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

Static analysis result for SHA-256 5997160ca7af0b37…

MALICIOUS

Office (OLE) / .XLS

367.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 37971752cea1b47e969672de87dc9db4 SHA-1: 8566381ee7e3fe935b858a80c1188d2f43fdf876 SHA-256: 5997160ca7af0b37004eefdb554b1fc17e58aeaccae35aa67ce1671ae20da275
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Service Execution: Visual Basic T1204.002 Malicious File: Malicious Link

The sample is an Excel 4.0 macro-enabled spreadsheet that uses an Auto_Open macro to execute. The macro contains embedded URLs that are likely used to download and execute a second-stage payload. The document body also contains these URLs, reinforcing the malicious intent. The presence of an 'enable macros' lure further supports the malicious nature of the file.

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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