Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 bfab75badfb1e10d…

MALICIOUS

Office (OLE)

59.5 KB Created: 2009-03-02 21:38:00 Authoring application: Microsoft Word 10.1
MD5: 48f550063c87faa4bea03f41eb0f5a3d SHA-1: c19b718d3d8c58b2981b97cecc754efe42bb7acf SHA-256: bfab75badfb1e10dda39eddb3a8e87a4f6b3752fd37ac4a8edd51d3aaf636b79
240 Risk Score

Malware Insights

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

The file is a Microsoft Word document containing VBA macros, as indicated by the OLE_VBA_MACROS heuristic. The presence of a critical OLE_VBA_SHELL firing suggests that the macros attempt to execute external commands. ClamAV detections (Doc.Trojan.Marker-31 and Doc.Trojan.Marker-3) further confirm its malicious nature. The document body, a form for an 'Off-Campus Physical Education Application', appears to be 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
51bcae47cfb10db9d81877f90b57b49804cb8d84ec0f3ee82ece9736f34034d4		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6815 bytes
Detection
ClamAV: Doc.Trojan.Marker-3
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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