Schließen
Schließen
Ihr Netzwerk von morgen
Ihr Netzwerk von morgen
Planen Sie Ihren Weg zu einem schnelleren, sichereren und widerstandsfähigeren Netzwerk, das auf die von Ihnen unterstützten Anwendungen und Benutzer zugeschnitten ist.
          Erleben Sie Netskope
          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.
            Ein führendes Unternehmen im Bereich SSE. Jetzt ein führender Anbieter von SASE.
            Ein führendes Unternehmen im Bereich SSE. Jetzt ein führender Anbieter von SASE.
            Netskope debütiert als Leader im Gartner ® Magic Quadrant ™ für Single-Vendor SASE
              Generative KI für Dummies sichern
              Generative KI für Dummies sichern
              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
                Moderne Data Loss Prevention (DLP) für Dummies
                Get tips and tricks for transitioning to a cloud-delivered DLP.
                  Modernes SD-WAN für SASE Dummies-Buch
                  Modern SD-WAN for SASE Dummies
                  Hören Sie auf, mit Ihrer Netzwerkarchitektur Schritt zu halten
                    Verstehen, wo die Risiken liegen
                    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.
                        Die 6 überzeugendsten Anwendungsfälle für den vollständigen Ersatz älterer VPNs
                        Die 6 überzeugendsten Anwendungsfälle für den vollständigen Ersatz älterer VPNs
                        Netskope One Private Access is the only solution that allows you to retire your VPN for good.
                          Colgate-Palmolive schützt sein "geistiges Eigentum" mit intelligentem und anpassungsfähigem Datenschutz
                          Colgate-Palmolive schützt sein "geistiges Eigentum" mit intelligentem und anpassungsfähigem Datenschutz
                            Netskope GovCloud
                            Netskope erhält die FedRAMP High Authorization
                            Wählen Sie Netskope GovCloud, um die Transformation Ihrer Agentur zu beschleunigen.
                              Let's Do Great Things Together
                              Die partnerorientierte Markteinführungsstrategie von Netskope ermöglicht es unseren Partnern, ihr Wachstum und ihre Rentabilität zu maximieren und gleichzeitig die Unternehmenssicherheit an neue Anforderungen anzupassen.
                                Netskope solutions
                                Netskope Cloud Exchange
                                Netskope Cloud Exchange (CE) provides customers with powerful integration tools to leverage investments across their security posture.
                                  Technischer Support von Netskope
                                  Technischer Support von Netskope
                                  Überall auf der Welt sorgen unsere qualifizierten Support-Ingenieure mit verschiedensten Erfahrungen in den Bereichen Cloud-Sicherheit, Netzwerke, Virtualisierung, Content Delivery und Software-Entwicklung für zeitnahen und qualitativ hochwertigen technischen Support.
                                    Netskope-Video
                                    Netskope-Schulung
                                    Netskope-Schulungen helfen Ihnen, ein Experte für Cloud-Sicherheit zu werden. Wir sind hier, um Ihnen zu helfen, Ihre digitale Transformation abzusichern und das Beste aus Ihrer Cloud, dem Web und Ihren privaten Anwendungen zu machen.

                                      Why the Future of Command and Control is the Cloud

                                      Aug 10 2019

                                      Cloud adoption has grown dramatically within the enterprise and shows no signs of stopping. Many cloud services such as Github, Slack, Dropbox, and others are part of everyday business and rightfully don’t raise red flags to security teams. These systems are managed and patched by companies who have a strong incentive to protect the data that is stored on, and moves to and from, their infrastructure, in most cases providing encryption at rest and in transit. These are well-known, well-understood, and trusted systems with easy-to-use APIs.

                                      But what if attackers wanted to use those APIs too? Attackers are motivated to not get caught, and are also interested in having encryption at rest and in transit. Attackers don’t want red flags raised – and they sure don’t want their IPs and domains block listed or sinkholed. So why not use those same services? With the release of SaaSy_boi, a proof-of-concept with limited functionality, we explore how the cloud provides redundancy and resilience for all applications – even those you don’t want on your network. 

                                      Anatomy of an Attack

                                      Attackers can find all kinds of ways onto an endpoint – phishing, drive-by download, or even mistakenly downloading a file from a bucket with lax permissions. Once malware is there, most enterprises usually have an IDS or IPS to block the outbound communication. But what happens when the communication happens over a channel that is trusted and encrypted? This creates a huge problem for IDS, since URL-based detections will be defeated (the endpoint is trusted) and deep-packet inspection detections will be difficult (since the payload is encrypted). 

                                      In the case of our POC, SaaSy_boi, we start by pulling API keys from a paired url.txt file (URLs not included). This saves us the trouble of hard-coding API keys for Slack and Twitter, making it much easier for us to conduct our operations over multiple channels, should one of them be blocked by some unforeseen security solution. This sort of “lock but no key” approach is one we take repeatedly with SaaSy_boi to evade common mitigations.

                                      Then, by using SaaS as command and control, much the same way that SLUB did, attackers can operate under the radar from most security products and conduct their surreptitious operations for longer. Slack and Twitter operate as our command and control channels. Slack takes and responds to commands over a channel with the same name as the computer name, while Twitter simply tweets out command responses for commands received. We have a third fall-back channel in Github, but no command responses are posted – so you have to know what you want to do.

                                      SaaSy_boi will also:

                                      • Upload to Dropbox (given a key)
                                      • Download from dropbox (given a key)
                                      • Upload to Slack
                                      • Upload to file.io
                                      • Download from file.io
                                      • Execute any command over a reverse-shell
                                      • Take a screenshot and upload it to imgur

                                      Why Write This POC?

                                      We provide all this functionality so that researchers and security professionals can play with the code, run the POC, and write detections. We at Netskope and others in the security community believe that approaching our defensive posture from an attacker’s perspective can give us insights that simply thinking about defense doesn’t provide. As such, we seek to bypass defenses wherever they are so we and others can patch the holes we find and help make things safer for everyone.

                                      *NOTE*: If you want to freeze and package the executable to see what your security solutions can detect: the official Python docs have a resource for you.

                                      Conclusion

                                      This blog post is based on the talk I gave at Defcon 27. 
                                      SaaSy_Boi can be found here: https://github.com/netskopeOSS/saasy_boi

                                      author image
                                      Erick Galinkin
                                      Browse recent articles by Erick Galinkin, one of the contributors at Netskope. Discover the latest trends and updates within the cloud and network space.
                                      Browse recent articles by Erick Galinkin, one of the contributors at Netskope. Discover the latest trends and updates within the cloud and network space.

                                      Bleiben Sie informiert!

                                      Abonnieren Sie den Netskope-Blog