Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 70a8301618932ae0…

MALICIOUS

Office (OLE)

46.0 KB Created: 2010-03-23 16:01:00 Authoring application: Microsoft Word 11.5.6
MD5: 8978263efb438ab5082feacde6bc1e25 SHA-1: 55f3f80fb8c8f22514da5208775fd4961d11e90e SHA-256: 70a8301618932ae06637180ed5f1deb398b9b837a52c20dea261ad92d9db422e
180 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. The macro code appears to modify the document and potentially download additional payloads, as indicated by the ClamAV detections and the presence of VBA code. The document body is disguised as an educational worksheet to lure the user into enabling macros.

Heuristics 4

  • ClamAV: Doc.Trojan.Marker-40 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-40
  • 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
4d840735f64370eed491ae174d4c3cebc63d105512970d4d44c50b8d8ee19f18		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4261 bytes
Detection
ClamAV: Doc.Trojan.Marker-2
Obfuscation or payload: unlikely

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