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Hacking Back the AI-Hacker: Prompt Injection as a Defense Against LLM-driven Cyberattacks

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arxiv 2410.20911 v2 pith:F4AD3VT3 submitted 2024-10-28 cs.CR cs.AI

classification cs.CRcs.AI
keywords mantisattackerdefensecyberattacksllm-drivenautomatedbackexploits
verification ladder T0 review T1 audit T2 compute T3 formal
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Large language models (LLMs) are increasingly being harnessed to automate cyberattacks, making sophisticated exploits more accessible and scalable. In response, we propose a new defense strategy tailored to counter LLM-driven cyberattacks. We introduce Mantis, a defensive framework that exploits LLMs' susceptibility to adversarial inputs to undermine malicious operations. Upon detecting an automated cyberattack, Mantis plants carefully crafted inputs into system responses, leading the attacker's LLM to disrupt their own operations (passive defense) or even compromise the attacker's machine (active defense). By deploying purposefully vulnerable decoy services to attract the attacker and using dynamic prompt injections for the attacker's LLM, Mantis can autonomously hack back the attacker. In our experiments, Mantis consistently achieved over 95% effectiveness against automated LLM-driven attacks. To foster further research and collaboration, Mantis is available as an open-source tool: https://github.com/pasquini-dario/project_mantis

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. AgentSnare: Learning to Delay, Divert, and Defuse Autonomous Penetration Agents

    cs.CR 2026-07 conditional novelty 7.0 of 10

    A trajectory-adaptive honeypot system, AgentSnare, achieves a 0/45 verified exploit rate against LLM-based penetration testers across 15 vulnerable web apps and three attacker models.

  2. Beyond Pattern Matching: Seven Cross-Domain Techniques for Prompt Injection Detection

    cs.CR 2026-04 unverdicted novelty 7.0 of 10

    The work introduces and partially evaluates seven cross-domain prompt injection detectors, reporting F1 gains on benchmarks like deepset/prompt-injections and indirect-injection sets via local alignment, stylometry, a...

  3. LLM in the Middle: A Systematic Review of Threats and Mitigations to Real-World LLM-based Systems

    cs.CR 2025-09 conditional novelty 6.0 of 10

    A systematic review that categorizes LLM threats, severity scores, and mitigations across development and operation life cycles and multiple deployment scenarios.

  4. Agentic AI and the Cyber Arms Race

    cs.CY 2025-02 unverdicted novelty 3.0 of 10

    A perspective piece arguing that agentic AI will democratize cyberweapons and reshape global power balances like nuclear proliferation did.

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