MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The sample is an Excel file containing Excel 4.0 (XLM) macros, specifically an Auto_Open macro. This indicates an attempt to automatically execute code when the workbook is opened. The presence of dangerous formula APIs like RUN suggests the macro is intended to download and execute a second-stage payload, a common technique for malware delivery.
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) | 6651 bytes |
SHA-256: e00452d36b2fda73229ed92160555dc8c5febb78bed111d12b7e67a8b8984f27 |
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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 20 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - TVxbUWlwpxA ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!G151 ' 0018 26 LABEL : Cell Value, String Constant - eDXhVyCYCgW len=0 ' 0018 24 LABEL : Cell Value, String Constant - hMjJqDtwx len=0 ' 0018 25 LABEL : Cell Value, String Constant - hQfQCkydEj len=0 ' 0018 24 LABEL : Cell Value, String Constant - hRUfuSuxN len=0 ' 0018 24 LABEL : Cell Value, String Constant - ItnlBNSYR len=0 ' 0018 27 LABEL : Cell Value, String Constant - jWQvYjmIkZOw len=0 ' 0018 22 LABEL : Cell Value, String Constant - KtHuuIm len=0 ' 0018 27 LABEL : Cell Value, String Constant - KtPYqTrYycac len=0 ' 0018 21 LABEL : Cell Value, String Constant - lHRDfq len=0 ' 0018 27 LABEL : Cell Value, String Constant - MHCEnQhNMQwL len=0 ' 0018 22 LABEL : Cell Value, String Constant - mvJniJb len=0 ' 0018 23 LABEL : Cell Value, String Constant - nefuhXSj len=0 ' 0018 23 LABEL : Cell Value, String Constant - oqbXfHzy len=0 ' 0018 26 LABEL : Cell Value, String Constant - rANdicYAomZ len=0 ' 0018 26 LABEL : Cell Value, String Constant - ROdPuiVtZoF len=0 ' 0018 20 LABEL : Cell Value, String Constant - ryYTv len=0 ' 0018 21 LABEL : Cell Value, String Constant - VgptWk len=0 ' 0018 22 LABEL : Cell Value, String Constant - VRqUKkw len=0 ' 0018 23 LABEL : Cell Value, String Constant - WGbXWIXM len=0 ' 0018 22 LABEL : Cell Value, String Constant - zOiEOrs 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 ... (truncated) |
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