SideTwist is a C-based backdoor that has been used by OilRig since at least 2021.[1]

ID: S0610
Platforms: Windows
Version: 1.0
Created: 06 May 2021
Last Modified: 13 October 2021

Techniques Used

Domain ID Name Use
Enterprise T1071 .001 Application Layer Protocol: Web Protocols

SideTwist has used HTTP GET and POST requests over port 443 for C2.[1]

Enterprise T1059 .003 Command and Scripting Interpreter: Windows Command Shell

SideTwist can execute shell commands on a compromised host.[1]

Enterprise T1132 .001 Data Encoding: Standard Encoding

SideTwist has used Base64 for encoded C2 traffic.[1]

Enterprise T1005 Data from Local System

SideTwist has the ability to upload files from a compromised host.[1]

Enterprise T1001 Data Obfuscation

SideTwist can embed C2 responses in the source code of a fake Flickr webpage.[1]

Enterprise T1140 Deobfuscate/Decode Files or Information

SideTwist can decode and decrypt messages received from C2.[1]

Enterprise T1573 .001 Encrypted Channel: Symmetric Cryptography

SideTwist can encrypt C2 communications with a randomly generated key.[1]

Enterprise T1041 Exfiltration Over C2 Channel

SideTwist has exfiltrated data over its C2 channel.[1]

Enterprise T1008 Fallback Channels

SideTwist has primarily used port 443 for C2 but can use port 80 as a fallback.[1]

Enterprise T1083 File and Directory Discovery

SideTwist has the ability to search for specific files.[1]

Enterprise T1105 Ingress Tool Transfer

SideTwist has the ability to download additional files.[1]

Enterprise T1106 Native API

SideTwist can use GetUserNameW, GetComputerNameW, and GetComputerNameExW to gather information.[1]

Enterprise T1082 System Information Discovery

SideTwist can collect the computer name of a targeted system.[1]

Enterprise T1016 System Network Configuration Discovery

SideTwist has the ability to collect the domain name on a compromised host.[1]

Enterprise T1033 System Owner/User Discovery

SideTwist can collect the username on a targeted system.[1]

Groups That Use This Software

ID Name References
G0049 OilRig