Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8cb6ade765cd2352…

MALICIOUS

Office (OLE)

293.5 KB Created: 2009-10-28 16:01:00 Authoring application: Microsoft Word 11.5.5
MD5: f2855af2cc4aa9d529cb59bc25f9c4fd SHA-1: 4aec9b25466d88d8f545fc0b1add42994d23580c SHA-256: 8cb6ade765cd235223736f1d60e11bcb3678ec38dd571d02c49851c2d4121cb7
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic 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 discusses H1N1 flu clinics and backpack safety, likely a lure to encourage users to enable macros. The presence of a Document_Open macro and the ClamAV detection of 'Doc.Trojan.Thus-8' strongly indicate malicious intent. No specific family could be identified, but the execution method is typical of macro-based malware.

Heuristics 4

  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
60171481be85981ab4472fcbcb815c7c710a78dbcf0f51b86e6ec002585f4b86		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2384 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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