Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7c37e5400f65d0d9…

MALICIOUS

Office (OLE)

42.0 KB Created: 2010-01-26 14:18:00 Authoring application: Microsoft Word 11.5.6
MD5: 8504f7b329400ae8bccd10cea4b2bb28 SHA-1: a5709951973e8c3ebde3e854dcf7a2e7b589cd7d SHA-256: 7c37e5400f65d0d9614cfceb9f9b981faf4ecced1b926d15b376bd76beecbdf1
180 Risk Score

Malware Insights

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

The file is an OLE document containing VBA macros, specifically a Document_Open macro, which is a common delivery mechanism for malware. ClamAV detections further confirm its malicious nature. The presence of a Document_Open macro suggests the intent is to execute malicious code automatically when the document is opened, likely to download and execute a secondary payload. No specific family could be identified.

Heuristics 4

  • ClamAV: Doc.Trojan.Marker-40 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-40
  • 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
4d840735f64370eed491ae174d4c3cebc63d105512970d4d44c50b8d8ee19f18		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4261 bytes
Detection
ClamAV: Doc.Trojan.Marker-2
Obfuscation or payload: unlikely

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