ShellProtect
Stop remote-control attacks by what they do — not what they are.
A reverse shell is how an attacker turns a foothold into hands-on control of your machine — quietly opening a back-channel and issuing commands as if they were sitting at the keyboard. ShellProtect spots that remote-control behavior the instant a connection opens and kills it, no matter what tool, language, or port the attacker used — even code written from scratch.
Part of the 1stProtect platform. One agent. No slowdown.
The problem ShellProtect solves.
Once an attacker can run code on a machine, their next move is to open a remote connection and start giving orders. The trouble is that this attack can be written a thousand different ways:
Every attacker writes it differently.
Reverse shells come in any language, over any port, with any tool. Signature-based defenses are forever chasing the next variant — and there's always a next variant.
Now AI writes them on demand.
An attacker can have an AI generate a brand-new reverse shell in seconds — code no security tool has ever seen, with no signature to match.
ShellProtect doesn't try to recognize the code. It recognizes the behavior — so it catches the connection whether it's a known tool or written on the spot by an AI.
How it works
Three things. Nothing you don't need.
Watch the behavior, not the file.
ShellProtect looks for the unmistakable pattern of a machine being controlled from the outside — regardless of language, tool, or port.
Cut the connection the instant it opens.
The moment a reverse shell tries to establish, ShellProtect detects it, prevents it, and kills the connection — before the attacker can run a single command.
Same protection everywhere.
One behavior-based approach across Windows, macOS, and Linux — and it works without knowing anything about the attacker, the code, or the language.
One engine. 22 modules.
ShellProtect doesn't work alone.
It runs on the same single SIGMA engine as the rest of 1stProtect — working alongside ExecutionProtect to stop the malware that tries to open the shell, and ExfilProtect to keep data from leaving once an attacker is in. One agent, one policy, no conflicts — online, offline, or fully air-gapped.
What it stops:
- —Reverse shells in any language, over any port
- —Brand-new or AI-generated attack code with no known signature
- —Remote-control and command-and-control sessions
- —Trojan-style “phone home, take orders, send results back” behavior
- —The same attacks across Windows, macOS, and Linux
See it in action
Watch it kill a shell an AI just wrote.
The setup. An everyday machine — Firefox, Slack, Zoom, Docker, the usual — with 1stProtect installed. The install runs fully offline, with no reboot, and starts protecting the programs already running, not just new ones.
The attack. Playing the attacker, we ask an unrestricted AI to write a brand-new reverse shell listener from scratch, start it up, and launch the matching reverse shell on the target — exactly how a modern attacker would.
The block. The instant the connection is established, ShellProtect detects and prevents it and severs the connection — before a single command can run. It never needed to recognize the code; it caught the behavior.
The record. On the risks page, a "Reverse shell detection" appears, attributed to ShellProtect, showing the process behind the attempt.
Deploy without breaking anything
Start in Audit Mode. Enforce when you're ready.
ShellProtect installs fully offline — no internet, no downloads, no reboot — and protects the processes already running the moment it's on, not just future ones. It ships in Audit Mode by default, so you can watch exactly what would be blocked before flipping to Enforcement Mode with one config change.
No slowdown
<1% CPU overhead · <100ms enforcement latency
Works anywhere
Cloud · on-prem · Kubernetes · 100% offline / air-gapped
Your data stays on your metal
Raw telemetry never leaves the device · TLS 1.3 · SOC 2 Type II · ISO 27001
Built by the people who built the industry
1stProtect's team comes from CrowdStrike, SentinelOne, Check Point, Splunk, Cisco, Oracle, McAfee, Symantec, and NTT Data — the engineers who defined modern endpoint security, now building runtime protection for what comes next.
See ShellProtect on your endpoints.
We'll deploy in Audit Mode and show you, in your own environment, exactly how it stops a remote-control attack — even one written from scratch.
For your security & engineering team
ShellProtect performs behavior-based detection and prevention of reverse-shell and remote-control (C2) activity through the user-space SIGMA engine — independent of language, tooling, port, or signature, so it neutralizes novel and AI-generated payloads the same way it handles known ones. Cross-platform across Windows, macOS, and Linux. On install it protects both pre-existing and newly created processes immediately ("backward protection"), fully offline, with no reboot — unlike tools that can only record existing processes but can't protect them without one. Detections (e.g. "Reverse shell detection") are recorded by the on-host MCP AI Investigator and stream to your SIEM/SOAR (Splunk, Datadog, Elastic) via JSON, gRPC, MCP, or Syslog. <1% CPU, real-time enforcement, with Audit and Enforcement modes.