ZOHOMURK Non-Browser Zoho and IPFetcher User-Agents (via proxy)

ATT&CK techniques

Exfiltration

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
- T1567.002Exfiltration to Cloud Storage
Impact

What it detects

This rule detects the hardcoded Zoho client and IPFetcher user-agent strings used by the ZOHOMURK implant when abusing Zoho WorkDrive and ipinfo.io during the Mustang Panda campaign. Adversaries reuse these non-browser agent strings for OAuth, folder enumeration and external IP discovery. Because legitimate Zoho software does not emit these exact tokens, the agents provide a reliable channel indicator.

Reporting behind it

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ZOHOMURK Non-Browser Zoho and IPFetcher User-Agents (via proxy)

Pivot detection · T1567.002 · 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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