> For the complete documentation index, see [llms.txt](https://sarpers-organization.gitbook.io/ctftricks/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sarpers-organization.gitbook.io/ctftricks/_chapter-intro-5/malware-analysis/trick-0422.md).

# Deobfuscate PowerShell Script

***

You can deobfuscate PowerShell scripts, often found in malware analysis or forensics challenges, to reveal their underlying logic and embedded data. A specific tool like PowerDecode is effective for this. PowerDecode is a PowerShell script decoder dedicated to malware analysis. It takes as input an obfuscated PowerShell script, either as a file or directly as a string. The output is the deobfuscated script.

Using PowerDecode, you can provide the obfuscated `.ps1` file as input using the `-f` or `--filename` option:

```bash
python powerdecode.py -f obfuscated_script.ps1
```

Alternatively, you can provide the script content directly using the `-s` or `--script` option:

```bash
python powerdecode.py -s "powershell -e JABhACAAPQAgACcAVwByAGkAdABlAC0ASABvAHMAdAAgACgAJwBIAGUAbABsAG8AIABXAG8AcgBsAGQAIQAnACkAJwA7ACAAZQB4AGUAYwAgACgAJABhACkA"
```

You can also specify an output file for the deobfuscated script using the `-o` or `--output` option:

```bash
python powerdecode.py -f obfuscated.ps1 -o deobfuscated.ps1
```

The tool also supports a verbose output mode via the `-v` option. The full usage details are available via the help flag:

```
usage: powerdecode.py [-h] [-f FILENAME] [-s SCRIPT] [-o OUTPUT] [-v]

options:
  -h, --help            show this help message and exit
  -f FILENAME, --filename FILENAME
                        Input filename
  -s SCRIPT, --script SCRIPT
                        Input script
  -o OUTPUT, --output OUTPUT
                        Output filename
  -v, --verbose         Verbose output
```

This process helps uncover the script's true purpose, such as revealing loader logic or hidden payloads, which is essential for further analysis.