Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 cd5ed760d8b1342f…

MALICIOUS

Office (OLE)

38.0 KB Created: 2006-08-15 04:53:00 Authoring application: Microsoft Word 11.2
MD5: 68b791302d5a9732edf96c2764ac7d6b SHA-1: e62824e876016b7c6f05276400bd142a929f15c2 SHA-256: cd5ed760d8b1342fdbeb6ae38abba327e2b23c9cfd400bbfa4ff8756d5ed3d05
180 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Doc.Trojan.Thus-5. Static analysis detected VBA macros, specifically a Document_Open macro, indicating that malicious code executes upon opening the document. The presence of the 'macros.bas' artifact further confirms the macro-based nature of the threat. The likely intent is to download and execute a secondary payload, although the specific mechanism is not detailed in the provided evidence.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-5 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-5
  • 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
8b0b2dbb461ffd077ee84999d88789ec94dd4c52f67490ffb939ec398d8d8145		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2341 bytes
Detection
ClamAV: Doc.Trojan.Thus-5
Obfuscation or payload: unlikely

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