The SECRET to Embedding Metasploit Payloads in VBA Macros

The SECRET to Embedding Metasploit Payloads in VBA Macros

🎙 HackerSploit 👥 1.0M 📅 February 12, 2025 ⏱ 15 min 👁 9K 📄 tutorial 🧭 2026-10-09
Available in: English (current) Français

Keywords

msfvenomVBA macroHTAreverse shellPowerShell stager

Summary

This video is the final installment of HackerSploit’s Offensive VBA series focused on Word macros before the channel returns to the FIN6 adversary emulation track. The presenter demonstrates how to take a payload generated by msfvenom — specifically a PowerShell HTA stager — and embed it into a custom VBA macro rather than relying on Metasploit’s automated macro module. The workflow begins on a Windows VM with RDP access to a Kali Linux system. A macro-enabled .docm document is created in Word, with an AutoOpen subroutine calling a custom ‘my macro’ routine. On Kali, msfvenom generates a non-staged reverse TCP shell payload in power-hta format, saved as shell.hta. The presenter opens the HTA file in a text editor to show the heavily obfuscated and base64-encoded PowerShell command it contains, then uses CyberChef to decode and inspect the underlying logic, including environment variable checks for PowerShell.exe and execution policy flags. Because the raw payload cannot be pasted directly into VBA, a Python script is written to concatenate the payload string into multiple VBA-compatible lines using a loop with a fixed iteration count. The formatted output is then pasted into the macro, which uses WScript.Shell.Run to execute the string. A netcat listener on port 1337 receives the reverse shell when the document is opened and macros are enabled. The presenter notes the series will continue with more advanced topics such as Windows API abuse.

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Critical Evaluation

Value of the Information & Strength of the Argument

The informational value lies in the practical bridge it builds between two commonly siloed techniques: C2 payload generation and Office macro weaponization. Rather than using Metasploit’s automated VBA injection module, the presenter shows how to manually extract, decode, reformat, and embed a payload, which gives the viewer a transferable skill applicable to any C2 framework or payload type. The argumentation is procedural rather than rhetorical: each step is demonstrated live, with the reasoning explained (e.g., why the raw payload cannot be pasted directly, why a Python concatenation script is needed, why CyberChef is useful for understanding Metasploit’s encoding layers). The demonstration is coherent and the end-to-end result — a working reverse shell — validates the method. The main limitation is depth: the presenter acknowledges the payload is obfuscated but does not fully dissect the encoding chain, and the Python script is shown briefly without detailed explanation of edge cases such as payload length or character escaping. The video assumes prior familiarity with the series and with basic offensive tooling, so it functions as a capstone demonstration rather than a standalone tutorial.

Scientific Rigor, Source Quality, Title Accuracy

No external sources, documentation, or academic references are cited. The only links in the description are to the channel’s own platforms (Cyber Ranges labs, podcast feeds, a feedback form) and affiliate/sponsor links, none of which constitute technical references for the demonstrated technique. The presenter references prior episodes of the Offensive VBA series and the FIN6 adversary emulation series as context, but does not link to them explicitly in the description. The technical claims are self-validated through live demonstration, which is a reasonable standard for a tutorial but not equivalent to sourced rigor. Regarding title/content adequacy, the title is accurate in substance — the video does show how to embed a Metasploit payload in a VBA macro — though the word ‘secret’ overstates the novelty, as the technique is a standard red team practice. No comments were provided for analysis.

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Title / Content Match

The title accurately reflects the content: the video demonstrates how to take a Metasploit-generated HTA/PowerShell payload and embed it into a VBA macro. The word 'secret' is somewhat sensationalized, but the core promise is delivered.

Quality & Reliability

7/10

The video is a hands-on technical demonstration by an experienced practitioner. The workflow shown (msfvenom payload generation, Python-based string concatenation, VBA macro embedding, netcat listener) is reproducible and internally consistent. However, no external references, documentation, or academic sources are cited, and the technique is presented without discussion of detection, OPSEC, or defensive countermeasures. Reliability rests on the demonstrator's practical credibility rather than on verifiable sourcing.

Key Moments

Cited Sources

Concurring Sources

Contribution & Novelties

The video’s original contribution is a manual, framework-agnostic method for embedding C2 payloads into VBA macros, contrasting with the automated Metasploit module commonly used in red team training. By showing the full pipeline — payload generation, decoding with CyberChef, Python-based reformatting, and VBA integration — it demystifies what the automated module does under the hood and gives practitioners a reusable technique for any payload type or C2 framework. The use of a simple Python concatenation script to solve the VBA line-length and formatting problem is a practical trick that is not widely documented in beginner-oriented red team content.

Pour aller plus loin :

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Radar Profile

The profile is strongly skewed toward technical depth and practical applicability, with high scores in technical level and solid information quantity. Reliability is good but not maximal due to the absence of external sourcing or defensive context. The overall shape reflects a hands-on offensive security tutorial rather than a research or analytical piece.

Reliability 7/10