Malicious DtlCrashCatch DLL Side-Loading via OneDrive Sync Service by SPECTRALVIPER

ATT&CK techniques

Execution → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
- T1574.001DLL
Persistence
- T1574.001DLL
Priv Esc
- T1055Process Injection
- T1574.001DLL
Defense Evasion
- T1055Process Injection
- T1574.001DLL
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the OneDrive.Sync.Service.exe process loading DtlCrashCatch.dll, a side-loaded and injected module used by the SPECTRALVIPER backdoor. This activity is associated with the OceanLotus (APT32) espionage campaign that abuses a trusted signed OneDrive binary for DLL search-order hijacking. Catching this specific side-load is important because it reveals code injection and stealthy execution under a legitimate process context.

Reporting behind it

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Malicious DtlCrashCatch DLL Side-Loading via OneDrive Sync Service by SPECTRALVIPER

Pivot detection · T1574.001 · 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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