MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The file contains an Excel 4.0 macro sheet with an Auto_Open defined name, indicating it will execute automatically upon opening. Heuristics confirm the presence of dangerous formula APIs, specifically related to execution, suggesting the macro is designed to run malicious code. The macro's intent is to execute arbitrary code upon opening the document.
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) | 6641 bytes |
SHA-256: 50456a39eea5e65a0ccc54afc88edc65f20744f5eb5464fe41777d6f4bbd654b |
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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 - ZBtsIteeben ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!C147 ' 0018 20 LABEL : Cell Value, String Constant - bRtMH len=0 ' 0018 22 LABEL : Cell Value, String Constant - cFhYcBd len=0 ' 0018 27 LABEL : Cell Value, String Constant - cHMlzeyLZlcL len=0 ' 0018 22 LABEL : Cell Value, String Constant - fdprbVk len=0 ' 0018 23 LABEL : Cell Value, String Constant - FluSBqUk len=0 ' 0018 21 LABEL : Cell Value, String Constant - GtkTii len=0 ' 0018 21 LABEL : Cell Value, String Constant - HvTqjT len=0 ' 0018 20 LABEL : Cell Value, String Constant - Iqfad len=0 ' 0018 25 LABEL : Cell Value, String Constant - iYgNYfVtFR len=0 ' 0018 27 LABEL : Cell Value, String Constant - jFXnFwArTCGO len=0 ' 0018 27 LABEL : Cell Value, String Constant - NNVdbjBfcrLa len=0 ' 0018 22 LABEL : Cell Value, String Constant - oPCQgDV len=0 ' 0018 25 LABEL : Cell Value, String Constant - TiAwSfylyO len=0 ' 0018 26 LABEL : Cell Value, String Constant - TWOevbpaLAL len=0 ' 0018 24 LABEL : Cell Value, String Constant - UUBFaukhF len=0 ' 0018 23 LABEL : Cell Value, String Constant - vsMgDNLN len=0 ' 0018 22 LABEL : Cell Value, String Constant - wOaFtaQ len=0 ' 0018 23 LABEL : Cell Value, String Constant - xhxcvtuz len=0 ' 0018 22 LABEL : Cell Value, String Constant - XQbnuAi len=0 ' 0018 27 LABEL : Cell Value, String Constant - zaUQGBiqnTkw 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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