Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5c3cb479c41fa472…

MALICIOUS

Office (OLE)

369.5 KB Created: 1997-08-20 14:47:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: 3ac254c040ca50e4794d8aea0da366a2 SHA-1: 27391e4c6f6a4a589422fdf0a27214ab7ea6e4c7 SHA-256: 5c3cb479c41fa472fecbd742dea85d2425377a683005e31fbbe17246b366a4e5
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is a legacy Word document containing a WordBasic autoOpen macro. This macro is designed to execute automatically upon opening the document, indicating a malicious intent to run arbitrary code. The presence of the autoOpen marker and the macro itself strongly suggests this is a malicious document, likely a downloader or part of a larger attack chain.

Heuristics 4

  • ClamAV: Doc.Trojan.Wazzu-9 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Wazzu-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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 61063 bytes
SHA-256: 9694f0b952096472b03694aa01553403c9961934641eaf07fbd8f59a48eb2827
Detection
ClamAV: Doc.Trojan.Wazzu-9
Obfuscation or payload: unlikely
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "autoOpen"

' Microsoft WordBasic : Default model application
' Main purpose        : Ensuring a constant opening of each file
'                       with "normal.dot"
'
'                       For Microsoft Word Version 6.0
'                       Copyright 83-93 Microsoft Corporation
























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































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