Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1fcfb8c05cbc4d08…

MALICIOUS

Office (OLE)

70.5 KB Created: 2010-05-20 12:12:00 Authoring application: Microsoft Macintosh Word
MD5: 0e2d61d5f0bcb375250b24836452b178 SHA-1: 5f16ac2c064a0c23e8960d7484d5ca5c9e35a83b SHA-256: 1fcfb8c05cbc4d08c1c2c6d30a4c18bfc2d641bb635d6dcb45ccc226868fd373
180 Risk Score

Malware Insights

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

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for malicious Office documents. The document body presents itself as AP Chemistry course guidelines, likely a lure to encourage the user to interact with the document and potentially trigger the malicious macro. The macro is suspected to download and execute a second-stage payload from the embedded URLs. The ClamAV detection 'Doc.Trojan.Thus-8' further supports the malicious nature of the file.

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://overlyhchemistry.wiki.lovett.org/
    • http://www.electronicsinfoline.com/New/Science/home-chemistry-excerpt-keeping-a-lab-notebook.html
    • http://overlyhchemistry.wiki.lovett.org/boverly@lovett.org
    • http://www.swarthmore.edu/NatSci/cpurrin1/notebookadvice.htm
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ab38d5715787b7711b582609e10902f43d14cd400f2a740d07f11bcab3501f2c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2399 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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