Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1f33096208feb03e…

MALICIOUS

Office (OLE)

52.5 KB Created: 2010-01-12 16:59:00 Authoring application: Microsoft Word 11.5.6
MD5: 3008e3c23212f2332fd17295bfc5c789 SHA-1: 3423796b03b77b24ad6e2a38b508431ab1109fdf SHA-256: 1f33096208feb03e34203e589d2c6d9ad2b5c83046282077772db196e3a91ccc
180 Risk Score

Malware Insights

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

The file is a Microsoft Word document containing VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. The document body is formatted as a school assignment, suggesting a social engineering lure to encourage users to enable macros. The presence of a Document_Open macro indicates an attempt to automatically run malicious code upon opening the document. The ClamAV detections further confirm its malicious nature.

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
8fd64a9fd248372ccfd0ec25ae80012332a41b46ec60b12a1b42f1e8fb27117c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4245 bytes
Detection
ClamAV: Doc.Trojan.Marker-2
Obfuscation or payload: unlikely

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