Suspicious Side-Loaded D3D12_1core DLL Loaded by BellaCPP

ATT&CK techniques

Execution → Defense Evasion

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

What it detects

This rule detects loading of D3D12_1core.dll, a non-standard DLL side-loaded by the BellaCPP backdoor to execute its payload under a trusted host process. The name mimics legitimate Direct3D components but is not a genuine Windows library. Loading of this DLL indicates BellaCPP side-loading activity.

Reporting behind it

Related detections9 linkedT1574.001 — drag to rearrange

Malicious USERENV.dll Sideloaded by AppVShNotify.exe

Malicious CiscoSparkLauncher DLL Sideload From AppData via image_load

Malicious ESET Scanner Version DLL Sideloading via image_load

Suspicious libEGL.dll Side-Loading from Public Libraries Directory (via image_load)

Suspicious wlbsctrl.dll Sideloading via IKEEXT Service

Suspicious Side-Loading of wbemcomn.dll or ESENT.dll from Non-System Path (via image_load)

Suspicious MsMpEng Execution from Non-Standard Directory

Malicious DLL Side-Loading by 3CX Desktop Application (via image_load)

Malicious easinvoker.exe DLL Hijack from Public Libraries (via process_creation)

Suspicious Side-Loaded D3D12_1core DLL Loaded by BellaCPP

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.

Full detection rule

Unlock this rule to view and copy it

The detection logic is included with a plan. Everything else — context, mappings and implementation details — stays free on this page.

Sign in for 3 free unlocks

Signing in gives you 3 unlocks to spend on any rule in the library. No card, and they do not expire.

Also included

Unlocked rules convert on this page — to Splunk SPL or Splunk — Raw Index SPL or Microsoft Sentinel KQL or Microsoft Sentinel ASIM ASIM KQL or Microsoft Defender XDR KQL or Elastic Security KQL or Elastic Security Lucene or Elastic Security ES|QL or CrowdStrike Falcon CQL or SentinelOne PowerQuery or Palo Alto Cortex XDR XQL or Carbon Black Cloud Platform Search or Carbon Black EDR Process Search or Google Security Operations UDM Search or IBM QRadar AQL or Sumo Logic Cloud SIEM Rules expression or Rapid7 InsightIDR LEQL or Graylog Search or OpenSearch Lucene or OpenSearch PPL PPL or Grafana Loki LogQL or SQLite SQL or Zircolite SQLite — with the log-source profile the engine picked, the field map it used, and everything it could not express. Converting a rule you have unlocked costs no further credit.

See it run on a free rule →Convert your own rule →