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 sheet that contains an 'Auto_Open' defined name, indicating it will execute macros automatically when opened. The presence of dangerous formula APIs, specifically 'RUN', suggests the macro is designed to execute arbitrary commands. While the exact command is not fully recoverable from the provided evidence, the technique strongly implies a malicious intent to run an external 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) | 6693 bytes |
SHA-256: 9ed6c871ce50f3f23902c95e93bdfdfc56fe4f4d50c9e7210f6a1f1ecc12a6c2 |
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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 19 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - gnZnbEiVzm ' 0018 24 LABEL : Cell Value, String Constant - aRfCXeIIS len=0 ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!A180 ' 0018 25 LABEL : Cell Value, String Constant - DHlThhJpOx len=0 ' 0018 24 LABEL : Cell Value, String Constant - DokzwdXoE len=0 ' 0018 22 LABEL : Cell Value, String Constant - DxLJTnM len=0 ' 0018 26 LABEL : Cell Value, String Constant - EHZJuhCWhth len=0 ' 0018 20 LABEL : Cell Value, String Constant - FuYjb len=0 ' 0018 22 LABEL : Cell Value, String Constant - jgUXGRN len=0 ' 0018 22 LABEL : Cell Value, String Constant - kSBBzbQ len=0 ' 0018 24 LABEL : Cell Value, String Constant - kxbVqmDlL len=0 ' 0018 21 LABEL : Cell Value, String Constant - ocXcej len=0 ' 0018 22 LABEL : Cell Value, String Constant - owUUZhu len=0 ' 0018 24 LABEL : Cell Value, String Constant - qFSWcHFrW len=0 ' 0018 27 LABEL : Cell Value, String Constant - qlDJQvGUIsXS len=0 ' 0018 22 LABEL : Cell Value, String Constant - tcSYkDc len=0 ' 0018 21 LABEL : Cell Value, String Constant - tdkiMl len=0 ' 0018 22 LABEL : Cell Value, String Constant - UVYiSJu len=0 ' 0018 27 LABEL : Cell Value, String Constant - vhudRAAyBYeq len=0 ' 0018 22 LABEL : Cell Value, String Constant - VwXyOaH len=0 ' 0018 27 LABEL : Cell Value, String Constant - ythZcqKtxPGk len=0 ' 0018 27 LABEL : Cell Value, String Constant - YVYwBBWMguRi 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 ' 00f ... (truncated) |
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