MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The file is an Excel document containing Excel 4.0 (XLM) macros, specifically an Auto_Open macro. This macro is configured to execute dangerous functions, including the RUN function, indicating an intent to run external code. The presence of the Auto_Open macro and the use of dangerous functions strongly suggest that this file is designed to download and execute a second-stage 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) | 6606 bytes |
SHA-256: 176bcfba60e74bd4dcc80bad673993ab0d78dc37bba4c8e17aaaa61e3a51b2eb |
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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 - NdkTTVXliG ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!F141 ' 0018 22 LABEL : Cell Value, String Constant - DjccSlF len=0 ' 0018 27 LABEL : Cell Value, String Constant - fkTtKIqEoKjW len=0 ' 0018 25 LABEL : Cell Value, String Constant - FYKAyeyIjv len=0 ' 0018 22 LABEL : Cell Value, String Constant - HOlwwCV len=0 ' 0018 20 LABEL : Cell Value, String Constant - hxtKt len=0 ' 0018 25 LABEL : Cell Value, String Constant - jVeWNHJhyr len=0 ' 0018 25 LABEL : Cell Value, String Constant - ktixUUnLAw len=0 ' 0018 20 LABEL : Cell Value, String Constant - LOdnY len=0 ' 0018 21 LABEL : Cell Value, String Constant - MyuQVW len=0 ' 0018 25 LABEL : Cell Value, String Constant - oDCZOyqZun len=0 ' 0018 25 LABEL : Cell Value, String Constant - pIkKWOPlRL len=0 ' 0018 27 LABEL : Cell Value, String Constant - qINpzFcjeRXB len=0 ' 0018 23 LABEL : Cell Value, String Constant - TXLmQoIy len=0 ' 0018 24 LABEL : Cell Value, String Constant - UkRkXjTZu len=0 ' 0018 20 LABEL : Cell Value, String Constant - Uvqza len=0 ' 0018 27 LABEL : Cell Value, String Constant - VtFGmAFwVrfW len=0 ' 0018 20 LABEL : Cell Value, String Constant - xnyZX len=0 ' 0018 26 LABEL : Cell Value, String Constant - XpnpAHQpeST len=0 ' 0018 22 LABEL : Cell Value, String Constant - yendwot len=0 ' 0018 26 LABEL : Cell Value, String Constant - ZojgifxOmFY 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 ' 00 ... (truncated) |
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