Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5aed4586829ffcca…

MALICIOUS

Office (OLE)

30.0 KB Created: 2003-05-30 00:48:00 Authoring application: Microsoft Word 10.1
MD5: e3f9f5489b0dcd24ca5cbacab9d1844f SHA-1: 84a7f84c8f72979186c094db519dc902241c246f SHA-256: 5aed4586829ffccaac8f1282af791a5c5b69b4989e2727bb1928f8ec3992ef14
180 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV with the signature Doc.Trojan.Thus-8. It contains a VBA macro within the Document_Open subroutine, which is designed to execute automatically when the document is opened. This macro attempts to ensure its own persistence and potentially download additional payloads, indicating a downloader or dropper functionality.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-8 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-8
  • 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
751424cd5c191d02c834ae869229a0691bef79ca2be445c5356c5487df2955da		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2393 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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