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

Static analysis result for SHA-256 bf731f25d23bc283…

MALICIOUS

Office (OLE) / .XLS

367.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: ded7e55f26bc0d513ea3a1c24db7f16c SHA-1: a9b2ac9b1c9d3ca0c0b1d50a61ecc13675efcfbc SHA-256: bf731f25d23bc2831c380fa0610eb344090afae558c9bcc76c39c61e6951fdf6
102 Risk Score

Malware Insights

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

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet. It contains an Auto_Open macro that likely executes when the document is opened. The document body contains text that appears to be a deconstructed URL, and the embedded URLs are suspicious. The macro likely attempts to download and execute a second-stage payload from one of the provided URLs, such as 'https://smartpalakatva.com/edQsUZOLlE/th.html' or 'https://pilstlcommodities.com/Ov4FlB3lpy/th.html'. The 'SE_ENABLE_LURE' heuristic indicates the document likely prompts the user to enable macros.

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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