Malicious Office (OLE) / .DOCX — malware analysis report

Static analysis result for SHA-256 066632143da65ffe…

MALICIOUS

Office (OLE) / .DOCX

28.7 KB Created: 2000-01-31 02:02:00 Authoring application: Microsoft Word 9.0
MD5: 925a46a8c7d61dceb2f70ad006fe92e8 SHA-1: 700954be7c8d29176253bd0d64d6cc536cba02df SHA-256: 066632143da65ffe171749fa8bfc61816fbbd27b6726e558cb8d9725840b8d7a
180 Risk Score

Malware Insights

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

The sample contains VBA macros, specifically a Document_Open macro, which is a strong indicator of malicious intent. The macro code attempts to export itself to a file named 'no32close.sys' in the system directory, suggesting it's designed to download and execute a second-stage payload. The ClamAV detections further confirm its malicious nature.

Heuristics 4

  • ClamAV: Doc.Trojan.Closer-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Closer-1
  • 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
6bed57e752e1ec27e094f46221813b882d023d9f475e41bfe5df64c634d5b7f3		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1354 bytes
Detection
ClamAV: Doc.Trojan.Sxe-1
Obfuscation or payload: unlikely

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