MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The file contains Excel 4.0 macros, specifically an Auto_Open defined name, which is a critical finding. This indicates the macro will execute automatically upon opening the workbook. The presence of dangerous formula APIs like RUN suggests the macro is designed to execute arbitrary code, likely to download and run a secondary payload. No specific family could be identified.
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) | 6916 bytes |
SHA-256: 7671720d5dc3a1bc5aba02ee07b3de0015d2bb1ca0c004e95e5a4ef47e15d981 |
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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 - vBkmdlsnODQ ' 0018 26 LABEL : Cell Value, String Constant - AFdhFxTArhf len=0 ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!G174 ' 0018 20 LABEL : Cell Value, String Constant - BxVdT len=0 ' 0018 21 LABEL : Cell Value, String Constant - fnUxPp len=0 ' 0018 21 LABEL : Cell Value, String Constant - FTLsjr len=0 ' 0018 21 LABEL : Cell Value, String Constant - gQwBri len=0 ' 0018 20 LABEL : Cell Value, String Constant - GTiVA len=0 ' 0018 25 LABEL : Cell Value, String Constant - ixqHiZLSXU len=0 ' 0018 26 LABEL : Cell Value, String Constant - jLEccFimKla len=0 ' 0018 24 LABEL : Cell Value, String Constant - kdVjuupnS len=0 ' 0018 27 LABEL : Cell Value, String Constant - LnSUbWIkhcdd len=0 ' 0018 26 LABEL : Cell Value, String Constant - nSAgSfHosLR len=0 ' 0018 22 LABEL : Cell Value, String Constant - rtYSLot len=0 ' 0018 27 LABEL : Cell Value, String Constant - rWrgrKEIEXvq len=0 ' 0018 26 LABEL : Cell Value, String Constant - SfnQLYVFURa len=0 ' 0018 20 LABEL : Cell Value, String Constant - sVMVF len=0 ' 0018 26 LABEL : Cell Value, String Constant - tHGFRHAqcdO len=0 ' 0018 23 LABEL : Cell Value, String Constant - VoMWVAlC len=0 ' 0018 26 LABEL : Cell Value, String Constant - wKgoZfdIoDs len=0 ' 0018 21 LABEL : Cell Value, String Constant - ZLiWMP len=0 ' 0018 21 LABEL : Cell Value, String Constant - zXhQtk 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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