Possible SPECTRALVIPER C2 Communication via Crafted Consent Cookie Values

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.001Web Protocols
- T1573Encrypted Channel
Exfiltration
Impact

What it detects

This rule detects HTTP requests whose Cookie header simultaneously carries the euconsent-v2 and zd_cs_pm values used by the SPECTRALVIPER backdoor to smuggle command-and-control host information. The technique is tied to the OceanLotus (APT32) espionage campaign that masquerades C2 metadata inside cookies resembling GDPR consent and support tracking tokens. Identifying this combined cookie pattern matters because it exposes encrypted C2 traffic hidden inside otherwise benign-looking web requests.

Reporting behind it

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Possible SPECTRALVIPER C2 Communication via Crafted Consent Cookie Values

Pivot detection · T1071.001 · 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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