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Transparent COM instrumentation for malware analysis

ID: e951c847-e37d-503e-969b-6876ec8627b7

STIX ID: report--e951c847-e37d-503e-969b-6876ec8627b7

Feed Name: Cisco Talos

Date Published: 2026-03-18

Date Updated: 2026-04-27

Author: David Zimmer

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DispatchLogger is an open-source Windows DLL that instruments late-bound COM (IDispatch) interactions via transparent proxying and recursive object wrapping to provide semantic logging of script-based automation (VBScript, JScript, PowerShell). The report describes the interception strategy (CoCreateInstance/CoGetClassObject/CoGetObject hooks), implementation details, sample logs, deployment guidance, limitations (IDispatchEx, out-of-process COM, 64-bit testing), and use cases for analyzing WMI-based attacks, fileless/LOTL techniques, persistence mechanisms, and data exfiltration.

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