# Prefetch Files Forensics

Prefetch forensics refers to analyzing Windows Prefetch files, which provide insights into application usage on a system. Prefetch files are created by Windows to improve the performance of applications by preloading data. They track executable files when they are run

### location : C:\Windows\Prefetch\\

### Key Aspects of Prefetch Analysis

1. **Understanding Prefetch Files**: Prefetch files have the extension `.pf` and are named after the executable they represent, along with a hash of the path. For example, `notepad.exe` might have a file named `NOTEPAD.EXE-XXXXXXXX.pf`.
2. **Execution Times**: Prefetch files store the last 8 run times, helping investigators determine how often and when a program was executed.
3. **Associated DLLs and Resources**: Prefetch files contain a list of DLLs and other resources the program loaded, which can indicate dependencies and how the program interacted with the system.
4. **Size and Hashing**: The size of the Prefetch file can vary with different Windows versions. Starting from Windows 8, files also include volume creation date and hashing information

<figure><img src="/files/AINvn7pLJm4AdCAFoNcs" alt=""><figcaption></figcaption></figure>

### Structure

Include metadata about the executed program, such as:

* Program name and path.
* Last execution timestamp.
* Number of times the program was executed.
* Loaded module (DLL) paths used by the application

### **Forensic Significance**

1. **Program Execution Evidence**
   * Prefetch files can confirm whether a program was executed, even if the program itself has been deleted.
   * Useful in cases where malware was executed but later removed.
2. **Execution Timeline**
   * Last execution timestamp helps build a timeline of activity.
   * Frequency of execution reveals patterns of use.
3. **File and Directory Discovery**
   * Paths and filenames of associated files or libraries (DLLs) loaded by the program provide additional clues.
4. **Artifact of Anti-Forensics**
   * Absence of expected prefetch files might indicate the system was tampered with or an anti-forensic tool was used

**Tools**

* **Eric Zimmerman's PECmd**: Parse Prefetch files for detailed analysis.
* **Windows Prefetch Parser (wpf)**: Extract metadata and module information.

Here I used **PECmd tool** and look what I got&#x20;

<figure><img src="/files/oZLA25acdn4ZDc8KqwHZ" alt=""><figcaption></figcaption></figure>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://mahmoud-shaker.gitbook.io/dfir-notes/prefetch-files-forensics.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.