MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The file is an Excel 4.0 macro-enabled workbook. Heuristics indicate the presence of an Auto_Open function, which is a common method for executing malicious code upon opening the document. The macro sheet contains references to dangerous formula APIs, specifically 'RUN', suggesting it is designed to execute arbitrary commands. The document body is heavily obfuscated and truncated, preventing a detailed analysis of its specific payload, but the presence of the Auto_Open function and dangerous APIs strongly suggests it acts as a downloader for a second-stage malicious payload.
Heuristics 3
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Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAMEoletools 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.
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XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FNExcel 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.
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Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPENWorkbook 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.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_macros.txt |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 6624 bytes |
SHA-256: 7bd6cdc42353ecf72a67f3a8e377aa1450796b650c68345f722d428d616c3c3f |
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Preview scriptFirst 1,000 lines of the extracted script
' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - JMhxN ' 0018 21 LABEL : Cell Value, String Constant - AQycNK len=0 ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!A189 ' 0018 22 LABEL : Cell Value, String Constant - CalSEuE len=0 ' 0018 21 LABEL : Cell Value, String Constant - ccrGsK len=0 ' 0018 24 LABEL : Cell Value, String Constant - cHrBmrXcL len=0 ' 0018 27 LABEL : Cell Value, String Constant - CxGgjxEkkuur len=0 ' 0018 26 LABEL : Cell Value, String Constant - CyRUjNjmMDC len=0 ' 0018 23 LABEL : Cell Value, String Constant - eBNZUoqc len=0 ' 0018 25 LABEL : Cell Value, String Constant - EemVuuxpEo len=0 ' 0018 23 LABEL : Cell Value, String Constant - eIBtzBBF len=0 ' 0018 24 LABEL : Cell Value, String Constant - ggrVPqPkZ len=0 ' 0018 26 LABEL : Cell Value, String Constant - JnkPwVebOBC len=0 ' 0018 25 LABEL : Cell Value, String Constant - leSLBiyHAg len=0 ' 0018 23 LABEL : Cell Value, String Constant - PaqnbMyP len=0 ' 0018 20 LABEL : Cell Value, String Constant - PdFKT len=0 ' 0018 25 LABEL : Cell Value, String Constant - qRzsMmuKQg len=0 ' 0018 22 LABEL : Cell Value, String Constant - tVcnnGj len=0 ' 0018 26 LABEL : Cell Value, String Constant - uXcPiWMwOwE len=0 ' 0018 22 LABEL : Cell Value, String Constant - XELUyTC len=0 ' 0018 24 LABEL : Cell Value, String Constant - YVSgqhKmS len=0 ' 0018 22 LABEL : Cell Value, String Constant - ZSlmbzV len=0 ' 002a 2 PRINTHEADERS : Print Row/Column Labels ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd ... (truncated) |
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