Low-confidence report · Case No. FB-2026-09-16-anthropic-operation-master-intrusions
A cybercriminal known as "masterblack" had AI agents that coverage says were powered by Claude write the exploit drivers, auto-exploit loop and exfiltration scripts used to breach VPN gateways and web apps at about 21 organizations, mostly in Brazil.
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Leaderboard / Case No. FB-2026-09-16-anthropic-operation-master-intrusions
A cybercriminal known as "masterblack" had AI agents that coverage says were powered by Claude write the exploit drivers, auto-exploit loop and exfiltration scripts used to breach VPN gateways and web apps at about 21 organizations, mostly in Brazil.
Score breakdown
| Component | Value | Reasoning |
|---|---|---|
| Sentence-Years | 5 | 18 USC 1030(a)(2)(C). Breaching organizations and dumping their databases for financial gain is aggravated 1030(a)(2)(C) (5 years). The Pix invoice-fraud campaign is left out because the operator, not the AI, wrote it, and SOCRadar couldn't confirm any money was collected. |
| × Contribution | 1.5 | Built the exploit: SOCRadar says the "AI developed the intrusion code (exploit drivers, auto-exploit loop, exfiltration scripts)", working attack tooling used in the confirmed compromises, while the operator wrote the fraud panel and the C2 extenders. |
| × Blast Radius | 1 | Third party: The confirmed victims are private organizations, mostly Brazilian web apps, VPN gateways, a billing database and a Slack workspace. Probing of other products found no compromise, so this is scored third party. |
| × Legal status | 1 | Crime. |
| + Tradecraft | 0 | The exploits targeted known flaws (e.g. GlobalProtect CVE-2026-0257). The privilege escalation and lateral movement in the coverage aren't attributed to the AI, so no rubric technique is claimed. |
| + Guardrails | 5 | Jailbroken: SOCRadar says recovered refusal transcripts show the operator "repeatedly framing offensive development requests as authorized bug bounty or penetration testing activity", a pretext used to get the model past its refusals. |
| + Dwell Time | 3 | Activity ran from 23 April to mid-September 2026. SOCRadar recorded its state as of 16 September but gives no discovery date, so date_precision is "before" with 16 September as the latest possible date. That can only shrink dwell, giving 0 days. SOCRadar, a third party, found it. |
| Total | 15.5 |
Charges the human could face
18 USC 1030(a)(2)(C)Up to 5 yearsBrazilian Penal Code, Article 154-A (invasion of a computer device, Law 12.737/2012)Brazil