Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7641ab14fb8a92c0…

MALICIOUS

Office (OLE)

61.0 KB Created: 2005-04-05 06:24:00 Authoring application: Microsoft Word 9.0
MD5: 3e3fec9d1e5732a10b05d6697e28c892 SHA-1: 5a92579a6c9017b2444cf7b88b8c2fe39979b124 SHA-256: 7641ab14fb8a92c0316c72282bd484e0cf18819d599e13be5caa24ab4835abfa
180 Risk Score

Malware Insights

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

The sample is a malicious Microsoft Word document containing VBA macros, specifically a Document_Open macro. The macro attempts to disable security features and manipulate the Normal template, likely to establish persistence or download a second-stage payload. The presence of the Document_Open macro and the nature of the VBA code strongly suggest a macro-based downloader, commonly used in phishing attacks.

Heuristics 4

  • ClamAV: Doc.Trojan.Flop-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Flop-2
  • 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
3a1ac2af18aa00fdafc0ca8d78739fd1b924752da6ca1e7faab763fa0fb9bf74		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 9535 bytes
Detection
ClamAV: Doc.Trojan.Flop-1
Obfuscation or payload: unlikely

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