MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The sample is an Excel file containing Excel 4.0 (XLM) macros, specifically triggering an Auto_Open macro. This indicates the file is designed to execute arbitrary code upon opening. The presence of dangerous formula APIs in the Auto_Open macro suggests it's intended to download and execute a secondary payload, a common technique for initial access and further compromise.
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) | 6639 bytes |
SHA-256: 55163cce3e5294e6421c61880dae820988d19b9510b7bd5c986288803be2d061 |
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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 - hvYZlASttkw ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!F148 ' 0018 22 LABEL : Cell Value, String Constant - bHZJWBw len=0 ' 0018 27 LABEL : Cell Value, String Constant - cAbJLASsSeMF len=0 ' 0018 20 LABEL : Cell Value, String Constant - cDbmw len=0 ' 0018 25 LABEL : Cell Value, String Constant - DvSPGwBrFd len=0 ' 0018 22 LABEL : Cell Value, String Constant - EXORfhd len=0 ' 0018 21 LABEL : Cell Value, String Constant - fRDaRQ len=0 ' 0018 22 LABEL : Cell Value, String Constant - hFMrYWt len=0 ' 0018 25 LABEL : Cell Value, String Constant - iJDuMifwTr len=0 ' 0018 24 LABEL : Cell Value, String Constant - IYwmVLMRN len=0 ' 0018 25 LABEL : Cell Value, String Constant - kBgqCpwKLO len=0 ' 0018 21 LABEL : Cell Value, String Constant - LLxfuY len=0 ' 0018 25 LABEL : Cell Value, String Constant - OCyTZJAlHW len=0 ' 0018 25 LABEL : Cell Value, String Constant - PHKkJBtZyl len=0 ' 0018 26 LABEL : Cell Value, String Constant - snTGQiHuRpv len=0 ' 0018 27 LABEL : Cell Value, String Constant - SPZdqfvTGsPU len=0 ' 0018 21 LABEL : Cell Value, String Constant - sVMqFs len=0 ' 0018 20 LABEL : Cell Value, String Constant - trXCX len=0 ' 0018 27 LABEL : Cell Value, String Constant - UrdexJUDEyDr len=0 ' 0018 20 LABEL : Cell Value, String Constant - yCcWi len=0 ' 0018 26 LABEL : Cell Value, String Constant - YQGKAhUMHTb 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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