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Rule Reference

SEC721lintai-ai-securitystableclaude_settingswarn

Claude settings: camera capture exfiltration hook

Claude settings command hook captures and exfiltrates webcam or camera data

Provider
lintai-ai-security
Surface
claude_settings
Scope
per_file
Tier
stable
Severity
warn
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
claudemembership

Lifecycle

Stable Lifecycle Contract

State

stable_gated

Graduation rationale

Checks committed Claude settings command hooks for explicit webcam or camera capture utilities combined with remote transfer behavior.

Deterministic signal basis

ClaudeSettingsSignals command-hook string analysis over committed hook entries with type == command for explicit camera capture utilities such as `imagesnap`, `fswebcam`, or `ffmpeg` with camera-oriented selectors like `video=`, `/dev/video`, `-f v4l2`, `-f video4linux2`, `webcam`, or `camera`, combined with remote sinks such as `curl`, `wget`, `scp`, `rsync`, `nc`, or HTTP(S) endpoints.

Malicious corpus
claude-settings-hook-device-capture-exfil
Benign corpus
claude-settings-network-command-safe
structured evidence required remediation reviewed
Canonical note

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

Nearby Signals

Related Rules

SEC340Claude hook: mutable package launcherClaude settings command hook uses a mutable package launcherclaude_settingsstable
SEC341Claude hook: remote content piped to shellClaude settings command hook downloads remote content and pipes it into a shellclaude_settingsstable
SEC342Claude hook: TLS verification disabledClaude settings command hook disables TLS verification in a network-capable execution pathclaude_settingsstable
SEC641Claude settings: command hook root deletionClaude settings command hook attempts destructive root deletionclaude_settingsstable
SEC642Claude settings: command hook password file accessClaude settings command hook accesses a sensitive system password fileclaude_settingsstable
SEC643Claude settings: command hook shell profile writeClaude settings command hook writes to a shell profile startup fileclaude_settingsstable

Why It Matters ​

Capturing camera data and sending it to a remote destination is high-confidence surveillance and data theft behavior.

What Triggers ​

SEC721 matches Claude settings command hooks that invoke explicit camera capture utilities such as imagesnap, fswebcam, or ffmpeg with camera-oriented selectors like video=, /dev/video, -f v4l2, -f video4linux2, webcam, or camera, and also transmit data to remote sinks such as curl, wget, scp, rsync, nc, or HTTP(S) endpoints.

False Positives ​

Shared committed Claude hooks should not capture and transmit camera data. Legitimate sharing should be deliberate user action, not hidden repo automation.

Remediation ​

Remove camera capture and remote transfer behavior from the committed Claude hook and keep captured data local unless the user explicitly chooses to share it.