Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f361b5737b83df90…

MALICIOUS

Office (OLE)

1.16 MB Created: 2010-05-19 19:38:00 Authoring application: Microsoft Word 11.3.8
MD5: a4710f45c1d923ba5a6f28f1774f98d4 SHA-1: a4faac92b508566033c7f065f25d09c988057bd6 SHA-256: f361b5737b83df900a988e4dea1a4c3941bbf1dc92c5c0f02131a3688924e1b9
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening a document. The document body itself contains educational text about Earth's crust, but includes a hyperlink that likely leads to a malicious site. The presence of the Document_Open macro suggests an attempt to automatically execute code, likely to download and run a secondary payload.

Heuristics 5

  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mediatheek.thinkquest.nl/~ll125/en/crust.htm
    • http://mediatheek.thinkquest.nl/~ll125/en/crust.htmMovement

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
499a61c006af4eec6814f286b42553d589a7dd8d2dbbeef03e5ac5104f8f31a5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2288 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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