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

Static analysis result for SHA-256 08b7c0acca87991c…

MALICIOUS

Office (OLE) / .XLSX

379.5 KB Created: 2021-08-19 14:03:52 Authoring application: Microsoft Excel First seen: 2022-12-12
MD5: 584a769350afc926a3c428e240427eb4 SHA-1: 2c7604efdb661ef3912a616dbe915c4a9527311d SHA-256: 08b7c0acca87991cac2a2cbedf4d103860597bf075581094c51dce8725005c4f
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1059.003 Windows Command Shell

The Workbook_Open VBA macro executes a command that uses certutil.exe to download a second-stage executable from http://35.158.94.112/fif/6sEEKLlGoXKOHPz.exe and then executes it. This indicates a downloader or droppper functionality.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • LOLBin reference in VBA critical OLE_VBA_LOLBIN
    LOLBin reference in VBA
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • 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://35.158.94.112/fif/6sEEKLlGoXKOHPz.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
3b64183c239f206581deb324b778f29df652d714f1307a384e3ae89c8fe31f91		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1101 bytes

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