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 workbook. Static analysis detected an Auto_Open defined name and the use of dangerous formula APIs, specifically the RUN function, indicating an attempt to execute arbitrary code. The presence of an Auto_Open macro strongly suggests the intent to automatically run malicious code upon opening the document, likely 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) | 6600 bytes |
SHA-256: 0920c5722483ee049b3e0f11acca3354ecad46db0ecae4e7942b2a66bcfbbc93 |
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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 17 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - eODmdwmp ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!C158 ' 0018 23 LABEL : Cell Value, String Constant - AYQkMizO len=0 ' 0018 22 LABEL : Cell Value, String Constant - BoqJmnl len=0 ' 0018 20 LABEL : Cell Value, String Constant - DFfvL len=0 ' 0018 27 LABEL : Cell Value, String Constant - dFOnJnFKEFdB len=0 ' 0018 27 LABEL : Cell Value, String Constant - eMoUFeuvluDh len=0 ' 0018 26 LABEL : Cell Value, String Constant - EunPIWtfvNQ len=0 ' 0018 24 LABEL : Cell Value, String Constant - kvlpLtNmt len=0 ' 0018 22 LABEL : Cell Value, String Constant - mrlmwiW len=0 ' 0018 22 LABEL : Cell Value, String Constant - MxFSNYM len=0 ' 0018 23 LABEL : Cell Value, String Constant - nbCDNIBS len=0 ' 0018 24 LABEL : Cell Value, String Constant - NGKerOHQb len=0 ' 0018 24 LABEL : Cell Value, String Constant - NJSLviZTG len=0 ' 0018 21 LABEL : Cell Value, String Constant - nUdUsT len=0 ' 0018 23 LABEL : Cell Value, String Constant - OKBiTeZa len=0 ' 0018 25 LABEL : Cell Value, String Constant - OoisXVbdMP len=0 ' 0018 21 LABEL : Cell Value, String Constant - SElfeX len=0 ' 0018 22 LABEL : Cell Value, String Constant - tKpumxC len=0 ' 0018 23 LABEL : Cell Value, String Constant - ZixvUtQl len=0 ' 0018 22 LABEL : Cell Value, String Constant - ZWTUPJk len=0 ' 0018 22 LABEL : Cell Value, String Constant - ZzeFkeT 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 L ... (truncated) |
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