Possible Gamaredon C2 via Ephemeral Tunneling and Worker Services

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1102Web Service
- T1572Protocol Tunneling
Exfiltration
Impact

What it detects

This rule detects DNS resolution of ephemeral tunneling and serverless worker domains abused by Gamaredon in 2025 for command-and-control, including trycloudflare.com, workers.dev, devtunnels.ms and loophole.site. The group routes implant traffic through these disposable services to hide infrastructure behind trusted providers. Detecting these lookups is useful for spotting covert C2, while acknowledging that developers also use these tunneling services legitimately.

Reporting behind it

Related detections9 linkedT1102 — drag to rearrange

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Windows: Detect cloudflared tunnel cleanup command execution

Windows Process Creation: cloudflared Tunnel Execution with Config and Credentials Flags

Linux network connections to ngrok tunneling endpoints

Windows Executable Initiating Connections to ngrok Tunnel Domains

Windows Process Initiated Connections to Ngrok Domains

Possible Gamaredon Dead-Drop C2 via Telegraph and GoFile Web Services

Possible Gamaredon C2 via Ephemeral Tunneling and Worker Services

Pivot detection · T1102 · 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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