# Anthropic — Detecting and countering misuse of AI: September 2026

- Company: Anthropic (anthropic.com)
- Announced: 2026-09-10
- Category: safety-policy-update
- Coverage: 14 outlets
- Announcement: yes
- Group: covered
- Source: https://www.anthropic.com/threat-intelligence-report-september-2026
- Record: https://forck.live/items/9943-detecting-and-countering-misuse-of-ai-september-2026
- Subject: Claude
- Models affected: Claude Haiku, Sonnet, Opus, Claude Fable, Mythos

Anthropic's Threat Intelligence team identified and disrupted operations where threat actors used Claude for malicious activity across seven harm areas between December 2025 and August 2026. The report shares case studies of notable threat activity, including cyber operations, influence operations, and surveillance, and describes how malicious use of Claude has evolved. Anthropic states it disrupted the activity, strengthened safeguards, and shared intelligence with authorities and industry partners.

## Evidence

Verbatim from https://www.anthropic.com/threat-intelligence-report-september-2026:

> Over the past eight months, our Threat Intelligence team identified and disrupted operations in which threat actors tried to use Claude for malicious activity. In this report, we share case studies from those operations and describe how malicious use of Claude has evolved since our previous threat reports in March , August , and November 2025. In each case, we disrupted the activity, used what we learned to strengthen our safeguards, and shared intelligence with authorities and industry partners, where appropriate.

## Around this story

Outlets this record can name and link:

- Axios: https://axios.com/2026/09/10/anthropic-claude-government-surveillance-threats
- Tom's Hardware — Anthropic says Claude thwarted bioweapon research from state-sponsored actors — covert accounts used U.S. proxies to attempt to engineer deadlier viruses, tried to evade identification and regional blocks: https://tomshardware.com/tech-industry/artificial-intelligence/anthropic-says-claude-thwarted-bioweapon-research-from-state-sponsored-actors-covert-accounts-used-u-s-proxies-to-attempt-to-engineer-deadlier-viruses-tried-to-evade-identification-and-regional-blocks
- Unite — Anthropic Details Disrupted Claude Misuse Across Seven Harm Areas: https://unite.ai/anthropic-details-disrupted-claude-misuse-across-seven-harm-areas
- Implicator — Anthropic Details Claude’s Use in State Surveillance: https://implicator.ai/anthropic-claude-surveillance-mali-china-iran
- NBC News — Government-linked accounts tried to use Claude for work that could lead to bioweapons, Anthropic says: https://nbcnews.com/tech/tech-news/anthropic-state-linked-scientists-banned-regions-used-claude-virus-res-rcna596859
- SecurityWeek: https://securityweek.com/anthropic-says-russian-hackers-used-claude-ai-to-automate-malware-evasion
- HotHardware — Anthropic Threat Report Exposes Attempts To Build Biological Weapons With Claude: https://hothardware.com/news/anthropic-threat-report-exposes-attempts-to-build-biological-weapons-with-claude
- San — Anthropic says scientists used Claude for research with potential bioweapons risks: https://san.com/cc/anthropic-says-scientists-used-claude-for-research-with-potential-bioweapons-risks
- The Tech Portal — Anthropic says Claude was misused for extensive weapons research by potential state-backed actors: https://thetechportal.com/2026/09/11/anthropic-says-claude-was-misused-for-extensive-weapons-research-by-potential-state-backed-actors
- Cointelegraph — Anthropic Says Claude Used for Cyberattacks and Surveillance: https://cointelegraph.com/news/claude-ai-cyberattacks-surveillance-weapons-anthropic
- The Record — Anthropic caught Russia-linked spies using Claude in hacking operations: https://therecord.media/anthropic-russia-hackers-claude
- SFist — Anthropic Says It Shut Down Several Efforts to Use Claude to Develop Biological Weapons: https://sfist.com/2026/09/10/anthropic-says-it-shut-down-several-efforts-to-use-claude-to-develop-biological-weapons
- Resilience Media — Claude AI helped Russia-based threat actors develop autonomous kamikaze drone swarm: https://resiliencemedia.co/claude-ai-helped-russia-based-threat-actors-develop-autonomous-kamikaze-drone-swarm
- Salon — Anthropic says it blocked use of bad actors developing bioweapons: https://salon.com/2026/09/10/anthropic-says-it-blocked-use-of-bad-actors-developing-bioweapons

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