Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 660e2051c929a38c…

MALICIOUS

Office (OLE)

41.0 KB Created: 2007-10-03 00:59:00 Authoring application: Microsoft Word 11.3.5
MD5: a3466b02c613f85d3bd51537098dc3cb SHA-1: 5e7f245b981fad550d51959f6d3d23fe13f8cd77 SHA-256: 660e2051c929a38cb1a5dd50376fed556f9943b71b5c13be95bd2b6c2b969a5d
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The sample contains a VBA macro that executes automatically via the Document_Open event. This macro attempts to disable virus protection and copy itself to the Normal template and other open documents, indicating a persistence and spreading mechanism. The ClamAV detection of 'Doc.Trojan.Thus-5' further supports its malicious nature.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-5 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-5
  • 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
5f3a97e4fb281c182a72f372fc3fa336cfd5e05720d991c712b1da70b22d3ac6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2343 bytes
Detection
ClamAV: Doc.Trojan.Thus-5
Obfuscation or payload: unlikely

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