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Prompt Steel: Russia-linked threat group uses LLM-powered tool to automate data theft

Cybersecurity YouTube briefing (AI-Driven Cyber Threats Surge: SMBs Embrace MDR, Shadow AI, and Evolving Malware Tactics) 2026-03-15 AI agent abuse Critical

Executive Summary

A Russia-linked group reportedly uses Prompt Steel, a tool that relies on an LLM to generate commands for stealing information.

What Happened

A Russia-linked group is reported to be using a tool called Prompt Steel that relies on a large language model to generate commands for stealing information, illustrating the operational use of AI agents in cyber attacks against organizations including SMBs.[2] The briefing highlights Prompt Steel as part of a broader surge in AI-driven cyber threats, with evolving malware tactics and growing risk of automated data theft enabled by LLM-generated instructions.[2]

Vulnerability / Attack Technique

LLM-generated commands for data theft

Technical Mechanism

The malware asks an LLM for commands to run on the victim system to collect data.

AI Security Category

AI-assisted attack

Part of the AI-Assisted Attacks topic.

Relevant Frameworks

MITRE ATLAS: CollectionMITRE ATLAS: Exfiltration

RealGround Analysis

Malware is outsourcing command generation to LLMs. RealGround analysis: detect unexpected LLM API calls from endpoints.

Recommended Controls

  • Alert on LLM API traffic from endpoints that should not use AI

Related RealGround Service

Secure AI Agent Build · or start with the free AI Agent Security Scanner.

Sources

Cybersecurity YouTube briefing (AI-Driven Cyber Threats Surge: SMBs Embrace MDR, Shadow AI, and Evolving Malware Tactics): https://www.youtube.com/watch?v=doFMJAGWfLA

Summary and analysis written by RealGround from the source above; last updated 2026-10-18.

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