Fake Claude AI website delivers new 'Beagle' Windows malware
A fake version for the Claude AI website offers a malicious Claude-Pro Relay download that pushes a previously undocumented backdoor for Windows named Beagle.
Grace Ops
triage-ready iocs + detections
fresh
1
IOC Workbench
typed indicators with fast copy and export actions
2 total
uhttps://www.bleepingcomputer.com/news/security/fake-claude-ai-website-delivers-new-beagle-windows-malware/
dwww.bleepingcomputer.com
2 indicators staged for handoff.
2
Rule Studio
starter detections generated from this IOC set
2 formats
!Draft output: validate and tune before production rollout.
sigmadraft
title: AHackaday IOC starter detection
id: ahackaday-2026-05-07-fake-claude-ai-website-delivers-new-beagle-windows-malware-39d8b67f
description: IOC starter rule for Fake Claude AI website delivers new 'Beagle' Windows malware
status: experimental
author: ahackaday
logsource:
product: network
detection:
selection_iocs:
- "https://www.bleepingcomputer.com/news/security/fake-claude-ai-website-delivers-new-beagle-windows-malware/"
- "www.bleepingcomputer.com"
condition: selection_iocs
falsepositives:
- unknown
level: high
coverage
yaradraft
rule ahackaday_2026_05_07_fake_claude_ai_website_delivers_new_beagle_windows_malware_39d8b67f
{
meta:
description = "IOC starter for Fake Claude AI website delivers new 'Beagle' Windows malware"
author = "ahackaday"
strings:
$ioc1 = "https://www.bleepingcomputer.com/news/security/fake-claude-ai-website-delivers-new-beagle-windows-malware/" nocase
$ioc2 = "www.bleepingcomputer.com" nocase
condition:
any of them
}
coverage
3
Response Tracks
fast operational tracks from this incident snapshot
4 tracks
source-backed 1 refs
audit trail / provenance2
Provenance
Claims tie surfaced fields back to sources, models, or heuristics.
- severity.upliftheuristicn/aRansomware campaign indicators detected — floor raised to at least high.
- severity.upliftheuristicn/aCombined zero-day/exploit + ransomware/mass-impact signals → critical.
What changed
Append-only revisions when ingest or analysts evolve the record.
No revision rows stored yet.
Sources
Curated May 07, 2026 by the ahackaday team./Sources verified./Brief grounded in 1 source.
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