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]
ID: S0117
Associated Software: Trojan.Shunnael, X-Tunnel, XAPS
Type: MALWARE
Platforms: Windows
Version: 2.0
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 | XTunnel has been used to execute remote commands.[1] |
| Enterprise | T1090 | Connection Proxy | XTunnel relays traffic between a C2 server and a victim.[1] |
| 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 | XTunnel is capable of downloading additional files.[2] |
| Enterprise | T1032 | Standard Cryptographic Protocol | XTunnel uses SSL/TLS and RC4 to encrypt traffic.[2][3] |
Groups
Groups that use this software:
APT28