Suspicious Outbound Network Connection from Explorer Process

ATT&CK techniques

Priv Esc → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1055Process Injection
Defense Evasion
- T1055Process Injection
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the Windows explorer.exe process establishing outbound network connections to external hosts which is anomalous because Explorer does not normally initiate internet beacons. In the Gamaredon campaign the Remcos backdoor injected into explorer.exe to blend command and control traffic with a trusted process.

Reporting behind it

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Suspicious Outbound Network Connection from Explorer Process

Pivot detection · T1055 · 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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