Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 390b8eb332b59197…

MALICIOUS

Office (OLE)

112.0 KB Created: 2010-03-11 14:00:00 Authoring application: Microsoft Word 11.5.6
MD5: 226bf2a436e0ec78920db1cb1fa2b268 SHA-1: 5ee4b979333d433989e9993f7c38573586eba3f6 SHA-256: 390b8eb332b59197d2d8e208a3c44f430fca7dc5f6f1459dfad01712c6ee3a1d
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File

The sample is a malicious Microsoft Word document containing VBA macros, specifically a Document_Open macro. The document body presents a fake programming challenge to trick the user into enabling macros. Upon enabling, the Document_Open macro is executed, which is highly indicative of a downloader or initial execution stage. The embedded URL and the extracted macros.bas file are key indicators of malicious activity.

Heuristics 5

  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://207.106.34.101/rugstore/assets/product_images/sk70navy.jpg

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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