Beware the LLM Hijack: Indirect Prompt Injection and RUG Pull Attacks Explained with a Dash of Paranoia
Indirect prompt injection is like a sneaky ninja slipping hidden instructions into seemingly normal data, turning LLMs into unwitting accomplices. Meanwhile, RUG Pull attacks are the tech equivalent of replacing your morning coffee with decaf—trusted tools silently swapped for evil twins. In both cases, attackers don’t need to hack the model; they manipulate its environment.

Hot Take:
In the world of MCP, the only thing more dangerous than a hacker is a hacker with a thesaurus. As LLMs become more sophisticated, so do the cyber crooks who want to exploit them. Who knew that the real threat wasn’t HAL 9000, but rather a cleverly crafted email or a sneaky software update? It’s like getting a ransom note from a toaster. Time to batten down the hatches and maybe throw in a few extra layers of cyber duct tape.
Key Points:
- Indirect prompt injection attacks involve sneaky, malicious instructions hidden in seemingly innocuous data.
- RUG Pull attacks exploit trust in MCP tools by swapping them with malicious versions.
- The expanded attack surface in MCP environments is stealthy and difficult to defend against.
- Defensive strategies include strict tool verification, human-in-the-loop checks, and context isolation.
- Attackers don’t need to hack the entire system—they just need to manipulate inputs and infrastructure.