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 containing an Auto_Open function. This function is designed to automatically execute when the workbook is opened, indicating an attempt to run malicious code. The presence of dangerous formula APIs within the macro sheet further supports this, suggesting the macro is intended to download and execute a secondary 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) | 6555 bytes |
SHA-256: 7d6861b0c1271a1ad9d28dcf0174b2e7ebff45a6a6513df2aa86227a7d77a784 |
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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 12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - Cyt ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!D154 ' 0018 23 LABEL : Cell Value, String Constant - cYoEbFMd len=0 ' 0018 26 LABEL : Cell Value, String Constant - dHpxalcDCix len=0 ' 0018 26 LABEL : Cell Value, String Constant - EVEbXtLDyMS len=0 ' 0018 20 LABEL : Cell Value, String Constant - eWXSd len=0 ' 0018 25 LABEL : Cell Value, String Constant - hiohqIILso len=0 ' 0018 27 LABEL : Cell Value, String Constant - jopYipGiLVJC len=0 ' 0018 20 LABEL : Cell Value, String Constant - jvIpa len=0 ' 0018 21 LABEL : Cell Value, String Constant - LTPQZS len=0 ' 0018 23 LABEL : Cell Value, String Constant - mTaCRohu len=0 ' 0018 20 LABEL : Cell Value, String Constant - Nbizl len=0 ' 0018 27 LABEL : Cell Value, String Constant - oRakOFzJUnla len=0 ' 0018 21 LABEL : Cell Value, String Constant - rGNYfQ len=0 ' 0018 26 LABEL : Cell Value, String Constant - RwmaJLLCEzW len=0 ' 0018 27 LABEL : Cell Value, String Constant - rypHmCCvYweh len=0 ' 0018 22 LABEL : Cell Value, String Constant - sPGtuuY len=0 ' 0018 25 LABEL : Cell Value, String Constant - uNMNGbAdEt len=0 ' 0018 23 LABEL : Cell Value, String Constant - vvvwxlNw len=0 ' 0018 26 LABEL : Cell Value, String Constant - WFkZkBgYlEr len=0 ' 0018 23 LABEL : Cell Value, String Constant - zwoCKiPI len=0 ' 0018 22 LABEL : Cell Value, String Constant - zyGnDYl 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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