Malicious Office (OLE) / .DOCX — malware analysis report

Static analysis result for SHA-256 b09f1c3a49013217…

MALICIOUS

Office (OLE) / .DOCX

36.0 KB Created: 2001-06-06 04:53:00 Authoring application: Microsoft Word 8.0
MD5: 19efcb1c153a9a14361fa8652422c79d SHA-1: f9feba8df48f34ebd6833dff407e128216c967e2 SHA-256: b09f1c3a49013217615af17b0fdcd54001678fb99bac9647a6f0955e563d5a4f
342 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The sample contains a Workbook_Open VBA macro that uses CreateObject to launch Excel and then saves a malicious workbook to the startup path. This macro is designed to download and execute a second-stage payload. The embedded URLs are likely related to the payload delivery. The ClamAV detection 'Doc.Trojan.Hopper-12' further supports the malicious nature of the file.

Heuristics 9

  • ClamAV: Doc.Trojan.Hopper-12 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Hopper-12
  • 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.
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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.sourceofkaos.com/homes/1nternal�
    • http://www.sourceofkaos.com/homes/1nternal

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
9888115ddf7771c7250ea25d88719bbc4de8d0e91ff5493d81f7a92aed3ada64		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6101 bytes
Detection
ClamAV: Doc.Trojan.Hopper-12
Obfuscation or payload: likely
Carved artifact contains 11 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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