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

Static analysis result for SHA-256 0138286d1545660f…

MALICIOUS

Office (OLE) / .XLS

91.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 79c45d76cf9a0faa20eed189eae8636d SHA-1: 1c956cb1ba32d075f94f141b0426a4f5a2f8cec7 SHA-256: 0138286d1545660f4fd6f48ba716b1e9ebbe3c67885091a9494527d0d6388b44
162 Risk Score

Malware Insights

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

The file contains an Excel 4.0 macro sheet with an Auto_Open entry, which is designed to execute automatically when the workbook is opened. This macro uses the RUN function to execute a downloaded payload from the URL https://helendunnosteopathy.co.uk/ds/2202.gif. The document body also contains text that attempts to lure the user into enabling macros.

Heuristics 5

  • 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.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • 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://helendunnosteopathy.co.uk/ds/2202.gif

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
f8e4496a98963101db60727dd23897fc0561510d7b10f276fec256634eb54971		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 3016 bytes

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