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 document detected with critical heuristics for Auto_Open functionality and the use of dangerous formula APIs like RUN. The presence of an Auto_Open entry indicates that the macro will execute automatically upon opening the workbook, likely to download and execute a second-stage payload. No specific family could be identified from the available evidence.
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) | 6394 bytes |
SHA-256: 34254b9968f25a487c7f2d1b91b195e65e4c095df1205120c9fae0f5a9929ac2 |
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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 13 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - phDs ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!F199 ' 0018 22 LABEL : Cell Value, String Constant - bcbIpud len=0 ' 0018 21 LABEL : Cell Value, String Constant - bcQxon len=0 ' 0018 21 LABEL : Cell Value, String Constant - BTTvvn len=0 ' 0018 26 LABEL : Cell Value, String Constant - dgiGIOvawNM len=0 ' 0018 26 LABEL : Cell Value, String Constant - DXpWwVOAgJV len=0 ' 0018 20 LABEL : Cell Value, String Constant - FqQRk len=0 ' 0018 24 LABEL : Cell Value, String Constant - ijyTfhrHU len=0 ' 0018 22 LABEL : Cell Value, String Constant - JVwmAYM len=0 ' 0018 24 LABEL : Cell Value, String Constant - kEkFBrrsu len=0 ' 0018 22 LABEL : Cell Value, String Constant - kpMEGHp len=0 ' 0018 21 LABEL : Cell Value, String Constant - lwygUF len=0 ' 0018 21 LABEL : Cell Value, String Constant - nnhYky len=0 ' 0018 23 LABEL : Cell Value, String Constant - nvOOZuYL len=0 ' 0018 23 LABEL : Cell Value, String Constant - QmLiOLLk len=0 ' 0018 27 LABEL : Cell Value, String Constant - SapKbjcWfzRh len=0 ' 0018 24 LABEL : Cell Value, String Constant - TlJQbIdDZ len=0 ' 0018 21 LABEL : Cell Value, String Constant - wjwzdT len=0 ' 0018 24 LABEL : Cell Value, String Constant - WwrfQrTEk len=0 ' 0018 26 LABEL : Cell Value, String Constant - xWtfEkfcusO len=0 ' 0018 21 LABEL : Cell Value, String Constant - YUPAws 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 10 LABELSST ... (truncated) |
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