TEXTMATE is a second-stage PowerShell backdoor that is memory-resident. It was observed being used along with POWERSOURCE in February 2017. [1]

ID: S0146
Associated Software: DNSMessenger
Platforms: Windows
Version: 1.1
Created: 31 May 2017
Last Modified: 30 March 2020

Associated Software Descriptions

Name Description

Based on similar descriptions of functionality, it appears S0146, as named by FireEye, is the same as Stage 4 of a backdoor named DNSMessenger by Cisco's Talos Intelligence Group. However, FireEye appears to break DNSMessenger into two parts: S0145 and S0146. [2] [1]

Techniques Used

Domain ID Name Use
Enterprise T1071 .004 Application Layer Protocol: DNS

TEXTMATE uses DNS TXT records for C2.[1]

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

TEXTMATE executes cmd.exe to provide a reverse shell to adversaries.[1][2]

Groups That Use This Software

ID Name References
G0046 FIN7