Suspicious Outbound Network Connection from Windows Dialer Process

ATT&CK techniques

Priv Esc → C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1055Process Injection
Defense Evasion
- T1055Process Injection
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.001Web Protocols
Exfiltration
Impact

What it detects

This rule detects the legitimate Windows dialer.exe process in System32 initiating outbound network connections which is anomalous because the tool is rarely executed and does not normally beacon. In the copyright infringement infostealer campaign the loader injected shellcode into system32 dialer.exe to proxy command and control traffic making dialer network activity a strong compromise signal.

Reporting behind it

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Suspicious Outbound Network Connection from Windows Dialer Process

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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