Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 df364143aeccb05f…

MALICIOUS

Office (OLE)

100.0 KB Created: 2009-08-23 21:21:00 Authoring application: Microsoft Word 11.2
MD5: b3b9cc9dee6f2790c35ad02e00f7ad83 SHA-1: 9cf454d5318402e991816459c0a823bfe7089643 SHA-256: df364143aeccb05f9410b6ed48baa7d20093363f4e26dd043def3d91904f68ba
240 Risk Score

Malware Insights

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

The file contains a VBA macro that utilizes the Shell() function, indicating an attempt to execute external commands. The ClamAV detection and static triage heuristics further confirm its malicious nature. The presence of 'macros.bas' suggests a macro-based downloader. The document body text appears to be unrelated educational content, likely a lure.

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
2637b14e6c3dd6aec28c8da77bfb2d97d284e2840689f78203791dbc6b70f487		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6941 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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