MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The file contains critical heuristic firings indicating the presence of Excel 4.0 macros with an Auto_Open defined name and dangerous formula APIs, specifically the RUN function. This suggests the macro is designed to execute arbitrary code upon opening the document. While no specific URLs or hashes were extracted, the presence of Auto_Open strongly implies a downloader or initial execution stage for further malicious activity.
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) | 6834 bytes |
SHA-256: 8bca15adfa977a7c0a3694191c019d134255fe41dcf865a3c54b2b3ebe4ee09f |
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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 18 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - LIOhsbAOf ' 0018 23 LABEL : Cell Value, String Constant - aPTyzcFM len=0 ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!I150 ' 0018 24 LABEL : Cell Value, String Constant - BlAcAHJwO len=0 ' 0018 21 LABEL : Cell Value, String Constant - bngOym len=0 ' 0018 25 LABEL : Cell Value, String Constant - CkqTkPwSCO len=0 ' 0018 21 LABEL : Cell Value, String Constant - CKseOD len=0 ' 0018 27 LABEL : Cell Value, String Constant - eIXyNoWbSibe len=0 ' 0018 23 LABEL : Cell Value, String Constant - eUQHlkRm len=0 ' 0018 24 LABEL : Cell Value, String Constant - fGUXJEoVK len=0 ' 0018 24 LABEL : Cell Value, String Constant - GAkpoRqYm len=0 ' 0018 22 LABEL : Cell Value, String Constant - GJdAmey len=0 ' 0018 23 LABEL : Cell Value, String Constant - hjSyqkUc len=0 ' 0018 23 LABEL : Cell Value, String Constant - ICGNKSZN len=0 ' 0018 26 LABEL : Cell Value, String Constant - iVnPksLrtwE len=0 ' 0018 27 LABEL : Cell Value, String Constant - JZybZItybxpI len=0 ' 0018 23 LABEL : Cell Value, String Constant - LfueTxHm len=0 ' 0018 21 LABEL : Cell Value, String Constant - Nrfanm len=0 ' 0018 21 LABEL : Cell Value, String Constant - qaZTcA len=0 ' 0018 21 LABEL : Cell Value, String Constant - uwxUhY len=0 ' 0018 22 LABEL : Cell Value, String Constant - wtnyLhQ len=0 ' 0018 25 LABEL : Cell Value, String Constant - YZYDqvNWLX 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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