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

  • Platform

    Unrivaled visibility and real-time data and threat protection on the world's largest security private cloud.

  • Products

    Netskope products are built on the Netskope Security Cloud.

Netskope delivers a modern cloud security stack, with unified capabilities for data and threat protection, plus secure private access.

Explore our platform

Netskope Named a Leader in the 2022 Gartner Magic Quadrant™ for SSE Report

Get the report

Make the move to market-leading cloud security services with minimal latency and high reliability.

Learn more

Prevent threats that often evade other security solutions using a single-pass SSE framework.

Learn more

Zero trust solutions for SSE and SASE deployments

Learn more

Netskope enables a safe, cloud-smart, and fast journey to adopt cloud services, apps, and public cloud infrastructure.

Learn more
  • Customer Success

    Secure your digital transformation journey and make the most of your cloud, web, and private applications.

  • Customer Support

    Proactive support and engagement to optimize your Netskope environment and accelerate your success.

  • Training and Certification

    Netskope training will help you become a cloud security expert.

Trust Netskope to help you address evolving threats, new risks, technology shifts, organizational and network changes, and new regulatory requirements.

Learn more

We have qualified engineers worldwide, with diverse backgrounds in cloud security, networking, virtualization, content delivery, and software development, ready to give you timely, high-quality technical assistance.

Learn more

Secure your digital transformation journey and make the most of your cloud, web, and private applications with Netskope training.

Learn more
  • Resources

    Learn more about how Netskope can help you secure your journey to the cloud.

  • Blog

    Learn how Netskope enables security and networking transformation through security service edge (SSE).

  • Events & Workshops

    Stay ahead of the latest security trends and connect with your peers.

  • Security Defined

    Everything you need to know in our cybersecurity encyclopedia.

Security Visionaries Podcast

Bonus Episode: The Importance of Security Service Edge (SSE)

Play the podcast

Read the latest on how Netskope can enable the Zero Trust and SASE journey through security service edge (SSE) capabilities.

Read the blog

Netskope at RSA 2022

Meet and speak with Netskope security specialists at RSA.

Learn more

What is Security Service Edge?

Explore the security side of SASE, the future of network and protection in the cloud.

Learn more
  • Company

    We help you stay ahead of cloud, data, and network security challenges.

  • Why Netskope

    Cloud transformation and work from anywhere have changed how security needs to work.

  • Leadership

    Our leadership team is fiercely committed to doing everything it takes to make our customers successful.

  • Partners

    We partner with security leaders to help you secure your journey to the cloud.

Netskope enables the future of work.

Find out more

Netskope is redefining cloud, data, and network security to help organizations apply Zero Trust principles to protect data.

Learn more

Thinkers, builders, dreamers, innovators. Together, we deliver cutting-edge cloud security solutions to help our customers protect their data and people.

Meet our team

Netskope’s partner-centric go-to-market strategy enables our partners to maximize their growth and profitability while transforming enterprise security.

Learn more
Blog Threat Labs CloudFanta Pops with the Cloud using SugarSync
Oct 18 2016

CloudFanta Pops with the Cloud using SugarSync

Netskope Threat Research Labs has discovered a new malware campaign, which we suspect stole more than 26,000 email credentials and also monitors online banking activities. The malware, which we have named “CloudFanta,” has been in operation since July 2016 and primarily targets Brazilian users.

This blog provides a preliminary overview of CloudFanta while we wait on the command and control hosts and cloud vendor to take down the malware and servers containing the email credentials.

Similar to the CloudSquirrel malware campaign that we uncovered in July 2016, CloudFanta arrives as an attachment or a link in a spearphishing email that lures the victim to execute the file or click the link. We observed the CloudFanta malware using the SugarSync cloud storage app for delivering a JAR file that functions as a downloader. The downloader JAR file again uses SugarSync for downloading Dynamic Linked Library (DLL) files with a “.png” extension. These DLL files, which are later renamed to the extension “.twerk,” are responsible for stealing the victim’s email credentials, sending malicious emails on behalf of the victim, and also for monitoring victims’ online banking activities.

Summary Observations

A high-level visual depiction of the CloudFanta malware infection is shown in Figure 1. The CloudFanta malware campaign highlighted the use of the cloud storage app, SugarSync for hosting drive-by-download files. Using tactics like the delivery of DLL files with the “.png” extension and the use of SSL/HTTPS communication with SugarSync allow CloudFanta to stay under the radar of a number of traditional, network-based security solutions. This clearly demonstrates the effective use of cloud services for hosting malware by malicious threat actors. The use of cloud services makes the delivery of malware very easy, effectively making it easier to compromise and gain access to users’ data. This clearly signifies an urgent need for enterprises to employ a multi-layered security approach with a strong focus on cloud services.

fig1

Figure 1: Visual depiction of CloudFanta malware infection

Netskope Detection and Remediation

The visual depiction of protection from CloudFanta malware with Netskope Threat Protection is shown in Figure 3. Netskope Threat Protection detects the files retrieved from the JAR downloader as Backdoor.Generckd.3549404, Backdoor.Generckd.3540808, Backdoor.Generckd.18673650, Backdoor.Generckd.3542220 and Gen:Variant.Symm.60013. Customers with the Netskope Active Platform and Netskope Introspection can set the respective malware and threat protection policies to detect and remediate against this malware. In addition to the above, Netskope Active platform customers can also block the DLL files with “.png” extension from being downloaded using a custom rule as shown in Figure 2.

fig2

Figure 2: Block policy alert for portable executable files with “.png” extensions
fig3

Figure 3: Visual depiction of protection from CloudFanta malware with Netskope Threat Protection

General Recommendations

Netskope recommends the following to combat cloud malware and threats:

  • Detect and remediate all malware in sanctioned cloud services using a threat-aware solution like Netskope Introspection.
  • Detect and remediate all malware being downloaded from unsanctioned cloud services using a threat-aware solution like the Netskope Active Platform.
  • Actively track usage of unsanctioned cloud services and enforce DLP policies to control files and data entering and leaving your corporate environment.
  • Create a security policy to block portable executable files with content type “image/png.”
  • Regularly back up and turn on versioning for critical content in cloud services.
  • Enable “view known file extension” options in Windows and avoid executing any file with dual extensions unless you are sure they are benign.
  • Warn users to avoid opening untrusted attachments regardless of their extension or file name.
  • Enable two-factor authentication for email and banking accounts as a safety measure to prevent attackers from accessing the email account even if they know the password.
  • Keep systems and antivirus updated with the latest releases and patches.

We will be publishing a detailed technical blog on CloudFanta soon.