaque étape, pour assurer votre succès avec Netskope.

  • Formation et certification signe chevron

    Avec Netskope, devenez un expert de la sécurité du cloud.

Soutenir le développement durable par la sécurité des données

Netskope est fière de participer à Vision 2045 : une initiative visant à sensibiliser au rôle de l'industrie privée dans le développement durable.

En savoir plus
Soutenir le développement durable grâce à la sécurité des données
Penseurs, concepteurs, rêveurs, innovateurs. Ensemble, nous fournissons le nec plus ultra des solutions de sécurité cloud afin d'aider nos clients à protéger leurs données et leurs collaborateurs.

Rencontrez notre équipe
Group of hikers scaling a snowy mountain
L’équipe de services professionnels talentueuse et expérimentée de Netskope propose une approche prescriptive pour une mise en œuvre réussie.

En savoir plus sur les services professionnels
Services professionnels Netskope
Sécurisez votre parcours de transformation numérique et tirez le meilleur parti de vos applications cloud, Web et privées grâce à la formation Netskope.

En savoir plus sur les formations et les certifications
Group of young professionals working

CapitalInstall hosted and served via IaaS

Dec 11 2018
Étiquettes
azure
CapitalInstall
en IaaS
Linkury
Logiciels malveillants
microsoft azure
Microsoft Azure Security
Netskope Threat Protection
Netskope Threat Research Labs

Netskope Threat Research Labs detected an Adware family named, ‘CapitalInstall’ delivered from Microsoft Azure blob storage whose IP range was allow listed by the multiple customers. The malware was identified via telemetry that recently alerted us on a high number of detections. These detections were related to multiple customers in the health and retail sector that recently deployed Netskope Advanced Threat Protection. Before this deployment, the binaries were shared in multiple apps internally across several enterprise users, external users, public, and anyone with a cloud share link. These binaries, which claimed to provide keys and licenses related to popular software, were downloaded in the victims’ machines and synced to cloud storage apps. These files were in turn shared across several users who needed the keys and licenses of that software. Using our clustering mechanism, we also identified similar strains of CapitalInstall across several other customer instances which we detected in the past. This particular variant of CapitalInstall installers were delivered from the same Microsoft Azure blob storage URL and packaged with a bundled adware named ‘Linkury’.

This post describes our discovery and analysis of CapitalInstall and concludes with some recommendations to help protect and remediate such threats.

Netskope Detection

Netskope Advanced Threat Protection detects CapitalInstall samples we identified as SilentInstall.Gen.

Disclosure

The Azure blob storage URL delivering CapitalInstall was reported to Microsoft on 19 November 2018.

Découverte

As mentioned earlier, since the detections were considerably high in number, our Outbreak Detection System triggered malware alerts as shown in Figure 1.

Figure 1: Malware alerts from telemetry

Figure 1 illustrates a surge in the malware alerts from telemetry across several customer instances. The spikes above 100 were caused by the customers that recently deployed Netskope Threat Protection.

After analysis, we confirmed that the detections were related to several known malware, including potentially harmful and unwanted applications. A specific strain,’CapitalInstall’ packaged with an Adware family named ‘Linkury’ with a considerably high number of detections caught our attention. Several samples related to this malware family resident in cloud storage apps were shared across internal and external users and any user with the cloud share link.

Since the detections were high in number and shared across several users, we performed a deeper investigation leading us to the discovery of the Microsoft Azure blob storage link IP range allow listed by the customers that was delivering CapitalInstall binaries.

Delivery

After analyzing all the CapitalInstall binaries related to Linkury, we identified the delivery mechanism to be drive-by-download links from a website that claim to provide keys and licenses related to popular softwares. The drive-by-download links were attributed to several TLDs, which all proceed to fetch the Linkury binary from the same Azure blob storage link, intie[.]blob.core.windows.net.

CapitalInstall – Linkury

CapitalInstall is associated to a family of potentially unwanted applications (PUPs) that the victim might have inadvertently installed in the machine. The application’s network traffic can be easily identified by the User-Agent, ‘InstallCapital’ that is most commonly used by the installers. An example of the packet capture is shown in Figure 2.

Figure 2: User-Agent: InstallCapital

The potentially unwanted applications are packaged with bundlewares like Linkury. These applications plague the machine with annoying advertisements and download additional unwanted applications.

Malware Analysis

For the analysis, we have taken a software sample that has been downloaded several times by our customer. The sample is an ISO image file named Adobe+CC+2019+Crack.iso delivered from the Azure blob storage link, https://intie[.]blob.core.windows.net/54148/a350ab7c93a511322f4fd0/Adobe+CC+2019+Crack.iso

The iso file, Adobe+CC+2019+Crack.iso contained an executable named Adobe+CC+2019+Crack.exe as shown in Figure 3.

Figure 3: Adobe+CC+2019+Crack.iso embedded with CapitalInstall

The usage of iso image for embedding the CapitalInstall binary was something uncommon for traditional Adware related families.

The embedded binary, Adobe+CC+2019+Crack.exe was compiled with Microsoft Visual C++ 6.0 with an entry point function pointing to WinMain() in Olly debugger is as shown in Figure 4.

Figure 4: WinMain() of Adobe+CC+2019+Crack.exe in Olly debugger

After stepping in WinMain(), we found the presence of runtime packer code. As the name suggests, runtime packers is a packer that uses executable compression to unpack the executable during execution. Malware authors tend to use this compression in an attempt to thwart traditional Antivirus engines that scan for identifying the malicious code in the executable.

On execution, the installer displays a message to the victim as shown in Figure 5.

Figure 5:  Message displayed on execution

After clicking Next, the victim is then presented with the message from Linkury as shown in Figure 6.

Figure 6: Linkury install message

After clicking on Next, the victim is presented with a message that the installation of the Adobe CC 2019 crack is in progress and then directed to a webpage, http://ic-dc[.]bundlessafevault[.]com/pr/3e07b12e-e7d1-11e6-836f-02e33f60d095/typ_1.html, thanking the download/install of the binary.

Though the crack/key is not installed in the machine, the victim is instead displayed with a web page from swiftviz[.]net to install an unwanted browser search add-on named searchfort (http://www.searchfort[.]online/nlp/lp.html?source=912&clickid=w542O31BFM27RJ8IHON3L46E) as shown in Figure 7.

Figure 7: Victim displayed with a page to install searchfort browser add-on

Swiftviz[.]net is a service that lets one earn money for each visitor that visits the shortened links with adf.ly. There are several enticing messages displayed from swiftviz[.]net as shown in Figure 8, 9 and 10.

Figure 8: Message prompting to install CryptoTab

Figure 9: Message prompting to install Olymptrade

Figure 10: Message prompting to use adBTC

Several of these enticing messages invite the download and install of several unwanted software the victim’s machine.

All the metrics of the web pages displayed to the victim are sent to the website fuss.wavesfork[.]online with the User-Agent: InstallCapital as shown in Figure 11.

Figure 11: Metrics sent to the website fuss.wavesfork[.]online

Drive-by-download links, Similar strains, and Azure blob storage URL

As we continued to research the similar files using our clustering mechanism, we also identified similar strains of CapitalInstall in several customer instances which we detected in the past. Most of the files were initially delivered from URL’s with TLD’s club, fun, online, us, space, icu, pw, xyz, press, site, host, website, services, accountant, red. Nonetheless, all these were used as placeholders to download the binaries from the Azure blob storage URL, intie[.]blob.core.windows.net. An example of the HTTP traffic delivering the CapitalInstall from Azure blob storage as follows

 HTTP headers:

    GET /56181/JhdkWGnod56ahkspldunbRYdvpGaWemdFGaqG9Rm3dXRcXu/%5BPiratePCNet%5D%2BDrive%2BSnapShot%2B_%2B_%2BOnlyzip.exe HTTP/1.0

    Host: intie[.]blob.core.windows.net:443

    User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)

    Referer: http://playground.hospitalcar[.]fun/JhdkWGnod56ahkspldunbRYdvpGaWemdFGaqG9Rm3dXRcXu/

    Accept-Encoding: gzip

Using Virustotal Passive DNS records for the domain intie[.]blob.core.windows.net and our clustering mechanism, we identified close to 2000 unique hashes downloaded from the domain, starting from April 2018.

Conclusion

The advent of new technologies like containers, serverless applications, and SaaS storage are now the new standards of the industry with companies building their entire infrastructure on IaaS providers like Amazon AWS, Google Cloud, and Microsoft Azure. With a major shift of services towards cloud, the dynamics of threats have changed and they have started adapting to this new playground.

The research on CapitalInstall is a classic example of malware being hosted over IaaS for delivering the payload using placeholder websites. We also observed the Azure blob IP was allow listed and the downloaded binaries were shared across several across internal and external users. Generally, allow listing is done to reduce the performance issues introduced by scanners that treat the entire cloud app space equivalently. Organizations that do not have a multi-layered cloud-aware solution for threat detection are particularly vulnerable to attackers hosting malicious files in IaaS object stores.  

Enterprises should educate users on the best practices and to refrain from installs, downloads and accessing any website promoting cracks, keys, and licenses of popular software. Enterprise Administrators and Users must also be educated on the implications of allow listing IP’s and sharing files across users.

Netskope Advanced Threat Protection with its unique cloud vantage point combined with multi-layered threat detection and remediation capabilities offers customers a cloud scale platform that understands, protects and responds such attacks

author image
Ashwin Vamshi
Ashwin Vamshi is a Security Researcher with innate interest in targeted attacks and malwares using cloud services. He is primarily focusing in identifying new attack vectors and malwares, campaigns and threat actors using ‘cloud as an attack vector.’

Stay informed!

Subscribe for the latest from the Netskope Blog