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

Static analysis result for SHA-256 44147fabdb1ea91d…

MALICIOUS

Office (OLE) / .XLS

367.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 591eedf6615f5a3850529385a9c2efc4 SHA-1: 5eaed5d724028f6d7c6a8b8ad5424a720365110c SHA-256: 44147fabdb1ea91d390d11dfa1c88bf1994ebb20d2884ee0ffecbaca10a58104
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 that is designed to execute when the document is opened. The document body and extracted macro content indicate that the macro will attempt to download a payload from either 'https://stateoftheartacademy.com.br/E4V8njAb2/ue.html' or 'https://dsafarm.com/h03itpGP/ue.html'. The presence of an 'enable lure' heuristic further supports that the document is designed to trick the user into enabling macros. The reconstructed string 'un.dll' and 'R.LMJJC.CBB.on.oadT.wnl.LDo.File.o.Dl' likely represent filenames or commands used in the execution chain.

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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