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Security audit

Extruct List Building Skill

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward Extruct list-building workflow, with no hidden code, persistence, or destructive behavior found.

Install this if you want an agent to use Extruct for outbound company list building. Be aware it may read GTM context files containing ICPs, win cases, DNC domains, customers, or partners, and may send company domains to Extruct via the companion API skill.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The manifest lists triggers such as "find companies" and especially "build a list," which are broad phrases that can overlap with common user requests outside this specific outbound-list-building skill. The file does not provide negative examples or tighter activation constraints to distinguish when this skill should or should not activate.

Content

No source excerpt is available for this finding.

Skill Enumeration

Medium
Category
Agent Snooping
Confidence
80% confidence
Finding

Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.

Content

Scanner excerpt · SKILL.md (reported line 23)May include surrounding context.

md
This skill delegates all Extruct API calls to the `extruct-api` skill.

For all Extruct API operations, read and follow the instructions in `skills/extruct-api/SKILL.md`.

All company search, lookalike search, deep search, table creation, row uploads, and enrichment runs are handled by the extruct-api skill. This skill focuses on **what** to search for and **why** — the extruct-api skill handles the **how**.

Static analysis

No suspicious patterns detected.