Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 434e5c608d114828…

MALICIOUS

Office (OLE)

93.0 KB Created: 1999-11-12 18:17:00 Authoring application: Microsoft Word 8.0 First seen: 2012-06-14
MD5: ab0e96d16515cad1dd45b0b098081d75 SHA-1: 369d17a8351d63f3c2e6db8ea4a325f2c4f80ec2 SHA-256: 434e5c608d11482825073c0244bffe25e20d8367c813ba9f93cb9dd50124bac7
160 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Doc.Trojan.Jug-1. Static analysis revealed the presence of VBA macros, specifically a Document_Open and Workbook_Open macro, indicating a likely attempt to execute malicious code upon opening the document. The macros are heavily obfuscated, but their presence and the high severity heuristics suggest the primary function is to download and execute a secondary payload.

Heuristics 4

  • ClamAV: Doc.Trojan.Jug-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Jug-1
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_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) 93055 bytes
SHA-256: 402394a15732d3bfef2124069783871e548d8b133d3c051a53e5d158205e88b3
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
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