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

Static analysis result for SHA-256 5bc7a901acb66ae3…

MALICIOUS

Office (OLE) / .XLS

367.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: d3c7f6a4a2fd31315b492e902e22d9e3 SHA-1: fcaf31160e2c65ce8e8a3d71639ae5b8df4ac488 SHA-256: 5bc7a901acb66ae3355ec9b6cb8560b40adb8517169d10dc8694bcfcddacee5a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1105 Ingress Tool Transfer

The sample is an Excel 4.0 macro sheet (XLM) with an Auto_Open macro, indicating it will execute automatically when the workbook is opened. It contains an 'enable lure' heuristic, suggesting it prompts the user to enable macros. The macro sheet also contains embedded URLs that are likely used to download a second-stage payload. The presence of an Auto_Open macro and the embedded URLs strongly suggest a malicious document designed to download and execute further malware.

Heuristics 4

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 https://smartpalakatva.com/edQsUZOLlE/th.html
    • https://pilstlcommodities.com/Ov4FlB3lpy/th.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
e61304013e31eadd8bf35fc5d3e6cbadd61463966f2a2d09ae24f65eb0ee3106		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 8349 bytes

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