Scripting the Disassembler: vbdec’s Live COM Object Model Exposes Full Binary Metadata to Any Local Process
What Happened — The reverse‑engineering tool vbdec can be configured to register its parsed VB6 project in the Windows Running Object Table (ROT). Once enabled, any local script can obtain a live COM reference (GetObject("vbdec.vbp")) and query the entire project structure—including forms, classes, P‑code, and embedded strings—without opening the GUI. The blog also ships an AI‑agent support package that describes the object model for automated agents.
Why It Matters for Compliance & Audit Readiness
- The ability to expose a full internal object model via ROT is a classic control‑gap that can be abused by malicious scripts to harvest proprietary code or intellectual property.
- SOC 2 Security (CC6.1) and Confidentiality (CC6.2) controls require documented configuration baselines and continuous monitoring of privileged interfaces; this scenario illustrates why those baselines must include COM‑exposure settings.
- Verisq’s Control Mapping capability can automatically map the ROT exposure to your SOC 2 control set, collect evidence of configuration state, and provide audit‑ready proof that the risk has been mitigated.
Who Is Affected — Software development teams, security analysts, and any organization that uses Windows‑based reverse‑engineering or binary‑analysis tools (primarily TECH_SAAS and PROF_SERV sectors).
Recommended Actions
- Review and harden the tool’s “Enable Remote Scripting” setting; disable it unless a documented business need exists.
- Add the ROT exposure to your asset inventory and map it to SOC 2 CC6.1/CC6.2 controls.
- Implement continuous monitoring (e.g., endpoint detection or configuration‑management tooling) to detect unauthorized COM registrations.
- Document the configuration change in your risk‑assessment artifacts and retain evidence for audit review.
Source: Cisco Talos – Scripting the Disassembler
Technical Notes
- The ROT is a system‑wide COM directory; any process with local privileges can query registered monikers.
- No CVE is associated; the risk stems from an exposed API rather than a software bug.
- Data exposed includes full VB6 source‑level metadata, which can aid both legitimate analysis and malicious reverse engineering.