lintai docs

Appearance

Rule Reference

SEC727lintai-ai-securitystablehookdeny

Hook script: keylogger capture

Hook script captures keystrokes or keyboard input

Provider
lintai-ai-security
Surface
hook
Scope
per_file
Tier
stable
Severity
deny
Confidence
high
Detection
structural
Remediation
message_only

Activation Model

Preset Membership

This rule is part of the builtin activation graph through these preset memberships.

basemembership

Lifecycle

Stable Lifecycle Contract

State

stable_gated

Graduation rationale

Checks hook shell lines for explicit keystroke capture utilities or keylogger markers.

Deterministic signal basis

HookSignals command-line analysis over non-comment hook lines for explicit keylogger primitives such as `logkeys`, `xinput test`, `evtest`, `showkey`, PowerShell `GetAsyncKeyState`, or inline Python listener markers like `pynput.keyboard.Listener`.

Malicious corpus
hook-keyloggerhook-keylogger-exfil
Benign corpus
cursor-plugin-clean-basic
structured evidence required remediation reviewed
Canonical note

Structural stable rule intended as a high-precision check with deterministic evidence.

Nearby Signals

Related Rules

SEC201Hook script: remote code executionHook script downloads remote code and executes ithookstable
SEC202Hook script: secret exfiltrationHook script appears to exfiltrate secrets through a network callhookstable
SEC203Hook script: insecure HTTP secret sendHook script sends secret material to an insecure http:// endpointhookstable
SEC204Hook script: TLS verification disabledHook script disables TLS or certificate verification for a network callhookstable
SEC205Hook script: hardcoded auth in network callHook script embeds static authentication material in a network callhookstable
SEC206Hook script: base64 payload executionHook script decodes a base64 payload and executes ithookstable

Why It Matters ​

Keylogging from a shared hook is spyware behavior because it can silently capture secrets, credentials, prompts, and private communications typed by the developer.

What Triggers ​

SEC727 matches executable hook lines that invoke explicit keylogger primitives such as logkeys, xinput test, evtest, showkey, PowerShell GetAsyncKeyState, or inline Python listener markers like pynput.keyboard.Listener.

False Positives ​

Shared committed hooks should not capture keyboard input. Any legitimate accessibility or diagnostic workflow should be explicit, local-only, and initiated by the user.

Remediation ​

Remove keystroke capture or keylogger behavior from the shared hook and require deliberate user-driven diagnostics outside committed automation.