{
 "public_id": "AIR-2026-0076",
 "incident_id": "2026-03-claude-fraud-fake-plugin",
 "date_disclosed": "2026-03-17",
 "date_occurred": "2026-02",
 "title": "Claude Fraud: infostealer campaign distributing a fake 'Claude Code plugin' VS Code extension and fake Claude docs pages",
 "class": "in_the_wild",
 "attack_surface": "skill_plugin",
 "initial_vector": "malvertising_and_brand_impersonation_of_agent_tooling",
 "agent_capability_abused": [
  "developer_trust_in_agent_tooling"
 ],
 "target_product": "Fake Claude Code plugin (VS Code extension) and fake Claude download/doc pages",
 "target_vendor": "impersonating Anthropic",
 "autonomy_level": "assistant",
 "impact_realized": true,
 "impact_type": [
  "credential_theft",
  "data_exfiltration"
 ],
 "blast_radius": "15,600+ victims documented publicly; 3 confirmed incidents in 7AI-monitored environments",
 "cve": [],
 "taxonomy": {
  "owasp_asi": [
   "ASI05",
   "ASI03"
  ],
  "mitre_atlas": [],
  "labels": [
   "brand_impersonation",
   "malvertising",
   "ide_extension",
   "infostealer"
  ]
 },
 "defense_present": "marketplace and ad-network review",
 "defense_bypassed": true,
 "fix_shipped": "takedowns; operators redeployed on Squarespace-hosted lures",
 "primary_sources": [
  "https://blog.7ai.com/claude-fraud-malware-campaign-ai-developer-tools"
 ],
 "verified_quote": "Claude Fraud is an active, multi-variant malware campaign actively targeting developers and security professionals who use AI coding tools.",
 "confidence": "high",
 "notes": "7AI writeup; corroborating public research from Moonlock Lab and AdGuard. macOS variant delivered MacSync infostealer via Google-ad-served fake Claude download; Windows variants were malicious VS Code extensions masquerading as the Claude Code plugin at a large technology company.",
 "risk_category": "security_fraud",
 "risk_secondary": [
  "privacy",
  "brand_trust"
 ],
 "risk_subcategory": "Credential & Secret Theft",
 "risk_sub_secondary": [],
 "ai_entity": "generative",
 "agency": "ai_as_target",
 "agency_debatable": true,
 "agency_reason": "brand-impersonating malvertising delivering an infostealer",
 "vector_family": "other",
 "vector_detail": "malvertising_and_brand_impersonation_of_agent_tooling",
 "guardrail_kind": [
  "unknown"
 ],
 "guardrail_outcome": "silent",
 "xrefs": {
  "aiid": [],
  "atlas": [],
  "cve": [],
  "ghsa": []
 },
 "primary_asi": "ASI05",
 "agent_framework": "claude_code",
 "model_provider": "anthropic",
 "model_name": "",
 "detection_mechanism": "unknown",
 "tool_access": "unknown",
 "financial_loss_band": "unknown",
 "eai_category": "credential_theft",
 "eai_domain": "access_control_and_permissions",
 "eai_secondary": [
  "data_exfiltration_channels"
 ],
 "eai_reason": "subcategory: Credential & Secret Theft",
 "asi_curated": [
  "ASI05"
 ],
 "asi_scope": "in_scope",
 "asi_provenance": "curated_plus_rule",
 "asi_reason": "curated: ASI05 | added ASI03 (eai_category=credential_theft)",
 "submitted_by": "EAI Internal"
}