> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/fr/windows-vulnerabilities/binary-analysis/userinfo-exe-binary-analysis.md).

# Analyse binaire de UserInfo.exe

Cette note montre un simple Windows `.NET` flux de travail d'analyse binaire : exécution contrôlée, observation du comportement et inspection avec dnSpy pour récupérer des informations sensibles.

## Préparation

Préparez l'environnement de laboratoire, transférez l'archive et configurez la résolution des noms si nécessaire.

<figure><img src="/files/d3a3801c557abd7d164872823822f1958b4f2168" alt="UserInfo.exe lab preparation"><figcaption></figcaption></figure>

<figure><img src="/files/01b8845596670d271862d9dd3528818b2f97d9d7" alt="UserInfo.exe archive transferred"><figcaption></figcaption></figure>

## Exécution contrôlée

```powershell
./UserInfo.exe find -first * -last *
```

<figure><img src="/files/31d08d823f336ec093aca7ad899a5e6e0c2a4aed" alt="UserInfo.exe controlled execution"><figcaption></figcaption></figure>

## Analyser avec dnSpy

{% embed url="<https://github.com/dnSpy/dnSpy>" %}

<figure><img src="/files/77150beafd53c9c5803cf3c7d0ced7e4fa481380" alt="UserInfo.exe opened in dnSpy"><figcaption></figcaption></figure>

Recherchez des chaînes, des fonctions d'authentification, des points de terminaison et des secrets codés en dur.

<figure><img src="/files/d66fe6946f7c97a676499b0e0b469827d5d7ab5f" alt="Searching UserInfo.exe code in dnSpy"><figcaption></figcaption></figure>

Placez un point d'arrêt près du chemin de code où le secret devient lisible.

<figure><img src="/files/86964ebeb9253012b7ad9aa2a6835dba2560869c" alt="Breakpoint set in dnSpy"><figcaption></figcaption></figure>

<figure><img src="/files/437a20df98ac0847258dc43f88515973d5625e32" alt="Recovered runtime secret in dnSpy"><figcaption></figcaption></figure>

## Points clés

* `.NET` les binaires sont souvent faciles à décompiler.
* Les secrets codés en dur doivent être considérés comme compromis.
* L'analyse statique doit être associée à une exécution contrôlée dans un laboratoire.


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