Suspicious winhlp32 Network Connection Indicating RemcosRAT Injection

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 winhlp32.exe establishing an external network connection, behavior the legacy help viewer never performs and used in the OnlyDcRatFans intrusion as the injection host for RemcosRAT command and control. An outbound connection from winhlp32 signals injected malicious code beaconing to an attacker server.

Reporting behind it

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Suspicious winhlp32 Network Connection Indicating RemcosRAT Injection

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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