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

Static analysis result for SHA-256 76f95d1186b2e5e5…

MALICIOUS

Office (OLE) / .XLS

367.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: a7e4a98aa580e2c1150da922f2b86b2d SHA-1: f976365af83d565e49128bf4cc3b8296920ceb5d SHA-256: 76f95d1186b2e5e5f52c0f70147eafa5d4d272534f34e607f993ee337abd1d3d
102 Risk Score

Malware Insights

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

The sample is an Excel spreadsheet containing Excel 4.0 (XLM) macros, indicated by the OLE_XLM_AUTOOPEN and OLE_XLM_AUTOOPEN_DEFINEDNAME heuristics. The SE_ENABLE_LURE heuristic suggests the document prompts the user to enable macros. The extracted XLM macros likely download a second-stage payload from the embedded URLs. The confidence is high due to the clear presence of auto-execution macros and lure techniques.

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 — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.
    URL https://silvertoncc.com/ys1Btp80hx/th.html
    • https://christleadersworld.com/1TaIPHnbwbNV/th.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
740337535414e50f998f7a71055f9de0e2208abc42faca490883ba1d9c48deb1		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 8349 bytes

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