Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 86985b5903a61997…

MALICIOUS

Office (OLE)

57.5 KB Created: 2010-03-15 10:11:00 Authoring application: Microsoft Word 10.0
MD5: d07ca465215ea103d425db5d699dbaf4 SHA-1: 08547beb09b12a444a0004b173fcde8bb3104598 SHA-256: 86985b5903a619978e2594ddcbf10fcea93fe127491863a6274576aedeee0805
180 Risk Score

Malware Insights

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

The sample contains a VBA macro that is triggered by the Document_Open event. This macro is designed to disable virus protection and potentially download and execute a secondary payload, as indicated by the ClamAV detection name 'Doc.Trojan.Thus-8'. The macro attempts to copy itself to the Normal template and other open documents to ensure persistence.

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
af55229a1ada67e6b196c7ac73b9d803334581ae61bc0f450f03ba895097df20		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2372 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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