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

Static analysis result for SHA-256 2e0a14f44c7c3640…

MALICIOUS

Office (OLE) / .XLS

1.57 MB Created: 2009-04-15 07:28:19 Authoring application: Microsoft Excel
MD5: 52587892ec1fceab11b8616bc085e085 SHA-1: 56c48b170a67c4f24199b8ba4fd8a9981a0b9358 SHA-256: 2e0a14f44c7c36403f599175f56f972e6b3d1013894413598d1ee84ffa88b0cf
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is an Excel 4.0 (XLM) macro-enabled spreadsheet. Heuristics indicate the presence of an Auto_Open macro, which is a common technique for executing malicious code upon opening the document. The macro sheet contains references to 'RUN' and 'XL4Poppy', suggesting it is designed to execute commands or download additional payloads. The document body contains lists of names and addresses, potentially used as lures or for social engineering.

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.
  • 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.
  • Legacy Excel formula macro virus marker critical OLE_XLS_FORMULA_MACRO_VIRUS
    Workbook stream contains self-identifying legacy Excel formula macro virus markers. This indicates the document carries formula macro virus content even when no VBA project or modern XLM macro-sheet structure is present.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
2bd279f2f17aa9f3ec7ab63dc03ba895c7cb512ab4e5e312a2242558c042e0b4		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 1505649 bytes

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