Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 98c8486c5aac6781…

MALICIOUS

Office (OLE)

23.5 KB Created: 2021-07-05 07:23:29 Authoring application: Microsoft Excel
MD5: 53db35996b20f92129431dfd33f25f13 SHA-1: 21ff64bba77db0e7023b34e33685957cc29bc22c SHA-256: 98c8486c5aac678117a1d709b784da6a5f60024090c0cde14eaddb989fabf191
62 Risk Score

Malware Insights

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

The sample is an Excel file containing a VBA macro with an Auto_Open subroutine. This subroutine calls the DllInstall function with a URL, indicating an attempt to download and execute a script. The embedded URL is http://192.236.147.189/execute/uploads/Excel.sct, which is likely the second-stage payload. This pattern is consistent with a macro-based downloader used in spearphishing attacks.

Heuristics 3

  • Auto_Open macro high OLE_VBA_AUTO
    Auto_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://192.236.147.189/execute/uploads/Excel.sct$
    • http://192.236.147.189/execute/uploads/Excel.sct

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
5a8d323a3543ed501ee493fe94173d5a0e22776cbca8e88304a558f2e9b82c96		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2072 bytes

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