Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 25f380dbd0cc7158…

MALICIOUS

Office (OLE)

39.0 KB Created: 2003-01-16 11:05:00 Authoring application: Microsoft Word 8.0
MD5: d284e41015212d5c9905d485da4fcdf0 SHA-1: 0e1e66843d3018f543e3d66a57ee812e47d9a7fd SHA-256: 25f380dbd0cc71587c2a188d1a4c90f0c98df0cede6328b07ea1bc7bd8f2a5c6
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell

The sample is a Microsoft Word document containing VBA macros. The critical heuristic OLE_VBA_SHELL indicates that the macros attempt to execute external commands via the Shell() function. The presence of ClamAV detections (Doc.Trojan.Marker-31 and Doc.Trojan.Marker-1) further confirms its malicious nature. The document body discusses marketing concepts, likely serving as a lure to encourage macro execution.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Trojan.Marker-31 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-31
  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
300962ac6f8cc1489890c62e227135b71a07dff98835588ce6eec589a648cc0c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 22244 bytes
Detection
ClamAV: Doc.Trojan.Marker-1
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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