By back-checking the SSl certificates used by these devices, we found that there were about 100k IPs using the same SSl certificate. The AS numbers of the infected device IPs were all AS7018|AT&T_Services,_Inc. We have captured a total of 3 versions of EwDoor, with version 0.16.0 as a blueprint, we can characterize EwDoor as, a botnet that sends C2 down through BT tracker, uses TLS to protect traffic, and mainly profits by means of DDoS attacks and sensitive data theft, which currently propagates through the Nday vulnerability CVE-2017-6079, mainly targeting EdgeMarc Enterprise Session Border Controller devices.īy grabbing the author's unregistered CC domain name, we were able to measure the size of this Botnet for a little while, when the active Bot IP was around 5.7k. November 20, 2021, EwDoor was updated version 0.16.0, minor update, adding more BT Trackers. November 15, 2021, EwDoor updated to version 0.16.0, minor update, adding sandbox confrontation features. November 8, 2021, EwDoor was updated to version number 0.15.0, moving C2 from local to cloud, using BT Trackers. October 27, 2021, first capture of EwDoor, version number 0.12.0, main features are DDoS Attack, File Manager, Reverse Shell, Port Scan, etc. Given the size, activity of EwDoor, and sensitivity of the infected devices, we decided to write this paper to share our findings with the community. Based on the attacked devices are telephone communication related, we presume that its main purpose is DDoS attacks, and gathering of sensitive information, such as call logs. So far, the EwDoor in our view has undergone 3 versions of updates, and its main functions can be summarized into 2 main categories of DDoS attacks and Backdoor. However, during this brief observation, we confirmed that the attacked devices were EdgeMarc Enterprise Session Border Controller, belonging to the telecom company AT&T, and that all 5.7k active victims that we saw durning the short time window were all geographically located in the US. Unfortunately EwDoor reconfigured its communication model after experiencing problems with the main C2 network failure, using BT tracker to downlink C2s, and in turn we lost sight of EwDoor.
The initial version of EwDoor used a multi-C2 redundancy mechanism, and we registered the second C2 domain,, which gave us the opportunity to measure its size. The kernel is separated into multiple modules so that only the required support needs to be configured. When this happens, the route to this host will be automatically deleted.On October 27, 2021, our Botmon system ided an attacker attacking Edgewater Networks' devices via CVE-2017-6079 with a relatively unique mount file system command in its payload, which had our attention, and after analysis, we confirmed that this was a brand new botnet, and based on it's targeting of Edgewater producers and its Backdoor feature, we named it EwDoor. To use wireless networking, a wireless networking card is needed and the kernel needs to be configured with the appropriate wireless networking support. This type of route has a timeout, seen in the Expire column, which is used if the host does not respond in a specific amount of time.
#NETWORK REDUNDANCY INDEX CALCULATOR TRANSCAD MAC#
The addresses beginning with 0:e0: are MAC addresses.įreeBSD will automatically identify any hosts, test0 in the example, on the local Ethernet and add a route for that host over the Ethernet interface, re0. This indicates that all traffic for this destination should be internal, rather than sending it out over the network. The interface specified in the Netif column for localhost is lo0, also known as the loopback device. The default route for a machine which itself is functioning as the gateway to the outside world will be the gateway machine at the Internet Service Provider (ISP). Common Address Redundancy Protocol (CARP) File and Print Services for Microsoft® Windows® Clients (Samba) Dynamic Host Configuration Protocol (DHCP) Lightweight Directory Access Protocol (LDAP) Locale Configuration for Specific LanguagesĬhapter 24. FreeBSD as a Host with VirtualBox™Ĭhapter 23. FreeBSD as a Guest on VMware Fusion for macOS® FreeBSD as a Guest on Parallels Desktop for macOS® RAID3 - Byte-level Striping with Dedicated Parity GEOM: Modular Disk Transformation Framework Troubleshooting the MAC FrameworkĬhapter 19. Using pkg for Binary Package ManagementĬhapter 8.
Installing Applications: Packages and Ports Mounting and Unmounting File SystemsĬhapter 4. Accounts, Time Zone, Services and Hardening