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

Static analysis result for SHA-256 542ee8142d9ca8de…

MALICIOUS

Office (OLE) / .XLS

367.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 5e0abcf59a7a7976d21f13892bcd0ee9 SHA-1: 97488a19aba94f778bbe2d4ddc3ebfc18964cc31 SHA-256: 542ee8142d9ca8dea927766b7071e616af9c9487d83e0614b3212e32d1f3f8a2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Service Execution: Visual Basic T1204.002 Malicious Link: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell

The critical heuristic OLE_XLM_AUTOOPEN indicates the presence of Excel 4.0 macros designed to execute automatically upon opening the document. The SE_ENABLE_LURE heuristic confirms the document prompts the user to enable macros. The extracted DOC BODY content, when partially reconstructed, reveals strings like 'unrundll32.exe', 'R', 'LM', 'JJC', 'CBB', 'on', 'oadT', 'wnl', and the URLs 'https://smartpalakatva.com/edQsUZOLlE/th.html' and 'https://pilstlcommodities.com/Ov4FlB3lpy/th.html', suggesting the macro's intent is to download and execute a second-stage payload from these URLs. The presence of Auto_Open in the XLM macros further supports this execution flow.

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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