Adversaries may use utilities to compress and/or encrypt collected data prior to exfiltration. Many utilities include functionalities to compress, encrypt, or otherwise package data into a format that is easier/more secure to transport.

Adversaries may abuse various utilities to compress or encrypt data before exfiltration. Some third party utilities may be preinstalled, such as tar on Linux and macOS or zip on Windows systems.

On Windows, diantz or makecab may be used to package collected files into a cabinet (.cab) file. diantz may also be used to download and compress files from remote locations (i.e. Remote Data Staging).^[1] xcopy on Windows can copy files and directories with a variety of options. Additionally, adversaries may use certutil to Base64 encode collected data before exfiltration.

Adversaries may use also third party utilities, such as 7-Zip, WinRAR, and WinZip, to perform similar activities.^[2],[3],[4]

References

1. Living Off The Land Binaries, Scripts and Libraries (LOLBAS). (n.d.). Diantz.exe. Retrieved October 25, 2021.
2. I. Pavlov. (2019). 7-Zip. Retrieved February 20, 2020.
3. A. Roshal. (2020). RARLAB. Retrieved February 20, 2020.
4. Corel Corporation. (2020). WinZip. Retrieved February 20, 2020.

Verknüpfte Vorgänge

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