Hasher¶
What Hasher does¶
Using this tool
Hasher supports analyst workflow support. In this guide, you will use it to calculate and compare hashes for original, working, and derived training files. Follow the steps below and keep the output with your notes.
Tool guide at a glance¶
Calculate and compare hashes for original, working, and derived training files.
Clearly labelled working copies and a separate controlled output directory.
A reproducible supporting result with input, transformation, output, and integrity context.
Evidence and safety
Keep original, working, and derived material separate. Treat links, archives, and files as untrusted when appropriate. Record the input identifier, tool version, relevant commands or settings, time and time zone, output location, and any errors or limitations as you work.
Choose your journey¶
01Understand the evidenceLearn the analyst workflow support concepts and limitations.Complete when you can explain what the evidence can and cannot show.Beginner · No tool required 02Follow the Hasher guideFollow the steps and screenshots below.Complete when the documented workflow produces its expected output.Guided · SUSA workstation · Time varies 03Interactive labPractise the tool workflow in a safe browser simulation.Complete when the guided result is supported by the case evidence.Beginner · Browser only 04Full LabUse your own training data, keep the output and explain what you found.Complete when another analyst can reproduce and verify the outcome.Intermediate · Isolated lab
How the labs complement this guide
The Interactive Lab uses example records to practise investigation decisions. It does not run the installed tool or establish how that version behaves. The Full Lab uses your own training environment and evidence. Obtain or create the required input before starting; a case name in an exercise is not a download.
Accessing Hasher in SUSA¶
Hasher is a small utility by Eric Zimmerman used to calculate cryptographic hash values for files and text.
Hash the source and working copy before analysis, record the algorithm used and compare the values exactly. A matching hash supports integrity between those two states; it does not establish that a file is benign, authentic or correctly attributed.
The tool is available in C:\Tools\Zimmerman Tools\Hasher.