Windows.EventLogs.Hayabusa

Hayabusa is a Windows event log fast forensics timeline generator and threat hunting tool.

This artifact runs Hayabusa on the endpoint against the specified Windows event log directory, and generates and uploads a single CSV file for further analysis with excel, timeline explorer, elastic stack, etc.

name: Windows.EventLogs.Hayabusa
description: |
   [Hayabusa](https://github.com/Yamato-Security/hayabusa) is a
   Windows event log fast forensics timeline generator and threat
   hunting tool.

   This artifact runs Hayabusa on the endpoint against the specified
   Windows event log directory, and generates and uploads a single CSV
   file for further analysis with excel, timeline explorer, elastic
   stack, etc.

author: Eric Capuano - @eric_capuano, Whitney Champion - @shortxstack, Zach Mathis - @yamatosecurity

tools:
 - name: Hayabusa-2.3.3
   url: https://github.com/Yamato-Security/hayabusa/releases/download/v2.3.3/hayabusa-2.3.3-win-64-bit.zip
   expected_hash: bacf8596bf94715c85017f1a4236c5488de5573a0987742c20421f6e958e1ff0
   version: 2.3.3

precondition: SELECT OS From info() where OS = 'windows'

parameters:
 - name: UTC
   description: "Output time in UTC format"
   type: bool
   default: Y
 - name: UpdateRules
   description: "Update rules before scanning"
   type: bool
   default: Y
 - name: NoisyRules
   description: "Enable rules marked as noisy"
   type: bool
   default: N
 - name: OutputProfile
   description: "Decide how much data you want back"
   default: standard
   type: choices
   choices:
     - minimal
     - standard
     - verbose
     - all-field-info
     - all-field-info-verbose
     - super-verbose
     - timesketch-minimal
     - timesketch-verbose
 - name: EIDFilter
   description: "Scan only common Event IDs for quicker scans"
   type: bool
   default: N
 - name: MinimalLevel
   description: "Minimum level for rules"
   default: informational
   type: choices
   choices:
     - informational
     - low
     - medium
     - high
     - critical
 - name: Threads
   description: "Number of threads"
   type: int
   default: 2

sources:
 - name: Upload
   query: |
        -- Fetch the binary
        LET Toolzip <= SELECT FullPath
        FROM Artifact.Generic.Utils.FetchBinary(ToolName="Hayabusa-2.3.3", IsExecutable=FALSE)

        LET TmpDir <= tempdir()

        -- Unzip the binary
        LET _ <= SELECT *
        FROM unzip(filename=Toolzip.FullPath, output_directory=TmpDir)

        LET HayabusaExe <= TmpDir + '\\hayabusa-2.3.3-win-x64.exe'

        -- Optionally update the rules
        LET _ <= if(condition=UpdateRules, then={
        SELECT * FROM execve(argv=['cmd.exe', '/c', 'cd', TmpDir, '&', HayabusaExe, 'update-rules']) })

        LET CSVFile <= TmpDir + '\\hayabusa_results.csv'

        -- Build the command line considering all options
        LET cmdline <= filter(list=(
          HayabusaExe, "csv-timeline", "--live-analysis",
          "--output", CSVFile,
          "--min-level", MinimalLevel,
          "--profile", OutputProfile,
          "--quiet", "--no-summary",
          "--threads", str(str=Threads),
          if(condition=UTC, then="--UTC"),
          if(condition=NoisyRules, then="--enable-noisy-rules"),
          if(condition=EIDFilter, then="--eid-filter")
        ),  regex=".+")

        -- Run the tool and divert messages to logs.
        LET ExecHB <= SELECT *
        FROM execve(argv=cmdline, sep="\n", length=9999999)
        WHERE log(message=Stdout)

        -- Upload the raw file.
        SELECT upload(file=CSVFile) AS Uploads FROM scope()

 - name: Results
   query: |
        SELECT *, timestamp(string=Timestamp) AS EventTime
        FROM parse_csv(filename=CSVFile)