XTunnel
XTunnel a VPN-like network proxy tool that can relay traffic between a C2 server and a victim. It was first seen in May 2013 and reportedly used by APT28 during the compromise of the Democratic National Committee. [1] [2] [3]
Associated Software Descriptions
| Name | Description |
|---|---|
| Trojan.Shunnael | [4] |
| X-Tunnel | [1][4] |
| XAPS | [3] |
Techniques Used
| Domain | ID | Name | Use |
|---|---|---|---|
| Enterprise | T1009 | Binary Padding |
A version of XTunnel introduced in July 2015 inserted junk code into the binary in a likely attempt to obfuscate it and bypass security products.[3] |
| Enterprise | T1059 | Command-Line Interface | |
| Enterprise | T1090 | Connection Proxy | |
| Enterprise | T1081 | Credentials in Files |
XTunnel is capable of accessing locally stored passwords on victims.[2] |
| Enterprise | T1008 | Fallback Channels |
The C2 server used by XTunnel provides a port number to the victim to use as a fallback in case the connection closes on the currently used port.[3] |
| Enterprise | T1046 | Network Service Scanning |
XTunnel is capable of probing the network for open ports.[2] |
| Enterprise | T1027 | Obfuscated Files or Information |
A version of XTunnel introduced in July 2015 obfuscated the binary using opaque predicates and other techniques in a likely attempt to obfuscate it and bypass security products.[3] |
| Enterprise | T1105 | Remote File Copy | |
| Enterprise | T1032 | Standard Cryptographic Protocol |
Groups That Use This Software
| ID | Name | References |
|---|---|---|
| G0007 | APT28 | [5] [4] |
References
- Alperovitch, D.. (2016, June 15). Bears in the Midst: Intrusion into the Democratic National Committee. Retrieved August 3, 2016.
- Belcher, P.. (2016, July 28). Tunnel of Gov: DNC Hack and the Russian XTunnel. Retrieved August 3, 2016.
- ESET. (2016, October). En Route with Sednit - Part 2: Observing the Comings and Goings. Retrieved November 21, 2016.