Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 039593bd5ec72c40…

MALICIOUS

Office (OLE)

38.0 KB Created: 2007-03-02 00:03:00 Authoring application: Microsoft Word 10.1
MD5: 24bdd9bd36716c21dd9436613fa6a05b SHA-1: 94d6de42b3861b43a91bf969d6b6bf51be652d9b SHA-256: 039593bd5ec72c40af869aebf17bfc08fe46ff169d794145b4d11bf872c0d57d
182 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The sample is a malicious Word document containing VBA macros, specifically a Document_Open macro designed to execute upon file opening. The ClamAV detection 'Doc.Trojan.Thus-8' indicates a known malicious signature. The macro attempts to disable virus protection and potentially establish persistence by modifying registry keys, as suggested by the heuristic firings and the structure of the VBA code which references `NormalTemplate.Saved` and `Application.Documents.Item(k).VBProject.VBComponents.Item(1).CodeModule.InsertLines`.

Heuristics 5

  • 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
  • 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://www.socialmediaclub.org/
    • http://www.backpack.com
    • http://www.dokuwiki.com
    • http://www.linkedin.com
    • http://del.icio.us
    • http://www.bloglines.com
    • http://www.technorati.com
    • http://www.basecamp.com

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
25c979216a3e5338ffd12d5339c82e0857536b35ddcf09baeac483f2a0b7d4ba		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2366 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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