Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5c36cfbebbc3484b…

MALICIOUS

Office (OLE)

30.0 KB Created: 2003-05-13 09:32:00 Authoring application: Microsoft Word 10.1
MD5: b2aefbf6fd0f77da1f1e6051fe90fd27 SHA-1: 5d5669c441c24a95c0fa531e6986ff5ae7ffcd5b SHA-256: 5c36cfbebbc3484bbba90e4a197b3835510ff3b4c0494b1e064823fc73d0e90e
180 Risk Score

Malware Insights

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

The sample is a Microsoft Word document containing a VBA macro that executes automatically via the Document_Open subroutine. The macro's logic appears to be designed to ensure its own persistence across documents and potentially download additional payloads, as indicated by the ClamAV detection 'Doc.Trojan.Thus-8'. The document body content is unrelated to the malicious functionality.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-8 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-8
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
751424cd5c191d02c834ae869229a0691bef79ca2be445c5356c5487df2955da		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2393 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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