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

Static analysis result for SHA-256 8ef2d30adee7c780…

MALICIOUS

Office (OLE) / .XLSX

181.5 KB Created: 2021-04-13 13:37:17 Authoring application: Microsoft Excel
MD5: 3b0c07c41b797f2b0ffcae966cc9a82d SHA-1: b672f397332baea3f71459132820c2d95af8d2b4 SHA-256: 8ef2d30adee7c780cf545fa682c0b3d5fe6888b98aa44a672a6aee0ba177f550
220 Risk Score

Malware Insights

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

The sample is an Excel spreadsheet containing a Workbook_Open VBA macro. This macro is designed to execute code, likely by downloading and running a second-stage payload from the embedded URL http://31.210.20.6/w2/Hoxmq.ex. The presence of CreateObject and references to WScript further indicate execution capabilities.

Heuristics 7

  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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://31.210.20.6/w2/Hoxmq.ex

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7ec5706486f0ae7674b581d8570ff787d9800f2fe248570d9a3ff4290ab906fb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1203 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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