Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 4837e9e45c822a6f…

MALICIOUS

Office (OLE)

55.5 KB Created: 2010-03-11 13:35:00 Authoring application: Microsoft Word 11.5.6
MD5: d87213fdf9a830ceaeccdb135f811722 SHA-1: 38dc789f8bc7034a6774f7ffa4f2792079b8dcaa SHA-256: 4837e9e45c822a6f8d5d4d4ae473d68fd247775cd71d4dea5409497f95304c6b
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File

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 masquerades as an academic assignment to trick the user into enabling macros. The presence of a Document_Open macro suggests the intent is to automatically execute malicious code upon opening the document, likely to download and execute a secondary payload. 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
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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