Windows.Applications.DefenderQuarantineExtract

Extracts Quarantine Files from Windows Defender.

This artifact decrypts the RC4 encrypted Windows Defender Quarantined files and returns information about it. If it is a PE, it also parses the PE.

You may also choose to upload the extracted binaries for deeper malware analysis.

name: Windows.Applications.DefenderQuarantineExtract
author: "Eduardo Mattos - @eduardfir, @niicolaa"
description: |
   Extracts Quarantine Files from Windows Defender.

   This artifact decrypts the RC4 encrypted Windows Defender Quarantined files
   and returns information about it. If it is a PE, it also parses the PE.

   You may also choose to upload the extracted binaries for deeper malware analysis.

reference:
  - https://reversingfun.com/posts/how-to-extract-quarantine-files-from-windows-defender
  - https://blog.fox-it.com/2023/12/14/reverse-reveal-recover-windows-defender-quarantine-forensics/
  - https://artefacts.help/windows_defender_quarantine.html

type: CLIENT

parameters:
   - name: TargetGlob
     description: Target Files
     default: C:/ProgramData/Microsoft/Windows Defender/Quarantine/ResourceData/*/*
   - name: UploadDecodedFiles
     description: Select to upload decoded quarantined files.
     type: bool
   - name: DefenderRC4KeyHex
     default: "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"

sources:
  - query: |
       LET Targets = SELECT Mtime,
                            Name,
                            OSPath
         FROM glob(globs=TargetGlob)
       LET DefenderRC4Key = unhex(string=DefenderRC4KeyHex)
       LET Decrypted = SELECT Name,
                              OSPath,
                              Mtime,
                              read_file(
                                filename=crypto_rc4(
                                  key=DefenderRC4Key,
                                  string=read_file(filename=OSPath, accessor="file")),
                                accessor="data") AS Plain
         FROM Targets
       LET Profile <= '''
        [
          ["Root", 0, [
            ["SDLen", 8, "uint32"],
            ["HeaderLen", 0, "Value", {"value": "x=>0x28 + x.SDLen"}],
            ["MalLen", "x=>x.SDLen + 0x1C", "uint64"],
            ["DecodedFile", 0, "Value", {
              "value": "x=>read_file(filename=Plain, accessor='data', offset=x.HeaderLen, length=x.MalLen)"
            }],
            ["UnparsedFooter", 0, "Value", {
              "value": "x=>read_file(filename=Plain, accessor='data', offset=x.HeaderLen + x.MalLen)"
            }]
          ]]
        ]'''
       LET Trimmed <= SELECT 
                             Name,
                             OSPath,
                             Mtime,
                             Plain,
                             parse_binary(
                               filename=Plain,
                               accessor="data",
                               profile=Profile,
                               struct="Root") AS Parsed
         FROM Decrypted
         
       SELECT 
              magic(
                path=Parsed.DecodedFile,
                accessor="data") AS Magic,
              hash(
                path=Parsed.DecodedFile,
                accessor="data") AS Hash,
              Name,
              OSPath,
              Mtime,
              Parsed.MalLen AS MalfileLen,
              Parsed.UnparsedFooter AS UnparsedFooter,
              parse_pe(
                file=Parsed.DecodedFile,
                accessor="data") AS ParsedPE,
              if(
                condition=UploadDecodedFiles,
                then={
                  SELECT 
                         upload(
                           file=Parsed.DecodedFile,
                           accessor="data",
                           name=Name + "_Defender_Quarantine_Extract.bin") AS FileDetails
                  FROM Trimmed
                }) AS Upload
       FROM Trimmed