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

Static analysis result for SHA-256 a7cdd141806d7a5d…

MALICIOUS

Office (OLE) / .XLS

367.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: f5b4ded8da0b98b964b602bb31bd56ec SHA-1: 2e8b3000d5307674fa92d922a34e0f90af0162a8 SHA-256: a7cdd141806d7a5df9194a82aaf07eb82cb22f47a69e235796585b42c90a3588
102 Risk Score

Malware Insights

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

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet. It contains an Auto_Open macro, which is a common technique for automatic execution upon opening the document. The document body and extracted macro content indicate the presence of embedded URLs, specifically 'https://stateoftheartacademy.com.br/E4V8njAb2/ue.html' and 'https://dsafarm.com/h03itpGP/ue.html'. The presence of a 'Macro/content-enable lure' heuristic firing suggests the document is designed to prompt the user to enable macros, thereby initiating the malicious macro execution. The XLM macros are likely intended to download and execute a second-stage payload from these URLs.

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://stateoftheartacademy.com.br/E4V8njAb2/ue.html
    • https://dsafarm.com/h03itpGP/ue.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
e808156aa76369abc653ef5da0e4637a11444d74c8ce4e627b8f3942d60b3178		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 8209 bytes

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