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PowerStallion

PowerStallion is a lightweight PowerShell backdoor used by Turla, possibly as a recovery access tool to install other backdoors.[1]

ID: S0393
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Type: MALWARE
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Platforms: Windows
Version: 1.1
Created: 21 June 2019
Last Modified: 09 February 2021
Enterprise Layer
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Techniques Used

Domain ID Name Use
Enterprise T1059 .001 Command and Scripting Interpreter: PowerShell

PowerStallion uses PowerShell loops to iteratively check for available commands in its OneDrive C2 server.[1]
Enterprise T1070 .006 Indicator Removal on Host: Timestomp

PowerStallion modifies the MAC times of its local log files to match that of the victim's desktop.ini file.[1]
Enterprise T1027 Obfuscated Files or Information

PowerStallion uses a XOR cipher to encrypt command output written to its OneDrive C2 server.[1]
Enterprise T1057 Process Discovery

PowerStallion has been used to monitor process lists.[1]
Enterprise T1102 .002 Web Service: Bidirectional Communication

PowerStallion uses Microsoft OneDrive as a C2 server via a network drive mapped with net use.[1]

Groups That Use This Software

ID Name References
G0010 Turla

[1]

References

  1. Faou, M. and Dumont R.. (2019, May 29). A dive into Turla PowerShell usage. Retrieved June 14, 2019.