Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 0435470166bea61a…

MALICIOUS

Office (OLE)

68.5 KB Created: 2009-10-20 20:25:00 Authoring application: Microsoft Word 11.5.3
MD5: 3c4b81a5a41a8911ec566c48a9849e6b SHA-1: 5e6e701a35fcbb22db4b70d87f84fcd9cfacf7c7 SHA-256: 0435470166bea61a578ffed1696527a6f0bc883ffcb11b73702a91d166a8834f
182 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature 'Doc.Trojan.Thus-8'. It contains a VBA macro within the 'macros.bas' file, triggered by the 'Document_Open' event. This macro attempts to disable virus protection and copy itself to the normal template, indicating an effort to establish persistence and download further malicious content. The document body itself is a lure related to soil science, designed to trick users into enabling macros.

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://nesoil.com/properties/horizons/sld001.htm
    • http://soil.gsfc.nasa.gov/app_soil/hmsoil.htm
    • http://soil.gsfc.nasa.gov/pvg/chartoc.htm
    • http://soils.cals.uidaho.edu/soilorders/orders.htm
    • http://www.apple.com/DTDs/PropertyList-1.0.dtd

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
25c979216a3e5338ffd12d5339c82e0857536b35ddcf09baeac483f2a0b7d4ba		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2366 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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