Suspicious Delphi Runtime DLL Side-Loading by Ahnenblatt Host Process

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 the Ahnenblatt application loading the Borland Delphi runtime DLLs borlndmm.dll or cc32290mt.dll from a user-writable directory. The RenEngine campaign side-loaded these DLL names to execute the HijackLoader stage under a trusted signed process as documented by Kaspersky. Loading these runtime libraries from Temp or AppData indicates DLL search-order hijacking used to run malicious code with a benign parent.

Reporting behind it

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Suspicious Delphi Runtime DLL Side-Loading by Ahnenblatt Host Process

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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