Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 55a7bb8565e45ded…

MALICIOUS

Office (OLE)

40.0 KB Created: 2007-11-27 15:17:00 Authoring application: Microsoft Word 11.3.5
MD5: fe7ecaaa518e03f9964634ef6460d131 SHA-1: 89f36621651bcd3c738a7b7b677f68c6f5751e37 SHA-256: 55a7bb8565e45ded33a7432f69d46571115f41f904d1362d5ea8e49a6d923d78
180 Risk Score

Malware Insights

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

The file is an OLE document containing VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. The document body text is a generic message about catching up on schoolwork, likely a lure to encourage the user to enable macros. The presence of VBA macros and the Document_Open heuristic strongly suggest an attack pattern involving macro-based execution.

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
598c25bc17393868546b969d31af61ccf18dd312003b33a7cddd6c7d10add326		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4258 bytes
Detection
ClamAV: Doc.Trojan.Marker-2
Obfuscation or payload: unlikely

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