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

Static analysis result for SHA-256 36802e42dd41b041…

MALICIOUS

Office (OLE) / .DOCX

37.5 KB Created: 1999-08-24 12:38:00 Authoring application: Microsoft Word 8.0
MD5: d9c963f8a442033abff0567bab5d374a SHA-1: f67dba05f0b60e9c55e8d9d11f8067ea00dd59bf SHA-256: 36802e42dd41b04133e485e2896ce4382406d4779a7a7b194a23c92fb6c8bc52
180 Risk Score

Malware Insights

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

The file contains embedded VBA macros, specifically a Document_Open subroutine, which is a common technique for initial execution. The script attempts to clear existing macros and then writes new malicious content to 'c:\cont.dbl'. This behavior is indicative of a downloader or dropper, aiming to establish a malicious payload. The ClamAV detections 'Win.Trojan.Pivis-2' and 'Doc.Trojan.Akuma-2' further support the malicious nature of the file.

Heuristics 4

  • ClamAV: Win.Trojan.Pivis-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Pivis-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
25b4b98fdd698ba051518bed9e3f56641a19cf52a60854ed2b7e2666786c7250		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 21371 bytes
Detection
ClamAV: Doc.Trojan.Akuma-2
Obfuscation or payload: unlikely

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