Suspicious Cloudflare Workers Brand-Impersonation Phishing Domains via Proxy

ATT&CK techniques

Initial Access

Recon
Resource Dev
Initial Access
- T1566.002Spearphishing Link
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects proxy requests to Cloudflare Workers subdomains that impersonate document and cloud storage brands such as docviewer, onedrive, and adobe, matching the phishing lure infrastructure of the ARToken EvilTokens campaign reported by Cisco Talos. Attackers host credential and device-code capture pages on ephemeral workers.dev subdomains. Detecting these brand-mimicking hosts flags users being funneled into the phishing panel.

Reporting behind it

Related detections9 linkedT1566.002 — drag to rearrange

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Suspicious Screensaver File Executed as Installer via process_creation

Suspicious M365 Device Code Authentication Flow via m365

Malicious GTFire Phishing Credential Exfiltration to All-in-1.php Backend (via proxy)

Suspicious 1Phish Kit Cookies and Telemetry Beacon

Suspicious Cloudflare Workers Brand-Impersonation Phishing Domains via Proxy

Pivot detection · T1566.002 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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